Submission #1146540

#	Time	Username	Problem	Language	Result	Execution time	Memory
1146540		atharva_a_b	Curtains (NOI23_curtains)	C++17	0 / 100	2 ms	328 KiB

curtains

#include <iostream>
#include <vector>

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

    int32_t n, m, q;
    std::cin >> n >> m >> q;

    int32_t l, r, k;
    std::vector<std::vector<bool>> possible(n, std::vector<bool>(n, false));

    while(m--) {
        std::cin >> l >> r;
        --l, --r;
        possible[l][r] = true;
    }

    int32_t i, d;

    for(d = 1; d < n; ++d) {
        for(i = 0; i+d < n; ++i) {
            l = i, r = i+d;
            if(possible[l][r]) continue;
            for(k = l+1; k <= r; ++k) {
                if(possible[l][k-1] && possible[k][r]) {
                    possible[l][r] = true;
                    break;
                }
            }
        }
    }

    while(q--) {
        std::cin >> l >> r;
        --l, --r;
        std::cout << (possible[l][r] ? "YES\n" : "NO\n");
    }

    return 0;
}

• Subtask 1: 0 / 3
• Subtask 2: 0 / 6
• Subtask 3: 0 / 15
• Subtask 4: 0 / 20
• Subtask 5: 0 / 36
• Subtask 6: 0 / 20