Submission #905276

#	Time	Username	Problem	Language	Result	Execution time	Memory
905276		rainboy	Coins (IOI17_coins)	C++17	100 / 100	9 ms	1952 KiB

coins

#include "coins.h"

using namespace std;

typedef vector<int> vi;

const int N = 64;

vi coin_flips(vi aa, int a) {
	for (int i = 0; i < N; i++)
		if (aa[i])
			a ^= i;
	return { a };
}

int find_coin(vi aa) {
	int a = 0;
	for (int i = 0; i < N; i++)
		if (aa[i])
			a ^= i;
	return a;
}

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