Submission #998420

#	Time	Username	Problem	Language	Result	Execution time	Memory
998420		pedroslrey	Coins (IOI17_coins)	C++14	100 / 100	9 ms	1952 KiB

coins

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

using namespace std;

vector<int> coin_flips(vector<int> bs, int c) {
	int n = bs.size();
	int x = 0;
	for (int i = 0; i < n; ++i)
		if (bs[i]) x ^= i;

	x ^= c;

	return {x};
}

int find_coin(vector<int> bs) {
	int n = bs.size();
	
	int x = 0;
	for (int i = 0; i < n; ++i)
		if (bs[i]) x ^= i;

	return x;
}

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