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ZylalMinollariZylalMinollari
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feat: add php solution to lc problems: No.0041-0045 (#2646)
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‎solution/0000-0099/0041.First Missing Positive/README.md‎

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@@ -222,6 +222,40 @@ void swap(int* a, int* b) {
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}
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```
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```php
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class Solution {
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/**
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* @param integer[] $nums
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* @return integer
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*/
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function firstMissingPositive($nums) {
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$n = count($nums);
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for ($i = 0; $i < $n; $i++) {
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if ($nums[$i] <= 0) {
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$nums[$i] = $n + 1;
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}
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}
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for ($i = 0; $i < $n; $i++) {
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$num = abs($nums[$i]);
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if ($num <= $n) {
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$nums[$num - 1] = -abs($nums[$num - 1]);
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}
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}
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for ($i = 0; $i < $n; $i++) {
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if ($nums[$i] > 0) {
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return $i + 1;
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}
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}
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return $n + 1;
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}
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}
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```
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<!-- tabs:end -->
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<!-- end -->

‎solution/0000-0099/0041.First Missing Positive/README_EN.md‎

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Original file line numberDiff line numberDiff line change
@@ -222,6 +222,40 @@ void swap(int* a, int* b) {
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}
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```
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```php
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class Solution {
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/**
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* @param integer[] $nums
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* @return integer
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*/
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function firstMissingPositive($nums) {
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$n = count($nums);
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for ($i = 0; $i < $n; $i++) {
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if ($nums[$i] <= 0) {
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$nums[$i] = $n + 1;
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}
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}
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for ($i = 0; $i < $n; $i++) {
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$num = abs($nums[$i]);
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if ($num <= $n) {
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$nums[$num - 1] = -abs($nums[$num - 1]);
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}
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}
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for ($i = 0; $i < $n; $i++) {
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if ($nums[$i] > 0) {
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return $i + 1;
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}
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}
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return $n + 1;
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}
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}
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```
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<!-- tabs:end -->
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<!-- end -->

‎solution/0000-0099/0041.First Missing Positive/Solution.php‎

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class Solution {
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/**
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* @param integer[] $nums
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* @return integer
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*/
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function firstMissingPositive($nums) {
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$n = count($nums);
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for ($i = 0; $i < $n; $i++) {
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if ($nums[$i] <= 0) {
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$nums[$i] = $n + 1;
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}
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}
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for ($i = 0; $i < $n; $i++) {
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$num = abs($nums[$i]);
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if ($num <= $n) {
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$nums[$num - 1] = -abs($nums[$num - 1]);
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}
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}
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for ($i = 0; $i < $n; $i++) {
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if ($nums[$i] > 0) {
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return $i + 1;
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}
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}
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return $n + 1;
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}
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}

‎solution/0000-0099/0042.Trapping Rain Water/README.md‎

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@@ -187,6 +187,48 @@ public class Solution {
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}
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```
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```php
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class Solution {
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/**
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* @param integer[] $height
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* @return integer
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*/
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function trap($height) {
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$n = count($height);
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if ($n == 0) {
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return 0;
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}
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$left = 0;
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$right = $n - 1;
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$leftMax = 0;
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$rightMax = 0;
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$ans = 0;
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while ($left < $right) {
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if ($height[$left] < $height[$right]) {
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if ($height[$left] > $leftMax) {
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$leftMax = $height[$left];
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} else {
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$ans += $leftMax - $height[$left];
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}
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$left++;
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} else {
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if ($height[$right] > $rightMax) {
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$rightMax = $height[$right];
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} else {
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$ans += $rightMax - $height[$right];
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}
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$right--;
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}
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}
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return $ans;
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}
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}
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```
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<!-- tabs:end -->
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<!-- end -->

‎solution/0000-0099/0042.Trapping Rain Water/README_EN.md‎

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@@ -181,6 +181,48 @@ public class Solution {
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}
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```
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```php
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class Solution {
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/**
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* @param integer[] $height
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* @return integer
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*/
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function trap($height) {
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$n = count($height);
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if ($n == 0) {
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return 0;
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}
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$left = 0;
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$right = $n - 1;
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$leftMax = 0;
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$rightMax = 0;
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$ans = 0;
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while ($left < $right) {
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if ($height[$left] < $height[$right]) {
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if ($height[$left] > $leftMax) {
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$leftMax = $height[$left];
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} else {
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$ans += $leftMax - $height[$left];
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}
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$left++;
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} else {
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if ($height[$right] > $rightMax) {
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$rightMax = $height[$right];
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} else {
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$ans += $rightMax - $height[$right];
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}
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$right--;
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}
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}
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return $ans;
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}
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}
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```
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<!-- tabs:end -->
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<!-- end -->

