Submission #927326

#	Time	Username	Problem	Language	Result	Execution time	Memory
927326		velislavgarkov	Prisoner Challenge (IOI22_prison)	C++17	65 / 100	11 ms	1624 KiB

prison

#include "prison.h"
#include <iostream>
#include <vector>
using namespace std;
vector <vector <int> > sol;
int decide(int number, int s) {
    if (number==0) return 1 + ((s & (1<<12)) > 0);
    number--;
    int last, cur, type;
    type=sol[number+1][0];
    last=12-number/2;
    bool l=(s & (1<<last));
    if (number%2!=l) {
        if (number%2>l) return -1-type;
        return -1-!type;
    }
    cur=last-1;
    l=(s & (1<<cur));
    if (cur==0) {
        if (l) return -1-!type;
        return -1-type;
    }
    return 1+(number/2+1)*2+l;
}
vector<vector<int> > devise_strategy(int N) {
    sol.resize(25);
    for (int i=0;i<25;i++) {
        sol[i].resize(N+1);
        if (i==0) sol[i][0]=0;
        else sol[i][0]=((i-1)/2+1)%2;
        for (int j=1;j<=N;j++) {
            sol[i][j]=decide(i,j);
        }
    }
    return sol;
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 55 / 90