/in/foo.c: In function 'main':
/in/foo.c:38:12: warning: format '%d' expects argument of type 'int *', but argument 3 has type 'long int *' [-Wformat=]
  scanf("%d%d",&n,&m);
            ^
/in/foo.c: In function 'find':
/in/foo.c:34:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^