Submission #1206346

#	Time	Username	Problem	Language	Result	Execution time	Memory
1206346		LM1	Curtains (NOI23_curtains)	C++20	3 / 100	1 ms	328 KiB

curtains

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define ff first
#define ss second
#define pb push_back
#define vi vector<int>
#define fr(i,ii,iii) for(int i=ii;i<iii;i++)
const int N=202;
int n,m,q;
pii p[N];
int f[N];
int main(){
	ios_base::sync_with_stdio(NULL);cin.tie(NULL);
	cin>>n>>m>>q;
	fr(i,1,m+1)cin>>p[i].ff>>p[i].ss;
	fr(i,0,q){
		int x,y;cin>>x>>y;
		fr(i,1,n+1)f[i]=0;
		fr(i,1,m+1){
			if(p[i].ff>=x and p[i].ss<=y){
				f[p[i].ff]++;
				f[p[i].ss+1]--;
			}
		}
		fr(i,1,n+1){
			f[i]+=f[i-1];
		}
		bool ok=1;
		fr(i,1,n+1){
			if(f[i]==0 and i>=x and i<=y){
				ok=0;
				break;
			}
			if(f[i]!=0 and (i<x or i>y)){
				ok=0;
				break;
			}
		}
		cout<<(ok?"YES":"NO")<<"\n";
	}
}
/*
6 2 1
1 2
3 4
1 4
*/

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