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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int n, k;
  6. 	cin >> n >> k;
  7.  
  8. 	for(int i=0; n < k; ++i) {
  9. 		if(n % 10 == 0){
  10. 			n = n/10;
  11. 		} 
  12. 		else {
  13. 			n--;	
  14. 		}
  15. 	}
  16. 	cout << n << endl;
  17. 	return 0;
  18. }
Success #stdin #stdout 0.01s 5280KB
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512
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stdout
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https://ideone.com/jLeU4J
language:
C++14 (gcc 8.3)
created:
12 days ago
visibility:
public

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