/in/foo.c: In function 'main':
/in/foo.c:16:13: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long int' [-Wformat=]
    printf("%d ",a[i][j]);
             ^
/in/foo.c: In function 'findnum':
/in/foo.c:24:8: warning: unused variable 'j' [-Wunused-variable]
  int i,j,k=0,x1,x2;
        ^