leetcode 日經貼，Cpp code -Search a 2D Matrix II

Search a 2D Matrix II

class Solution {
public:
    bool searchMatrix(vector<vector<int>>& matrix, int target) {
        int n = matrix.size();
        if (n == 0) return false;
        int m = matrix[0].size();
        if (m == 0) return false;
        int r = 0, c = m - 1;
        while (r < n && c >= 0) {
            if (matrix[r][c] == target) {
                return true;
            } else if (matrix[r][c] > target) {
                --c;
            } else {
                ++r;
            }
        }
        return false;
    }
};