foo.cc: In function 'int check(int)':
foo.cc:54:13: warning: unused variable 'j' [-Wunused-variable]
   54 |         int j=0; int cnt=0; int ans=0;
      |             ^
foo.cc:54:22: warning: unused variable 'cnt' [-Wunused-variable]
   54 |         int j=0; int cnt=0; int ans=0;
      |                      ^~~
foo.cc: In function 'll solve(int)':
foo.cc:77:13: warning: unused variable 'j' [-Wunused-variable]
   77 |         int j=0; int cnt=0; ll ans=0;
      |             ^
foo.cc:77:22: warning: unused variable 'cnt' [-Wunused-variable]
   77 |         int j=0; int cnt=0; ll ans=0;
      |                      ^~~

[Hydro](https://hydro.ac)提供评测服务