foo.cc: In function 'll check(ll)':
foo.cc:54:12: warning: unused variable 'j' [-Wunused-variable]
   54 |         ll j=0; ll cnt=0; ll ans=0;
      |            ^
foo.cc:54:20: warning: unused variable 'cnt' [-Wunused-variable]
   54 |         ll j=0; ll cnt=0; ll ans=0;
      |                    ^~~
foo.cc: In function 'll solve(ll)':
foo.cc:77:12: warning: unused variable 'j' [-Wunused-variable]
   77 |         ll j=0; ll cnt=0; ll ans=0;
      |            ^
foo.cc:77:20: warning: unused variable 'cnt' [-Wunused-variable]
   77 |         ll j=0; ll cnt=0; ll ans=0;
      |                    ^~~

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