Submission #1283354

#	Time	Username	Problem	Language	Result	Execution time	Memory
1283354		soab	Curtains (NOI23_curtains)	C++20	0 / 100	4 ms	5080 KiB

curtains

// soab

#include <bits/stdc++.h>

using namespace std;

#define int long long 
#define nl '\n'
#define fi first
#define se second

void io() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);
}   

const int MAXN = 3 * 1e5 + 1;
int n, m, q;

vector<pair<int,int>> ctain(MAXN);

bool check(int l, int r) {
    bool st = 0, en = 0;
    int i = 0;
    while(ctain[i].fi < l) i++;
    if(ctain[i].fi != l) return 0;
    int cur = ctain[i].se;
    for(i; i < m; i++) {
        // cout << i << ' ' << cur << nl;
        if(ctain[i].fi > cur + 1) return 0;
        cur = max(cur, ctain[i].se);
        if(cur == r) return 1;
    }
    return 0;
}

void sub2() {
    sort(ctain.begin(), ctain.begin() + m);
    // for(int i = 0; i < m; i++) {
    //     cout << ctain[i].fi << ' ' << ctain[i].se << nl;
    // }

    for(int i = 0; i < q; i++) {
        int l, r; cin >> l >> r;
        cout << (check(l, r)? "YES" : "NO") << nl;
    }
}

signed main() {
    io();

    cin >> n >> m >> q;
    for(int i = 0; i < m; i++) {
        cin >> ctain[i].fi >> ctain[i].se;
    }

    sub2();
    
    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