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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. #define ll long long int
  4.  
  5. ll dfs(ll n, ll m){
  6.     if(n == 0)  return INT_MAX;
  7.     if(n == m){
  8.         return 0;
  9.     }
  10.     if(n > m) {
  11.         return abs(n-m);
  12.     }
  13.     return 1+min(dfs(2*n,m),dfs(n-1,m));
  14. }
  15.  
  16. int main(){
  17.     ll n, m;
  18.     cin >> n >> m;
  19.     ll ans = dfs(n ,m);
  20.     cout << ans << endl;
  21.     return 0;
  22. }
Success #stdin #stdout 0s 15232KB
comments (?)
stdin 
10 1
stdout 
9
https://ideone.com/zsxZsX
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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