Submission #1141317

#	Time	Username	Problem	Language	Result	Execution time	Memory
1141317		Luvidi	Curtains (NOI23_curtains)	C++20	44 / 100	1594 ms	54712 KiB

curtains

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

#define ll long long
#define pll pair<ll, ll>
#define pii pair<int, int>
#define fs first
#define sc second
#define pb push_back

void solve() {
    int n,m,q;
    cin>>n>>m>>q;
    vector<int> a[n+1];
    while(m--){
        int l,r;
        cin>>l>>r;
        a[r].pb(l);
    }
    int ans[q];
    vector<pii> qry[n+1];
    bool b=1;
    for(int i=0;i<q;i++){
        int l,r;
        cin>>l>>r;
        b&=l==1;
        qry[r].pb({l,i});
    }
    int dp[n+1];
    memset(dp,-1,sizeof(dp));
    for(int i=1;i<=n;i++){
        for(int l:a[i]){
            dp[l]=i;
            for(int j=1;j<=l&&(!b||j<=1);j++)if(dp[j]>=l-1)dp[j]=i;
        }
        for(auto[l,idx]:qry[i]){
            ans[idx]=dp[l]==i;
        }
    }
    for(int i=0;i<q;i++){
        if(ans[i])cout<<"YES\n";
        else cout<<"NO\n";
    }
}

int main() {
    #ifdef FPO
        freopen("in","r",stdin);
        freopen("out","w",stdout);
    #endif
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    solve();
}

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