‎solution/0000-0099/0042.Trapping Rain Water/Solution.php‎

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class Solution {
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/**
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* @param integer[] $height
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* @return integer
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*/
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function trap($height) {
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$n = count($height);
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if ($n == 0) {
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return 0;
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}
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$left = 0;
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$right = $n - 1;
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$leftMax = 0;
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$rightMax = 0;
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$ans = 0;
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while ($left < $right) {
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if ($height[$left] < $height[$right]) {
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if ($height[$left] > $leftMax) {
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$leftMax = $height[$left];
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} else {
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$ans += $leftMax - $height[$left];
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}
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$left++;
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} else {
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if ($height[$right] > $rightMax) {
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$rightMax = $height[$right];
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} else {
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$ans += $rightMax - $height[$right];
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}
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$right--;
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}
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}
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return $ans;
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}
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}

‎solution/0000-0099/0043.Multiply Strings/README.md‎

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@@ -263,6 +263,38 @@ public class Solution {
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}
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```
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```php
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class Solution {
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/**
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* @param string $num1
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* @param string $num2
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* @return string
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*/
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function multiply($num1, $num2) {
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$length1 = strlen($num1);
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$length2 = strlen($num2);
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$product = array_fill(0, $length1 + $length2, 0);
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for ($i = $length1 - 1; $i >= 0; $i--) {
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for ($j = $length2 - 1; $j >= 0; $j--) {
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$digit1 = intval($num1[$i]);
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$digit2 = intval($num2[$j]);
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$temp = $digit1 * $digit2 + $product[$i + $j + 1];
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$product[$i + $j + 1] = $temp % 10;
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$carry = intval($temp / 10);
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$product[$i + $j] += $carry;
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}
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}
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$result = implode("", $product);
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$result = ltrim($result, '0');
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return $result === "" ? "0" : $result;
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}
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}
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```
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<!-- tabs:end -->
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<!-- end -->

‎solution/0000-0099/0043.Multiply Strings/README_EN.md‎

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@@ -254,6 +254,38 @@ public class Solution {
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}
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```
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```php
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class Solution {
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/**
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* @param string $num1
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* @param string $num2
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* @return string
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*/
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function multiply($num1, $num2) {
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$length1 = strlen($num1);
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$length2 = strlen($num2);
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$product = array_fill(0, $length1 + $length2, 0);
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for ($i = $length1 - 1; $i >= 0; $i--) {
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for ($j = $length2 - 1; $j >= 0; $j--) {
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$digit1 = intval($num1[$i]);
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$digit2 = intval($num2[$j]);
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$temp = $digit1 * $digit2 + $product[$i + $j + 1];
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$product[$i + $j + 1] = $temp % 10;
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$carry = intval($temp / 10);
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$product[$i + $j] += $carry;
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}
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}
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$result = implode("", $product);
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$result = ltrim($result, '0');
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return $result === "" ? "0" : $result;
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}
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}
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```
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<!-- tabs:end -->
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<!-- end -->

‎solution/0000-0099/0043.Multiply Strings/Solution.php‎

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class Solution {
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/**
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* @param string $num1
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* @param string $num2
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* @return string
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*/
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function multiply($num1, $num2) {
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$length1 = strlen($num1);
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$length2 = strlen($num2);
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$product = array_fill(0, $length1 + $length2, 0);
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for ($i = $length1 - 1; $i >= 0; $i--) {
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for ($j = $length2 - 1; $j >= 0; $j--) {
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$digit1 = intval($num1[$i]);
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$digit2 = intval($num2[$j]);
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$temp = $digit1 * $digit2 + $product[$i + $j + 1];
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$product[$i + $j + 1] = $temp % 10;
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$carry = intval($temp / 10);
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$product[$i + $j] += $carry;
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}
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}
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$result = implode("", $product);
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$result = ltrim($result, '0');
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return $result === "" ? "0" : $result;
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}
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}

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