Submission #731945

#	Time	Username	Problem	Language	Result	Execution time	Memory
731945		NemanjaSo2005	Passport (JOI23_passport)	C++14	48 / 100	2080 ms	722824 KiB

passport

#include<bits/stdc++.h>
#define ll long long
using namespace std;
int N,L[200005],R[200005],dist[200005],d1[200005],d2[200005];
bool ubacen[2505];
struct slog{
   int gde,kol;
}pp,tren;
bool cmp(slog a,slog b){
   return a.kol<b.kol;
}
vector<slog> V;
queue<slog> Q,C;
void BFS(){
   for(int i=1;i<=N;i++)
      dist[i]=-1;
   if(Q.size()==0){
      Q.push(C.front());
      C.pop();
   }
   while(C.size()){
      if(C.front().kol!=Q.front().kol)
         break;
      Q.push(C.front());
      C.pop();
   }
   while(Q.size()){
      tren=Q.front();
      Q.pop();
      if(dist[tren.gde]!=-1)
         continue;
      dist[tren.gde]=tren.kol;
      for(int i=1;i<=N;i++){
         if(tren.gde<L[i])
            continue;
         if(tren.gde>R[i])
            continue;
         pp.gde=i;
         pp.kol=tren.kol+1;
         while(C.size()){
            if(C.front().kol>pp.kol)
               break;
            Q.push(C.front());
            C.pop();
         }
         Q.push(pp);
      }
   }
   while(C.size())
      C.pop();
   return;
}
int main(){
   cin>>N;
   for(int i=1;i<=N;i++)
      cin>>L[i]>>R[i];
   for(int i=1;i<=N;i++){
      if(L[i]!=1)
         continue;
      pp.gde=i;
      pp.kol=0;
      Q.push(pp);
   }
   BFS();
   for(int i=1;i<=N;i++)
      d1[i]=dist[i];
   for(int i=1;i<=N;i++){
      if(R[i]!=N)
         continue;
      pp.gde=i;
      pp.kol=0;
      Q.push(pp);
   }
   BFS();
   for(int i=1;i<=N;i++)
      d2[i]=dist[i];
  /* for(int i=1;i<=N;i++)
      cout<<d1[i]<<" ";
   cout<<endl;
   for(int i=1;i<=N;i++)
      cout<<d2[i]<<" ";
   cout<<endl;*/
   for(int i=1;i<=N;i++){
      if(d1[i]==-1 or d2[i]==-1)
         continue;
      pp.gde=i;
      pp.kol=d1[i]+d2[i];
      V.push_back(pp);
   }
   if(V.size()){
      sort(V.begin(),V.end(),cmp);
      for(int i=0;i<V.size();i++)
         C.push(V[i]);
      BFS();
   }
   else
      for(int i=1;i<=N;i++)
         dist[i]=-1;
   int Q,x;
   cin>>Q;
   while(Q--){
      cin>>x;
      if(d1[x]==-1 or d2[x]==-1)
         cout<<"-1\n";
      else
         cout<<dist[x]+1<<"\n";
   }
   return 0;
}

Compilation message (stderr)

passport.cpp: In function 'int main()':
passport.cpp:92:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<slog>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   92 |       for(int i=0;i<V.size();i++)
      |                   ~^~~~~~~~~

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