Submission #1202149

#	Time	Username	Problem	Language	Result	Execution time	Memory
1202149		dzuizz	Game (APIO22_game)	C++20	0 / 100	2 ms	4928 KiB

game

#include "game.h"
#include <bits/stdc++.h>
using namespace std;

constexpr int N=1e5+5;
vector<int> g[N],tg[N];
int n,k;

void init(int _n, int _k) {
  n=_n,k=_k;

  for(int i=0;i<k-1;++i){
    g[i].emplace_back(i+1);
    tg[i+1].emplace_back(i);
  }
}

int add_teleporter(int u, int v) {
  g[u].emplace_back(v);
  tg[v].emplace_back(u);

  int mini=INT_MAX,maxi=-1;

  // find min goto
  bool vi[n]; memset(vi,0,sizeof vi);
  queue<int> q; q.emplace(v); vi[u]=1;
  while(q.size()){
    int i=q.front(); q.pop();
    if(i<k) mini=min(mini,i);
    for(auto&j:g[i]) if(!vi[j]){
      q.emplace(j); vi[j]=1;
    }
  }

  // find max comefrom
  memset(vi,0,sizeof vi);
  q.emplace(u); vi[u]=1;
  while(q.size()){
    int i=q.front(); q.pop();
    if(i<k) maxi=max(maxi,i);
    for(auto&j:tg[i]) if(!vi[j]){
      q.emplace(j); vi[j]=1;
    }
  }

  //cerr<<mini<<" "<<maxi<<'\n';
  return mini <= maxi;
}

• Subtask 1: 0 / 2
• Subtask 2: 0 / 10
• Subtask 3: 0 / 18
• Subtask 4: 0 / 30
• Subtask 5: 0 / 40