Submission #1100853

#	Time	Username	Problem	Language	Result	Execution time	Memory
1100853		imarn	Curtains (NOI23_curtains)	C++14	0 / 100	1 ms	468 KiB

curtains

#include<bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
#define pll pair<ll,ll>
#define plx pair<ll,int>
#define f first
#define s second
#define pb push_back
#define all(x) x.begin(),x.end()
#define vi vector<int>
#define vl vector<ll>
#define vvi vector<vi>
using namespace std;
const int mxn=5e5+5;
int pr[mxn]{0};
int get(int r){
    return pr[r]==r?r:pr[r]=get(pr[r]);
}
int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);
    int n,m,q;cin>>n>>m>>q;
    iota(pr,pr+n+2,0);
    for(int i=1;i<=m;i++){
        int l,r;cin>>l>>r;r++;
        pr[get(r)]=pr[get(l)];
    }
    while(q--){
        int s,e;cin>>s>>e;e++;
        if(get(s)==get(e))cout<<"YES\n";
        else cout<<"NO\n";
    }
}

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