Submission #829710

#	Time	Username	Problem	Language	Result	Execution time	Memory
829710		bane	Coins (IOI17_coins)	C++17	100 / 100	8 ms	1556 KiB

coins

#include "coins.h"

std::vector<int> coin_flips(std::vector<int> b, int c) {
    
    int pos = 0;
    for (int i = 0; i < (int)b.size(); i++){
        if (b[i])pos ^= i;
    }
    return {c ^ pos};
}

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

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