Submission #918680

#	Time	Username	Problem	Language	Result	Execution time	Memory
918680		hasanovr	Coins (IOI17_coins)	C++14	100 / 100	9 ms	1860 KiB

coins

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

vector<int> coin_flips(vector<int> a, int c) {
	int x = 0;
	for(int i=0; i<64; i++)
		x ^= a[i] * i;
	vector<int> flips(1);
	flips[0] = c^x;
	return flips;
}

int find_coin(vector<int> a) {
	int ans = 0;
	for(int i=0; i<64; i++)
		ans ^= a[i] * i;
	return ans;
}

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