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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5.     int n,say=0;
  6.     cin>>n;
  7.     for(int i=1;i<=9;i++)
  8.     {
  9.     	for(int j=0;j<=9;j++)
  10.     	{
  11.     		for(int k=0;k<=9;k++)
  12.     		if((i+j+k)==n)
  13.     		say++;
  14.     	}
  15.     }
  16. cout<<say<<endl;
  17. 	return 0;
  18. }
Success #stdin #stdout 0s 5320KB
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https://ideone.com/BJubPD
language:
C++ (gcc 8.3)
created:
17 hours ago
visibility:
public

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