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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int n, t;
  5. int a[100];
  6. bool final = false;
  7.  
  8. void ktao() {
  9.     for (int i = 1; i <= n; i++)
  10.         a[i] = 0;
  11. }
  12.  
  13. void sinh() {
  14.     int i = n;
  15.     while (i >= 1 && a[i] == 1) {
  16.         a[i] = 0;
  17.         i--;
  18.     }
  19.  
  20.     if (i == 0)
  21.         final = true;
  22.     else
  23.         a[i] = 1;
  24. }
  25.  
  26. bool check() {
  27.     int dem = 0;
  28.  
  29.     for (int i = 1; i <= n; i++)
  30.         dem += a[i];
  31.  
  32.     return dem == t;
  33. }
  34.  
  35. int main() {
  36.     cin >> n >> t;
  37.  
  38.     ktao();
  39.  
  40.     int cnt = 0;
  41.  
  42.     while (!final) {
  43.         if (check())
  44.             cnt++;
  45.  
  46.         sinh();
  47.     }
  48.  
  49.     cout << cnt;
  50. }
Success #stdin #stdout 0s 5312KB
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https://ideone.com/82PjQH
language:
C++ (gcc 8.3)
created:
3 days ago
visibility:
public

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