Submission #1184889

#	Time	Username	Problem	Language	Result	Execution time	Memory
1184889		peteza	Coins (IOI17_coins)	C++20	100 / 100	6 ms	584 KiB

coins

#include "coins.h"

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

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

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