Submission #1112811

#	Time	Username	Problem	Language	Result	Execution time	Memory
1112811		julia_08	Coins (IOI17_coins)	C++17	100 / 100	11 ms	1516 KiB

coins

#include "coins.h"
#include <bits/stdc++.h>
using namespace std;

vector<int> coin_flips(vector<int> b, int c){
  vector<int> flips;

  int x = 0;

  int pos = 0;

  for(int i=0; i<(int) b.size(); i++){
    if(b[i] == 1) x ^= pos;

    pos ++;
  }

  flips.push_back(x ^ c);

  return flips;
}

int find_coin(vector<int> b){

  int coin = 0;

  int pos = 0;

  for(int i=0; i<(int) b.size(); i++){
    if(b[i] == 1) coin ^= pos;

    pos ++;
  }

  return coin;
}

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