Submission #675410

#	Time	Username	Problem	Language	Result	Execution time	Memory
675410		m23022002	Coins (IOI17_coins)	C++14	100 / 100	9 ms	1544 KiB

coins

#include "coins.h"
#include <vector>
using namespace std;
 
vector<int> coin_flips(vector<int> b, int c) {
	int x = 0;
	for(int i = 0; i < 64; ++ i)
		x ^= b[i] * i;
	vector<int> flips(1);
	flips[0] = c ^ x;
	return flips;
}
 
int find_coin(vector<int> b) {
	int x = 0;
	for(int i = 0; i < 64; ++ i)
		x ^= b[i] * i;
	return x;
}

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