Submission #1093379

#	Time	Username	Problem	Language	Result	Execution time	Memory
1093379		Uniq0rn	Coins (IOI17_coins)	C++14	100 / 100	6 ms	1816 KiB

coins

#include "coins.h"
 
std::vector<int> coin_flips(std::vector<int> b, int c) {
  int x = c;
  for(int i = 0;i<b.size();i++)
    x^=(b[i]?i:0);
  return {x};
 
}
 
int find_coin(std::vector<int> b) {
    int x =0;
    for(int i = 0;i<b.size();i++)
      x^=(b[i]?i:0);
    return x;
}

Compilation message (stderr)

coins.cpp: In function 'std::vector<int> coin_flips(std::vector<int>, int)':
coins.cpp:5:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    5 |   for(int i = 0;i<b.size();i++)
      |                 ~^~~~~~~~~
coins.cpp: In function 'int find_coin(std::vector<int>)':
coins.cpp:13:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |     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