foo.c:1:1: warning: data definition has no type or storage class
 n=int(input())
 ^
foo.c:1:1: warning: type defaults to 'int' in declaration of 'n' [-Wimplicit-int]
foo.c:1:3: error: expected expression before 'int'
 n=int(input())
   ^~~
foo.c:3:17: error: stray '\357' in program
 for i in range(1，n-1):
                 ^
foo.c:3:18: error: stray '\274' in program
 for i in range(1，n-1):
                  ^
foo.c:3:19: error: stray '\214' in program
 for i in range(1，n-1):
                   ^

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