Submission #1084385

#	Time	Username	Problem	Language	Result	Execution time	Memory
1084385		Bananabread	Passport (JOI23_passport)	C++17	0 / 100	1 ms	604 KiB

passport

#include<bits/stdc++.h>
#define ll long long
#define ntr "\n"
#define mod (ll)(1e9+7)
#define taskname ""
#define frep freopen(taskname".inp","r",stdin); freopen(taskname".out","w",stdout);
using namespace std;
ll l[3001];
ll r[3001];
ll n;
ll q;
int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    //frep;
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>l[i]>>r[i];
    }
    ll dp[n+1][n+1];
    ll vis[n+1][n+1];
    cin>>q;
    for(int i=1;i<=q;i++){
        ll x;
        cin>>x;
        memset(dp,0x3f,sizeof(dp));
        memset(vis,0,sizeof(vis));
        dp[l[x]][r[x]]=1;
        queue<pair<ll,ll>> q;
        q.push({l[x],r[x]});
        while(!q.empty()){
            ll lu=q.front().first,ru=q.front().second;
            q.pop();
            if(vis[lu][ru]) continue;
            for(int i=lu;i<=ru;i++){
                ll nl=min(lu,l[i]);
                ll nr=max(ru,r[i]);
                if(dp[nl][nr]>dp[lu][ru]+1){
                    dp[nl][nr]=dp[lu][ru]+1;
                }
            }
        }
        cout<<(dp[1][n]<=1e18 ? dp[1][n] : -1)<<ntr;
    }
}

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