Update number-of-unique-good-subsequences.cpp

Author: kamyu104

C++/number-of-unique-good-subsequences.cpp

@@ -10,9 +10,9 @@ class Solution {
         bool has_zero = false;
         for (const auto& b : binary) {
             if (b == '1') {
-                ends1 = (ends1 + ends0 + 1) % MOD;  // add extra ends0 new distinct subsequences by a mapping rule and add one "1"*count_of_curr_1s
+                ends1 = (ends0 + ends1 + 1) % MOD;  // curr subsequences end with 1 is all prev distinct subsequences appended by 1 and plus "1"
             } else {
-                ends0 = (ends0 + ends1) % MOD;  // add extra ends1 new distinct subsequences by a mapping rule and don't add one "0"*count_of_curr_0s
+                ends0 = (ends0 + ends1) % MOD;  // curr subsequences end with 0 is all prev distinct subsequences appended by 0 and don't plus "0"
                 has_zero = true;
             }
         }