02. Positions Of

#include <iostream>
#include <vector>

using namespace std;

int main() {
    int row, col, num;
    cin >> row >> col;

    vector<vector<int>> matrix;

    for (int i = 0; i < row; i++) {
        vector<int> currentRow;
        for (int j = 0; j < col; j++) {
            cin >> num;
            currentRow.push_back(num);
        }
        matrix.push_back(currentRow);
    }

    cin >> num;
    bool isfound = false;

    for (int i = 0; i < row; i++) {
        for (int j = 0; j < col; j++) {
            if (matrix[i][j] == num) {
                cout << i << ' ' << j << endl;
                isfound = true;
            }
        }
    }

    if (!isfound) {
        cout << "not found" << endl;
    }
    return 0;
}