Submission #1219137

#	Time	Username	Problem	Language	Result	Execution time	Memory
1219137		mariamp1	Coins (IOI17_coins)	C++20	100 / 100	5 ms	768 KiB

coins

#include "coins.h"
#include <vector>
using namespace std;
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 {x ^ c };
}

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

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