제출 #1261687

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1261687		erering	Passport (JOI23_passport)	C++20	16 / 100	2097 ms	17328 KiB

passport

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define endl '\n'
#define pb push_back
const int N=2e5+5,inf=1e18;
int n;
pair<int,int> p[N];
int dp[2505][2505];
bool vis[2505][2505];
int solve(int l,int r){
    if(l==1 && r==n)return 0;
    if(vis[l][r])return dp[l][r];
   // cout<<l<<' '<<r<<endl;
    vis[l][r]=1; dp[l][r]=inf;
    for(int i=1;i<=n;i++){
        if(i<l || i>r)continue;
        if(l<=p[i].first && r>=p[i].second)continue;
        dp[l][r]=min(dp[l][r],solve(min(l,p[i].first),max(r,p[i].second))+1);
    }
    return dp[l][r];
}
signed main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin>>n;
    for(int i=1;i<=n;i++)cin>>p[i].first>>p[i].second;
    int q; cin>>q;
    while(q--){
        int x; cin>>x;
        int sol=solve(p[x].first,p[x].second)+1;
        cout<<(sol>1e9?-1:sol)<<endl;
    }
}

• Subtask 1: 0 / 6
• Subtask 2: 16 / 16
• Subtask 3: 0 / 24
• Subtask 4: 0 / 8
• Subtask 5: 0 / 46