제출 #1024559

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1024559		huutuan	장난감 기차 (IOI17_train)	C++14	16 / 100	734 ms	99628 KiB

train

#include "train.h"

#include <bits/stdc++.h>

using namespace std;

const int N=5010;
vector<int> g[N];
int d[N][N];

void bfs(int root){
   queue<int> q;
   q.push(root);
   while (q.size()){
      int u=q.front();
      q.pop();
      for (int v:g[u]) if (!d[root][v]){
         d[root][v]=1;
         q.push(v);
      }
   }
}

vector<int> who_wins(vector<int> a, vector<int> r, vector<int> u, vector<int> v) {
   int n=a.size(), m=u.size();
   bool sub1=1;
   for (int i=0; i<m; ++i) sub1&=u[i]==v[i] || u[i]+1==v[i];
   if (sub1){
      vector<int> ans(n), cyc(n);
      for (int i=0; i<m; ++i) if (u[i]==v[i]) cyc[u[i]]|=1; else cyc[u[i]]|=2;
      for (int i=n-1; i>=0; --i){
         if (cyc[i]==1){
            ans[i]=r[i];
         }else if (cyc[i]==2){
            ans[i]=ans[i+1];
         }else{
            if (a[i]) ans[i]=r[i] || ans[i+1];
            else ans[i]=r[i] && ans[i+1];
         }
      }
      return ans;
   }
   for (int i=0; i<m; ++i) g[u[i]].push_back(v[i]);
   for (int i=0; i<n; ++i) bfs(i);
   vector<int> ans(n);
   for (int i=0; i<n; ++i){
      for (int j=0; j<n; ++j) if (r[j]) ans[i]|=d[i][j] && d[j][j];
   }
   // for (int i=0; i<n; ++i) g[i].clear();
   // for (int i=0; i<n; ++i) for (int j=0; j<n; ++j) d[i][j]=0;
   return ans;
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 10
• Subtask 3: 11 / 11
• Subtask 4: 0 / 11
• Subtask 5: 0 / 12
• Subtask 6: 0 / 51