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  1. #include<iostream> 
  2. #include<math.h>
  3. #include<iomanip>
  4. #include <string>
  5. #include<algorithm>
  6.  
  7. using namespace std;
  8.  
  9. void fast()
  10. {
  11.     ios_base::sync_with_stdio(0);
  12.     cin.tie(0);
  13.     cout.tie(0);
  14. }
  15.  
  16. int main()
  17. {
  18.     fast();
  19.  
  20.     int n, k;
  21.     cin >> n>> k;
  22.  
  23.     int arr[100000];
  24.     for (int i = 0;i < n;i++) {
  25.         cin >> arr[i];
  26.     }
  27.  
  28.  
  29.     for (int i = 1;i <= 100000 ;i++) {
  30.         int m=0;
  31.         for (int j = 0;j < n;j++) {
  32.             if (i >= arr[j]) {
  33.                 m++;
  34.             }
  35.        }
  36.         if (k == m) {
  37.             cout << i;
  38.             return 0;
  39.         }
  40.     }
  41.     cout << -1;
  42.  
  43.     return 0;
  44. }
Success #stdin #stdout 0.01s 5324KB
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https://ideone.com/9xksLM
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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