/in/foo.cc: In function 'int main()':
/in/foo.cc:22:9: warning: unused variable 'mi' [-Wunused-variable]
     int mi=0,ma=0,tmp;
         ^~
/in/foo.cc:22:14: warning: unused variable 'ma' [-Wunused-variable]
     int mi=0,ma=0,tmp;
              ^~