Submission #306217

#	Time	Username	Problem	Language	Result	Execution time	Memory
306217		Lawliet	Coins (IOI17_coins)	C++17	100 / 100	12 ms	1652 KiB

coins

#include "coins.h"
#include <bits/stdc++.h>

using namespace std;

std::vector<int> coin_flips(std::vector<int> b, int c) 
{
    int x = 0;

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

    return vector<int>( 1 , x^c );
}

int find_coin(std::vector<int> b) 
{
    int ans = 0;

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

    return ans;
}

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