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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	ios_base::sync_with_stdio(0);
  6. 	cin.tie(0);
  7.     int n, m;
  8.     cin >> n >> m;
  9.     int op[n + 1];
  10.     int kr[m];
  11.     for (int i = 0; i < n; i++)
  12.         cin >> op[i];
  13.     op[n] = 0;
  14.     for (int i = 0; i < m; i++)
  15.         cin >> kr[i];
  16.  
  17.  
  18.  
  19.     for (int i = 1; i < n; i++) {
  20.         if (op[i] > op[i - 1])
  21.             op[i] = op[i - 1];
  22.   }
  23.  
  24.     for (int i = 0; i < m; i++) {
  25.         while (n > 0 && op[n - 1] < kr[i]) 
  26.             n--;
  27.         n--;
  28.     }
  29.  
  30.     if (n < 0)
  31.         cout << 0;
  32.     else
  33.         cout << n + 1;
  34.  
  35.     return 0;
  36. }
Success #stdin #stdout 0.01s 5316KB
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stdin
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7 3
5 6 4 3 6 2 3
3 2 5
stdout
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2
https://ideone.com/BjvXPf
language:
C++14 (gcc 8.3)
created:
4 hours ago
visibility:
public

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