Submission #637475

#	Time	Username	Problem	Language	Result	Execution time	Memory
637475		as111	Coins (IOI17_coins)	C++14	100 / 100	11 ms	1552 KiB

coins

#include "coins.h"
#include <vector>
 
using namespace std;
vector<int> coin_flips(vector<int> b, int c) {
	int A = 0;
	for (int i = 0; i < 64; i++) {
		A = A ^ (i * b[i]);
	}
	vector<int> flips;
	flips.push_back(c ^ A);
	return flips;
}
int find_coin(vector<int> b) {
	int X = 0;
	for (int i = 0; i < 64; i++) {
		X = X ^ (i * b[i]);
	}
	return X;
}

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