foo.cc: In function 'int main()':
foo.cc:91:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
         mid=L+R>>1;
             ~^~

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

正在同步测试数据，请稍后
{"receive":"2020-07-17T06:11:15.931Z","handle":"2020-07-17T06:11:15.949Z","cache_start":"2020-07-17T06:11:16.058Z","read_cases":"2020-07-17T06:11:16.938Z","judge":"2020-07-17T06:11:16.949Z","done":"2020-07-17T06:11:22.094Z"}