vesko marinov

#include <iostream>
using namespace std;

int main() {
    int r, c;
    cin >> r >> c;

    int matrix[r][c];
    for (int i = 0; i < r; i++) {
        for (int j = 0; j < c; j++) {
            cin >> matrix[i][j];
        }
    }

    int row, col, sweat;
    while (true) {
        cin >> row;
        if (row == -1) {
            break;
        }
        cin >> col >> sweat;

        matrix[row][col] -= sweat;
        if (matrix[row][col] < 0) {
            matrix[row][col] = 0;
        }
    }

    for (int i = 0; i < r; i++) {
        for (int j = 0; j < c; j++) {
            if (j > 0) cout << " ";
            cout << matrix[i][j];
        }
        cout << endl;
    }

    return 0;
}