06. Reverse Matrix Diagonals

#include <iostream>
#include <vector>

using namespace std;

int main() {
    int row, col, n;
    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 >> n;
            currentRow.push_back(n);
        }
        matrix.push_back(currentRow);
    }

    for (int i = col - 1; i >= 0; i--) {
        int r = row;
        for (int j = i; j < col; j++) {
            cout << matrix[--r][j] << ' ';
            if (r == 0) {
                break;
            }
        }
        cout << endl;
    }

    for (int i = row - 2; i >= 0; i--) {
        int r = i;
        for (int j = 0; j < col; j++) {
            cout << matrix[r--][j] << ' ';
            if (r == -1) {
                break;
            }
        }
        cout << endl;
    }

    return 0;
}