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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5.     long long n;
  6.     cin >> n;
  7.  
  8.     long long steps = 0;
  9.  
  10.     while (n != 1) {
  11.         if (n % 2 == 0) {
  12.             n /= 2;
  13.         } else {
  14.             if (n == 3) {
  15.                 n -= 1;
  16.             } else if (n % 4 == 1) {
  17.                 n -= 1;
  18.             } else {
  19.                 n += 1;
  20.             }
  21.         }
  22.         steps++;
  23.     }
  24.  
  25.     cout << steps;
  26.     return 0;
  27. }
Success #stdin #stdout 0.01s 5316KB
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https://ideone.com/rHRp3y
language:
C++ (gcc 8.3)
created:
5 days ago
visibility:
public

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