Submission #1190346

#	Time	Username	Problem	Language	Result	Execution time	Memory
1190346		__Davit__	Coins (IOI17_coins)	C++20	100 / 100	9 ms	584 KiB

coins

#include "coins.h"

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

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

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