Submission #571347

#	Time	Username	Problem	Language	Result	Execution time	Memory
571347		RandomLB	Coins (IOI17_coins)	C++17	0 / 100	8 ms	1416 KiB

coins

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

vector<int> coin_flips(vector<int> b, int c){
    int xr = 0;
    for (int i = 0; i < 64; i++) if (b[i]) xr ^= i;
    b[c^xr] = 1-b[c^xr];
    return b;
}

int find_coin(vector<int> b){
    int xr = 0;
    for (int i = 0; i < 64; i++) if (b[i]) xr ^= i;
    return xr;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 15
• Subtask 3: 0 / 10
• Subtask 4: 0 / 15
• Subtask 5: 0 / 50