/in/foo.c: In function 'main':
/in/foo.c:24:10: warning: too many arguments for format [-Wformat-extra-args]
   printf("%d\n",x, k);
          ^~~~~~
/in/foo.c:26:10: warning: too many arguments for format [-Wformat-extra-args]
   printf("No Exist\n",x);
          ^~~~~~~~~~~~