Submission #40392

#	Time	Username	Problem	Language	Result	Execution time	Memory
40392		model_code	Coins (IOI17_coins)	C++11	100 / 100	13 ms	1756 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;
}

Compilation message (stderr)

grader.cpp: In function 'void pass2()':
grader.cpp:100:7: warning: unused variable 'secret' [-Wunused-variable]
  // assert(1 == scanf("%s", secret));
       ^~~~~~

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