Submission #859371

#	Time	Username	Problem	Language	Result	Execution time	Memory
859371		multifanblinks	Coins (IOI17_coins)	C++14	100 / 100	8 ms	1892 KiB

coins

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

std::vector<int> coin_flips(std::vector<int> b, int c) {
    std::vector<int> flips(1);

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

    flips[0] = c;

    return flips;
}

int find_coin(std::vector<int> b) {
    int c = 0;
    for (int i = 0; i < 64; ++i)
        if (b[i])
            c ^= i;

    return c;
}

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