Submission #306237

#	Time	Username	Problem	Language	Result	Execution time	Memory
306237		peuch	Coins (IOI17_coins)	C++17	100 / 100	13 ms	1896 KiB

coins

#include "coins.h"

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

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

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