/in/foo.cc: In function 'void solve(int, int)':
/in/foo.cc:142:9: warning: 'r' may be used uninitialized in this function [-Wmaybe-uninitialized]
   int l,r;
         ^
/in/foo.cc:142:7: warning: 'l' may be used uninitialized in this function [-Wmaybe-uninitialized]
   int l,r;
       ^