/in/foo.c:1:1: warning: data definition has no type or storage class
 stri=str(input())
 ^~~~
/in/foo.c:1:1: warning: type defaults to 'int' in declaration of 'stri' [-Wimplicit-int]
/in/foo.c:1:6: warning: implicit declaration of function 'str' [-Wimplicit-function-declaration]
 stri=str(input())
      ^~~
/in/foo.c:1:10: warning: implicit declaration of function 'input' [-Wimplicit-function-declaration]
 stri=str(input())
          ^~~~~
/in/foo.c:1:6: error: initializer element is not constant
 stri=str(input())
      ^~~
/in/foo.c:2:1: error: expected ',' or ';' before 'left'
 left=stri.count('(')
 ^~~~