#include <iostream>
#include <vector>

using GridRow = std::vector<int>;
using Grid = std::pmr::vector<GridRow>;

int n;
std::vector<std::vector<bool>> infected, wearing_mask;
std::vector<std::vector<int>> infection_flag;

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);

    std::cin >> n;

    return 0;
}