Submission #650127

#	Time	Username	Problem	Language	Result	Execution time	Memory
650127		blue	Coins (IOI17_coins)	C++17	100 / 100	12 ms	1556 KiB

coins

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

using vi = vector<int>;

vi coin_flips(vi b, int c) 
{
    int tot = 0;
    for(int i = 0; i < 64; i++)
        if(b[i])
            tot ^= i;

    int flip = c ^ tot;
    return {flip};
}

int find_coin(vi 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