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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. int main() {
  6. #ifdef _DEBUG
  7. 	freopen("input.txt", "r", stdin);
  8. //	freopen("output.txt", "w", stdout);
  9. #endif
  10.  
  11. 	int n, k;
  12. 	cin >> n >> k;
  13.  
  14. 	for (int i = 0; i < k; ++i) {
  15. 		if (n % 10 == 0) n /= 10;
  16. 		else n--;
  17. 	}
  18.  
  19. 	cout << n << endl;
  20.  
  21. 	return 0;
  22. }
Success #stdin #stdout 0.01s 5288KB
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stdin
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512
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stdout
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https://ideone.com/d8FmAC
language:
C++14 (gcc 8.3)
created:
12 days ago
visibility:
public

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