Submission #638310

#	Time	Username	Problem	Language	Result	Execution time	Memory
638310		Fidan	Prisoner Challenge (IOI22_prison)	C++17	0 / 100	6 ms	596 KiB

prison

#include <bits/stdc++.h>
#include "prison.h"
using namespace std;
typedef int ll;
ll pw[8]={1, 3, 9, 27, 81, 243, 729, 2187};
vector<vector<ll>> devise_strategy(ll n){
	vector<vector<ll>> v(23, vector<ll> (n+1));
	for(ll i=0; i<23; i++){
		if(((i+1)/3)%2==0) v[i][0]=0;
		else v[i][0]=1;
	}
	for(ll i=1; i<=n; i++){
		v[0][i]=i/pw[7]+20;
	}
	for(ll i=8; i<23; i++){
		for(ll j=1; j<=n; j++){
			ll k=(i+1)/3, bit=(i+1)%3;
			ll bj=(j/pw[k])%3;
			if(bj==bit){
				v[i][j]=(j/pw[k-1])%3+3*k-4;
			}
			else if(bj>bit){
				if(k%2==0) v[i][j]=-1;
				else v[i][j]=-2;
			}
			else{
				if(k%2==0) v[i][j]=-2;
				else v[i][j]=-1;
			}
		}
	}
	for(ll i=5; i<8; i++){
		for(ll j=1; j<=n; j++){
			ll k=(i+1)/3, bit=(i+1)%3;
			ll bj=(j/pw[k])%3;
			if(bj==bit){
				if(j%9==0) v[i][j]=-1;
				else if(j%9==8) v[i][j]=-2;
				else if(j%9<=2) v[i][j]=1;
				else if(j%9<=4) v[i][j]=2;
				else if(j%9<=6) v[i][j]=3;
				else v[i][j]=4;
			}
			else if(bj>bit){
				v[i][j]=-2;
			}
			else{
				v[i][j]=-1;
			}
		}
	}
	for(ll i=1; i<=4; i++){
		for(ll j=1; j<=n; j++){
			if(j%9<=2*i-1) v[i][j]=-2;
			else if(j%9>=2*i) v[i][j]=-1;
		}
	}
	for(ll i=0; i<22; i++){
		v[i][1]=-v[i][0]-1;
		v[i][n]=v[i][0]-2;
	}
	return v;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 5
• Subtask 3: 0 / 90