In function 'void FastIO::write(T) [with T = long long int]',
    inlined from 'void FastIO::writeln(T) [with T = long long int]' at /in/foo.cc:56:14,
    inlined from 'int main()' at /in/foo.cc:82:9:
/in/foo.cc:46:15: warning: 'cnt' may be used uninitialized [-Wmaybe-uninitialized]
   46 |             x = -x;
      |             ~~^~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:70:12: note: 'cnt' was declared here
   70 |         ll cnt;
      |            ^~~