src.c:1:5: error: initializer element is not constant
str=input()
^
src.c:2:5: error: expected ',' or ';' before 'n1'
n1=str[str.find('') 1:]
^
src.c:2:21: error: empty character constant
n1=str[str.find('') 1:]
^
src.c:3:22: error: empty character constant
n2=str[:str.find('')]
^