Submission #821074

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
821074	2023-08-11 07:20:55	khshg	Coins (IOI17_coins)	C++14	100 / 100	9 ms	1440 KiB

coins

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#include "coins.h"
std::vector<int> coin_flips(std::vector<int> b, int c) {
    std::vector<int> flips(1);
  int x = 0;
  for(int i = 0; i < 64; ++i) {
    x ^= (b[i] ? i : 0);
  }
  flips[0] = (x ^ c);
    return flips;
}
int find_coin(std::vector<int> b) {
  int x = 0;
  for(int i = 0; i < 64; ++i) {
    x ^= (b[i] ? i : 0);
  }
    return x;
}
 
 
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• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 10 / 10
• Subtask 4: 15 / 15
• Subtask 5: 50 / 50