Submission #567262

#	Time	Username	Problem	Language	Result	Execution time	Memory
567262		Uzouf	Bitaro’s Party (JOI18_bitaro)	C++14	7 / 100	117 ms	2860 KiB

bitaro

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
#define int long long
#define endl "\n"
int mod=1e9+7;
const int N=1005;//1e5+5;
template<class x>
using ordered_multiset = tree<x, null_type,less_equal<x>, rb_tree_tag,tree_order_statistics_node_update>;

int n,m,t;
vector<vector<int> > v(N);
int ans[N];

signed main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    //freopen(".in", "r", stdin); freopen(".out", "w", stdout);

    cin>>n>>m>>t;
    for (int i=0;i<m;i++) {
      int a,b; cin>>a>>b;
      v[a].push_back(b);
    }

    for (int tt=0;tt<t;tt++) {
      bool busy[N];
      memset(busy,false,sizeof busy);

      int plc; cin>>plc;
      int b; cin>>b;
      for (int i=0;i<b;i++) {
        int x; cin>>x; busy[x]=true;
      }

      priority_queue<pair<int,int> > q;
      int dis[N];
      for (int i=0;i<N;i++) dis[i]=-1e10;

      for (int i=1;i<=n;i++) {
        if (busy[i]) continue;
        q.push({0,i}); dis[i]=0;
      }

      while (!q.empty()) {
        int i=q.top().second;
        int cst=q.top().first;
        q.pop();
        if (dis[i]>cst) continue;
        for (int j:v[i]) {
          int nw=cst+1;
          if (dis[j]<nw) {
            dis[j]=nw;
            q.push({dis[j],j});
          }
        }
      }
      if (dis[plc]==-1e10) dis[plc]=-1;
      ans[tt]=dis[plc];
    }

    for (int i=0;i<t;i++) cout<<ans[i]<<endl;
}

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