/in/foo.c: In function 'main':
/in/foo.c:6:8: warning: too many arguments for format [-Wformat-extra-args]
  scanf("lld lld",&x1,&x2);
        ^~~~~~~~~
/in/foo.c:10:12: warning: too many arguments for format [-Wformat-extra-args]
     printf("lld\n",sum);
            ^~~~~~~
/in/foo.c:11:9: warning: too many arguments for format [-Wformat-extra-args]
  printf("lld\n",y1);
         ^~~~~~~
/in/foo.c:12:9: warning: too many arguments for format [-Wformat-extra-args]
  printf("lld\n",y2);
         ^~~~~~~