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  1. #include <iostream>
  2. #include <cstring>
  3. using namespace std;
  4.  
  5. bool f (char x)
  6. {
  7. 	return ((x<='9') || (x>='a' && x<='z') || (x>='A' && x<='Z')); //Проверяем является ли символ частью числа или переменной.
  8. }
  9.  
  10. int main()
  11. {
  12. 	short int k = 0;
  13. 	char s[250];
  14. 	while (cin>>s[k])
  15. 	{
  16. 		k++;
  17. 	}
  18.  
  19. 	char * c = strpbrk (s+1, "+-*");
  20. 	short int n = 0;
  21. 	while (c!=NULL)
  22. 	{
  23. 		if (f(s[c-1 - s]) && f(s[c+1-s])&&(c-s!=k-1))
  24. 		{
  25. 			n++;
  26. 		}
  27. 		s[c-s] = ' ';
  28. 		c = strpbrk (s+1, "+-*");
  29. 	}
  30. 	cout<<n;
  31. 	return 0;
  32. }
Success #stdin #stdout 0s 3464KB
comments (?)
stdin 
2+6*6
stdout 
2
https://ideone.com/Zct8KF
e-olymp 901 c-string
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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