Submission #570367

#	Time	Username	Problem	Language	Result	Execution time	Memory
570367		Jomnoi	Coins (IOI17_coins)	C++17	100 / 100	12 ms	1552 KiB

coins

#include <bits/stdc++.h>
#include "coins.h"
using namespace std;

vector <int> coin_flips(vector <int> b, int c) {
    vector <int> flips;

    int X = 0;
    for(int i = 0; i < 64; i++) {
        if(b[i] == 1) {
            X ^= i;
        }
    }

    X ^= c;
    flips.push_back(X);
    return flips;
}

int find_coin(vector <int> b) {
    int C = 0;
    for(int i = 0; i < 64; i++) {
        if(b[i] == 1) {
            C ^= i;
        }
    }
    return C;
}

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