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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. bool f (char x)
  5. {
  6. 	return ((x<='9') || (x>='a' && x<='z') || (x>='A' && x<='Z')); //Проверяем является ли символ частью числа или переменной.
  7. }
  8.  
  9. int main()
  10. {
  11. 	char a,b,c;
  12. 	int n=0;
  13. 	a=getchar();
  14. 	b=getchar();
  15. 	while (EOF!=(c=getchar()))
  16. 	{
  17. 		if (f(a)&&f(c)&&(b=='*' || b=='-' || b=='+'))
  18. 		{
  19. 			n++;
  20. 		}
  21. 		a=b;
  22. 		b=c;
  23. 	}
  24. 	cout<<n;
  25. 	return 0;
  26. }
Success #stdin #stdout 0s 3416KB
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https://ideone.com/onMUgn
e-olymp 901
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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