Submission #1062391

#	Time	Username	Problem	Language	Result	Execution time	Memory
1062391		Malix	Prisoner Challenge (IOI22_prison)	C++17	80 / 100	8 ms	1372 KiB

prison

#include "prison.h"
#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vii;
typedef pair<int,int> pi;
typedef vector<pi> pii;
typedef tuple<int,int,int> tii;
typedef vector<ll> li;
typedef vector<li> lii;
 
#define REP(i,a,b) for(int i=a;i<b;i++)
#define F first
#define S second
#define PB push_back
#define MP make_pair
#define LSOne(s) ((s)&(-s))
 
ll INF=1e18+10;
int inf=1e9+10;
ll M=1e9+7;
 
std::vector<std::vector<int>> devise_strategy(int n) {
  vii tern(5001,vi(10,0));
  int c=1;
  for(int i=8;i>=0;i--){
    int pos=0;
    while(pos<=n){
      REP(j,pos,min(n+1,pos+c))tern[j][i]=0;
      pos+=c;
      REP(j,pos,min(n+1,pos+c))tern[j][i]=1;
      pos+=c;
      REP(j,pos,min(n+1,pos+c))tern[j][i]=2;
      pos+=c;
    }
    c*=3;
  }
  int m=22;
  vii ans(m+1,vi(n+1));
  REP(i,0,m+1){
    if(((i+2)/3)%2==1)ans[i][0]=1;
    else ans[i][0]=0;
  }
  REP(j,1,n+1){
    if(tern[j][1]==0)ans[0][j]=1;
    else if(tern[j][1]==1) ans[0][j]=2;
    else if(tern[j][1]==2) ans[0][j]=3;
  }
  REP(i,1,m){
    if(i%3==1){
      REP(j,1,n+1){
        if(tern[j][(i+2)/3]==2||tern[j][(i+2)/3]==1){
          if(((i+2)/3)%2==1)ans[i][j]=-1;
          else ans[i][j]=-2;
        }
        else{
          if(tern[j][(i+2)/3+1]==0)ans[i][j]=i+3;
          else if(tern[j][(i+2)/3+1]==1)ans[i][j]=i+4;
          else ans[i][j]=i+5;
        }
      }
    }
    else if(i%3==2){
      REP(j,1,n+1){
        if(tern[j][(i+2)/3]==2){
          if(((i+2)/3)%2==1)ans[i][j]=-1;
          else ans[i][j]=-2;
        }
        else if(tern[j][(i+2)/3]==0){
          if(((i+2)/3)%2==1)ans[i][j]=-2;
          else ans[i][j]=-1;
        }
        else{
          if(tern[j][(i+2)/3+1]==0)ans[i][j]=i+2;
          else if(tern[j][(i+2)/3+1]==1)ans[i][j]=i+3;
          else ans[i][j]=i+4;
        }
      }
    }
    else{
      REP(j,1,n+1){
        if(tern[j][(i+2)/3]==0||tern[j][(i+2)/3]==1){
          if(((i+2)/3)%2==1)ans[i][j]=-2;
          else ans[i][j]=-1;
        }
        else{
          if(tern[j][(i+2)/3+1]==0)ans[i][j]=i+1;
          else if(tern[j][(i+2)/3+1]==1)ans[i][j]=i+2;
          else ans[i][j]=i+3;
        }
      }
    }
  }
  REP(i,1,m){
    REP(j,1,n+1){
      if(ans[i][j]==m)ans[i][j]=-2;
      else if(ans[i][j]==m+2)ans[i][j]=-1;
      else if(ans[i][j]==m+1)ans[i][j]=22;
    }
  }
  REP(j,1,n+1){
    if(tern[j][8]==0)ans[22][j]=-1;
    else ans[22][j]=-2;
  }
  // REP(i,0,m+1){
  //   REP(j,0,n+1)cerr<<ans[i][j]<<" ";
  //   cerr<<"\n";
  // }
  return ans;
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 70 / 90