Submission #630259

#	Time	Username	Problem	Language	Result	Execution time	Memory
630259		tugushka	Coins (IOI17_coins)	C++14	100 / 100	11 ms	1564 KiB

coins

#include "coins.h"

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

    int p = s ^ c;
    flips[0] = p;

    return flips;
}

int find_coin(std::vector<int> b) {
    int res = 0;
    for(int i = 0 ; i < 64 ; 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