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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define ll long long
  4. const int mod = 1e9 + 7;
  5.  
  6. ll n, k;
  7. ll F[55];
  8.  
  9. int Try(ll n, ll k){
  10.     if(k == (F[n] + 1) / 2 ){
  11.         return n;
  12.     }
  13.     if(k <= F[n - 1]){
  14.         return Try(n - 1, k);
  15.     }
  16.     else{
  17.         return Try(n - 1, k - F[n - 1] - 1);
  18.     }
  19. }
  20.  
  21. int main(){
  22.     int t; cin >> t;
  23.     F[0] = 0;
  24.     for(int i = 1; i <= 50; i++){
  25.         F[i] = F[i - 1] * 2 + 1;
  26.     }
  27.     while(t--){
  28.         cin >> n >> k;
  29.         cout << Try(n, k) << endl;
  30.     }
  31. }
  32.  
Success #stdin #stdout 0.02s 5280KB
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https://ideone.com/5pinHX
language:
C++ (gcc 8.3)
created:
13 days ago
visibility:
public

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