Submission #571348

#	Time	Username	Problem	Language	Result	Execution time	Memory
571348		RandomLB	Coins (IOI17_coins)	C++17	100 / 100	10 ms	1568 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;
    return vector<int>(1, c^xr);
}

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