g0201_0300.s0240_search_a_2d_matrix_ii.Solution.cpp Maven / Gradle / Ivy

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104 LeetCode algorithm problem solutions

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// #Medium #Top_100_Liked_Questions #Array #Binary_Search #Matrix #Divide_and_Conquer
// #Data_Structure_II_Day_4_Array #Binary_Search_II_Day_8 #Big_O_Time_O(n+m)_Space_O(1)
// #2024_05_24_Time_40_ms_(84.33%)_Space_17.4_MB_(49.98%)

#include 

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