Submission #959388

#	Time	Username	Problem	Language	Result	Execution time	Memory
959388		irmuun	Bitaro’s Party (JOI18_bitaro)	C++17	14 / 100	2078 ms	20648 KiB

bitaro

#include<bits/stdc++.h>

using namespace std;

#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    ll n,m,q;
    cin>>n>>m>>q;
    ll s[m],e[m];
    vector<ll>up[n+5],down[n+5];
    for(ll i=0;i<m;i++){
        cin>>s[i]>>e[i];
        up[s[i]].pb(e[i]);
        down[e[i]].pb(s[i]);
    }
    vector<bool>vis(n+5,1);
    for(ll i=0;i<q;i++){
        ll t,y;
        cin>>t>>y;
        ll c[y];
        for(ll j=0;j<y;j++){
            cin>>c[j];
            vis[c[j]]=false;
        }
        ll ans=-1;
        vector<ll>dp(n+5,-1);
        dp[t]=0;
        for(ll j=t;j>=1;j--){
            if(dp[j]>-1){
                for(auto x:down[j]){
                    dp[x]=max(dp[x],dp[j]+1);
                }
            }
        }
        for(ll j=1;j<=n;j++){
            if(dp[j]>-1&&vis[j]){
                ans=max(ans,dp[j]);
            }
        }
        for(ll j=0;j<y;j++){
            vis[c[j]]=true;
        }
        cout<<ans<<"\n";
    }
}

• Subtask 1: 7 / 7
• Subtask 2: 7 / 7
• Subtask 3: 0 / 86