Submission #1107877

#	Time	Username	Problem	Language	Result	Execution time	Memory
1107877		_callmelucian	Gift Exchange (JOI24_ho_t4)	C++14	50 / 100	2555 ms	6260 KiB

Main

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> pl;
typedef pair<int,int> pii;
typedef tuple<int,int,int> tt;

#define all(a) a.begin(), a.end()
#define filter(a) a.erase(unique(all(a)), a.end())

bool solve (vector<int> a, vector<int> b, int n) {
    vector<int> p(n);
    for (int i = 0; i < n; i++) p[i] = i;

    sort(all(p), [&] (int i, int j) { return b[i] < b[j]; });

    bool pre = 0; int maxCur = 0;
    for (int i = 0; i < n; i++) {
        maxCur = max(maxCur, a[p[i]]);
        bool cur = (i + 1 < n && b[p[i + 1]] < maxCur);
        if (!pre && !cur) return 0;
        if (!cur) maxCur = 0;
        pre = cur;
    }
    return 1;
}

const int mn = 5e5 + 5;
int a[mn], b[mn];

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

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

    int q; cin >> q;
    while (q--) {
        int l, r; cin >> l >> r;
        vector<int> vec_a, vec_b;
        for (int i = l; i <= r; i++) {
            vec_a.push_back(a[i]);
            vec_b.push_back(b[i]);
        }
        cout << (solve(vec_a, vec_b, r - l + 1) ? "Yes" : "No") << "\n";
    }

    return 0;
}

• 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