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Create convert-1d-array-into-2d-array.cpp
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// Time: O(m * n)
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// Space: O(1)
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class Solution {
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public:
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vector<vector<int>> construct2DArray(vector<int>& original, int m, int n) {
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if (size(original) != m * n) {
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return {};
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}
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vector<vector<int>> result;
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for (int i = 0; i < size(original); i += n) {
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result.emplace_back(cbegin(original) + i, cbegin(original) + i + n);
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}
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return result;
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}
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};

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