/in/foo.c:1:9: error: #include expects "FILENAME" or <FILENAME>
 #include
         ^
/in/foo.c:3:1: warning: return type defaults to 'int' [-Wimplicit-int]
 main()
 ^~~~
/in/foo.c: In function 'main':
/in/foo.c:9:1: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
 scanf("%d%d",&n,&m);
 ^~~~~
/in/foo.c:9:1: warning: incompatible implicit declaration of built-in function 'scanf'
/in/foo.c:9:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
/in/foo.c:29:1: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
 printf("%d",d);
 ^~~~~~
/in/foo.c:29:1: warning: incompatible implicit declaration of built-in function 'printf'
/in/foo.c:29:1: note: include '<stdio.h>' or provide a declaration of 'printf'