Submission #530866

#	Time	Username	Problem	Language	Result	Execution time	Memory
530866		KoD	Coins (IOI17_coins)	C++17	100 / 100	12 ms	1608 KiB

coins

#include "coins.h"

using std::vector;

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

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

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