Submission #1208954

#	Time	Username	Problem	Language	Result	Execution time	Memory
1208954		qilby	Gift Exchange (JOI24_ho_t4)	C++20	50 / 100	2592 ms	1864 KiB

Main

#include <bits/stdc++.h>

using namespace std;
using ll = long long;

const int N = 1000009;

int n, q, a[N], b[N], p[N];

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0);

    cin >> n;

    for (int i = 1; i <= n; i++) cin >> a[i];

    for (int i = 1; i <= n; i++) cin >> b[i];

    cin >> q;

    while (q--) {
        int ql, qr;
        cin >> ql >> qr;

        for (int i = 1; i <= n + n; i++) p[i] = 0;

        for (int i = ql; i <= qr; i++) p[a[i]]--, p[b[i]]++;

        bool bad = 0;
        int x = 0, lst = 0, k = 0;

        for (int i = 1; i <= n + n; i++) if (p[i] != 0) {
            k++;
            x += p[i];
            if (x == 0) {
                if (lst == k - 2) bad = 1;
                lst = k;
            }
        }

        cout << (bad ? "No" : "Yes") << "\n";
    }
}

• Subtask 1: 4 / 4
• Subtask 2: 5 / 5
• Subtask 3: 10 / 10
• Subtask 4: 31 / 31
• Subtask 5: 0 / 8
• Subtask 6: 0 / 12
• Subtask 7: 0 / 18
• Subtask 8: 0 / 12