g0001_0100.s0074_search_a_2d_matrix.Solution.cpp Maven / Gradle / Ivy

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// #Medium #Top_100_Liked_Questions #Array #Binary_Search #Matrix #Data_Structure_I_Day_5_Array
// #Algorithm_II_Day_1_Binary_Search #Binary_Search_I_Day_8 #Level_2_Day_8_Binary_Search
// #Udemy_2D_Arrays/Matrix #Big_O_Time_O(endRow+endCol)_Space_O(1)
// #2024_05_26_Time_0_ms_(100.00%)_Space_11.9_MB_(86.21%)

#include 

class Solution {
public:
    bool searchMatrix(const std::vector>& matrix, int target) {
        int endRow = matrix.size();
        int endCol = matrix[0].size();
        int targetRow = 0;
        bool result = false;

        for (int i = 0; i < endRow; i++) {
            if (matrix[i][endCol - 1] >= target) {
                targetRow = i;
                break;
            }
        }

        for (int i = 0; i < endCol; i++) {
            if (matrix[targetRow][i] == target) {
                result = true;
                break;
            }
        }

        return result;
    }
};