Submission #708151

#	Time	Username	Problem	Language	Result	Execution time	Memory
708151		Patrick	Coins (IOI17_coins)	C++17	100 / 100	11 ms	1676 KiB

coins

#include "coins.h"

std::vector<int> coin_flips(std::vector<int> b, int c) {
    int cur = 0;
    for (int i = 0; i < 64; i++) {
        for (int j = 0; j < 6; j++) {
            if (((i >> j) & 1)) {
                cur ^= b[i] << j;
            }
        }
    }
    return {cur ^ c};
}

int find_coin(std::vector<int> b) {
    int cur = 0;
    for (int i = 0; i < 64; i++) {
        for (int j = 0; j < 6; j++) {
            if (((i >> j) & 1)) {
                cur ^= b[i] << j;
            }
        }
    }
    return cur;
}

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