Submission #1026760

#	Time	Username	Problem	Language	Result	Execution time	Memory
1026760		radaiosm7	Coins (IOI17_coins)	C++17	100 / 100	7 ms	1700 KiB

coins

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

vector<int> coin_flips(vector<int> b, int c) {
    vector<int> flips;
    int S = 0;

    for (int i=0; i < 64; ++i)
      if (b[i] == 1)
        S ^= i;

    flips.push_back(S^c);
    return flips;
}

int find_coin(vector<int> b) {
    int res = 0;

    for (int i=0; i < 64; ++i)
      if (b[i] == 1)
        res ^= i;

    return res;
}

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