Submission #165632

#	Time	Username	Problem	Language	Result	Execution time	Memory
165632		eriksuenderhauf	Coins (IOI17_coins)	C++11	100 / 100	13 ms	1764 KiB

coins

#include "coins.h"

std::vector<int> coin_flips(std::vector<int> b, int c) {
	int cur = 0;
	for (int i = 0; i < 64; i++)
		if (b[i])
			cur ^= i;
	return {c ^ cur};
}

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

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