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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. bool divi(string s, int m)
  5. {
  6.   unsigned int u;
  7.   bitset<32>bits(s);
  8.   u=bits.to_ulong();
  9.  
  10.   if(u%m ==0)
  11.   {
  12.     return true;
  13.   }
  14.   return false;
  15. }
  16.  
  17.  
  18. void rec(string s,int index, int n, int m,int &count)
  19. {
  20.    if(index==n)
  21.    {
  22.      bool check = divi(s,m);
  23.      if(check)
  24.      {
  25.        count++;
  26.      }
  27.      return;
  28.    }
  29.  
  30.    else
  31.    {
  32.       if(s[index]=='_')
  33.       {
  34.         s[index]='0';
  35.         rec(s,index+1,n,m,count);
  36.         s[index]='1';
  37.         rec(s,index+1,n,m,count);
  38.         return;
  39.       }
  40.       else
  41.       {
  42.         rec(s,index+1,n,m,count);
  43.       }
  44.    }
  45.  
  46.    return;
  47. }
  48.  
  49.  
  50. int main()
  51. {
  52.     ios::sync_with_stdio(false);
  53.     cin.tie(NULL);
  54.     cout.tie(NULL);
  55.  
  56.     int T;
  57.     cin >> T;
  58.     while(T--)
  59.     {
  60.         int n,m;
  61.         cin >> n >> m;
  62.         string s;
  63.         cin >> s;
  64.         int count =0;
  65.         rec(s,0,n,m,count);
  66.         cout << count << endl;
  67.     }
  68.  
  69.     return 0;
  70. }
Runtime error #stdin #stdout 4.99s 4896KB
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https://ideone.com/wgIJnV
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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