/in/foo.cc: In function 'int check(int, int, int, int, int)':
/in/foo.cc:21:15: warning: unused variable 'fll' [-Wunused-variable]
     bool fl=0,fll=0;
               ^~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:50:20: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
         int mn=0,x,y;
                    ^
/in/foo.cc:50:18: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
         int mn=0,x,y;
                  ^