foo.cc: In function 'int main()':
foo.cc:26:35: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
    f[i][j]=max(f[i][j-1],f[i+(1<<j-1)][j-1]);
                                  ~^~

自豪的采用 HydroJudge 进行评测(github.com/hydro-dev/HydroJudge)

{"receive":"2020-08-08T08:24:03.232Z","handle":"2020-08-08T08:24:03.232Z","cache_start":"2020-08-08T08:24:03.239Z","read_cases":"2020-08-08T08:24:03.344Z","judge":"2020-08-08T08:24:03.345Z","done":"2020-08-08T08:24:05.102Z"}