Submission #950802

#	Time	Username	Problem	Language	Result	Execution time	Memory
950802		Dec0Dedd	Prisoner Challenge (IOI22_prison)	C++17	36.50 / 100	19 ms	1628 KiB

prison

#include <bits/stdc++.h>
#include "prison.h"

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;

const int K = 13;

vector<vector<int>> devise_strategy(int n) {
    vector<vector<int>> res(3*K+1, vector<int>(n+1, 0));

    // 3*i+1 - ith bit in A
    // 3*i+2 - ith bit set in A
    // 3*i+3 - ith bit not set in A

    res[0][0]=0;
    for (int i=1; i<=n; ++i) res[0][i]=3*(K-1)+1;
    for (int i=0; i<=K-1; ++i) {
        int s=3*i+1;

        res[s][0]=0;
        for (int j=1; j<=n; ++j) {
            if (j&(1<<i)) res[s][j]=3*i+2;
            else res[s][j]=3*i+3;
        }

        s=3*i+2;
        res[s][0]=1;
        for (int j=1; j<=n; ++j) {
            if (j&(1<<i)) res[s][j]=3*(i-1)+1;
            else res[s][j]=-2;
        }

        s=3*i+3;
        res[s][0]=1;
        for (int j=1; j<=n; ++j) {
            if (j&(1<<i)) res[s][j]=-1;
            else res[s][j]=3*(i-1)+1;
        }
    }

    //cout<<"size "<<res.size()<<"\n";
    return res;
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 26.5 / 90