Submission #1032431

#	Time	Username	Problem	Language	Result	Execution time	Memory
1032431		Andrey	Gift Exchange (JOI24_ho_t4)	C++14	50 / 100	2590 ms	4692 KiB

Main

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

bool check(vector<pair<int,int>> haha) {
    sort(haha.begin(),haha.end());
    vector<int> su(haha.size()+1,INT_MAX);
    for(int i = haha.size()-1; i >= 0; i--) {
        su[i] = min(su[i+1],haha[i].second);
    }
    for(int i = 0; i < haha.size(); i++) {
        if((i == 0 || haha[i-1].first < haha[i].second) && su[i+1] > haha[i].first) {
            return false;
        }
    }
    return true;
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    int n,q,l,r;
    cin >> n;
    vector<int> a(n+1);
    vector<int> b(n+1);
    for(int i = 1; i <= n; i++) {
        cin >> a[i];
    }
    for(int i = 1; i <= n; i++) {
        cin >> b[i];
    }
    cin >> q;
    for(int i = 0; i < q; i++) {
        cin >> l >> r;
        vector<pair<int,int>> haha(0);
        for(int j = l; j <= r; j++) {
            haha.push_back({a[j],b[j]});
        }
        if(check(haha)) {
            cout << "Yes\n";
        }
        else {
            cout << "No\n";
        }
    }
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'bool check(std::vector<std::pair<int, int> >)':
Main.cpp:10:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |     for(int i = 0; i < haha.size(); i++) {
      |                    ~~^~~~~~~~~~~~~

• 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