Description
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Submission
class Solution { public: vector<vector<int>> construct2DArray(vector<int>& original, int m, int n) { if(original.size() != m * n) return {}; vector<vector<int>> rets(m, vector<int>(n)); for(int i = 0; i < m; ++i) { for(int j = 0; j < n; ++j) { rets[i][j] = original[i * n + j]; } } return rets; } };
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