/in/foo.cc: In function 'int main()':
/in/foo.cc:30:17: warning: 'xj' may be used uninitialized in this function [-Wmaybe-uninitialized]
   minn[mi]=xi*10+xj;
            ~~~~~^~~
/in/foo.cc:30:14: warning: 'xi' may be used uninitialized in this function [-Wmaybe-uninitialized]
   minn[mi]=xi*10+xj;
            ~~^~~