/in/foo.cc: In function 'void solve()':
/in/foo.cc:26:12: warning: unused variable 'y4' [-Wunused-variable]
   26 |         ll y4=0,y100=0,y400=0;
      |            ^~
/in/foo.cc:26:17: warning: unused variable 'y100' [-Wunused-variable]
   26 |         ll y4=0,y100=0,y400=0;
      |                 ^~~~
/in/foo.cc:26:24: warning: unused variable 'y400' [-Wunused-variable]
   26 |         ll y4=0,y100=0,y400=0;
      |                        ^~~~