fork download
copy 
  1. #include <iostream>
  2. #include <vector>
  3. #include <string>
  4.  
  5. using namespace std;
  6. #define all(v) (v.begin()), (v.end())
  7.  
  8. void fast_io()
  9. {
  10.     ios_base::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);
  11. }
  12.  
  13. bool check_digits(int val, int k){
  14.     int sum = 0;
  15.     bool zero = false;
  16.     while (val > 0){
  17.         if (val%10 > k)
  18.             return false;
  19.         if (val%10 == 0)
  20.             zero = true;
  21.         sum += val%10;
  22.         val /= 10;
  23.     }
  24.     if (sum == k*(k+1)/2 && zero)
  25.         return true;
  26.     else
  27.         return false;
  28. }
  29.  
  30. int main()
  31. {
  32.     fast_io();
  33.     int n, k;
  34.     cin >> n >> k;
  35.  
  36.     int counter = 0;
  37.     for (int i = 0; i < n; i++){
  38.         int val=0;
  39.         cin >> val;
  40.         if (k == 0 && val == 0)
  41.             counter++;
  42.         if (check_digits(val,k) && k > 0)
  43.             counter++;
  44.     }
  45.     cout << counter << endl;
  46. }
Success #stdin #stdout 0.01s 5280KB
comments (?)
stdin
copy 
2 1
1
10
stdout
copy 
1
https://ideone.com/KzI1Fs
language:
C++ (gcc 8.3)
created:
3 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!