Submission #331113

#	Time	Username	Problem	Language	Result	Execution time	Memory
331113		Pety	Coins (IOI17_coins)	C++14	100 / 100	17 ms	1840 KiB

coins

#include <bits/stdc++.h>
#include "coins.h"

using namespace std;

vector<int> coin_flips (vector<int> b, int c) {
  vector<int>flep;
  int sum = 0;
  for (int i = 0; i < 64; i++)
    if (b[i])
      sum ^= i;
  flep.push_back(sum ^ c);
  return flep;
}

int find_coin (vector<int> b) {
  int sum = 0;
  for (int i = 0; i < b.size(); i++)
    if (b[i])
      sum ^= i;
  return sum;
}

Compilation message (stderr)

coins.cpp: In function 'int find_coin(std::vector<int>)':
coins.cpp:18:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |   for (int i = 0; i < b.size(); i++)
      |                   ~~^~~~~~~~~~

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