/in/foo.c:1:1: warning: data definition has no type or storage class
 a,b=map(int,imput().split())
 ^
/in/foo.c:1:1: warning: type defaults to 'int' in declaration of 'a' [-Wimplicit-int]
/in/foo.c:1:3: warning: type defaults to 'int' in declaration of 'b' [-Wimplicit-int]
 a,b=map(int,imput().split())
   ^
/in/foo.c:1:5: warning: implicit declaration of function 'map' [-Wimplicit-function-declaration]
 a,b=map(int,imput().split())
     ^~~
/in/foo.c:1:9: error: expected expression before 'int'
 a,b=map(int,imput().split())
         ^~~
/in/foo.c:2:1: error: expected ',' or ';' before 'print'
 print(a*b/2 )
 ^~~~~