// 动态规划解决 class Solution { public: int minPathSum(vector<vector<int> >& matrix) { int m = matrix.size(), n = matrix[0].size(); vector<vector<int>> dp(m, vector<int>(n, 0)); dp[0][0] = matrix[0][0]; for(int i=1; i<n; i++) dp[0][i] = dp[0][i-1] + matrix[0][i]; for(int i=1; i<m; i++) dp[i][0] = dp[i-1][0] + matrix[i][0]; for(int i=1; i<m; i++) { for(int j=1; j<n; j++) { dp[i][j] = min(dp[i-1][j], dp[i][j-1])+matrix[i][j]; } } return dp[m-1][n-1]; } };