/in/foo.cc: In function 'const long long int read()':
/in/foo.cc:45:17: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   45 |                 if (ch == '-') f = -1; ch = getc();
      |                 ^~
/in/foo.cc:45:40: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   45 |                 if (ch == '-') f = -1; ch = getc();
      |                                        ^~
/in/foo.cc: In function 'int main()':
/in/foo.cc:90:14: warning: 'ans' may be used uninitialized [-Wmaybe-uninitialized]
   90 |         write(ans);
      |         ~~~~~^~~~~
/in/foo.cc:78:28: note: 'ans' was declared here
   78 |         ll l = 1, r = 2e9, ans;
      |                            ^~~