foo.cc: In function 'int main()':
foo.cc:7:12: warning: unused variable 'l' [-Wunused-variable]
     uint n,l,r,mid,len=1;for(n=0;scanf("%u",M+n)==1;n++);*Ans=M[n-1];
            ^
foo.cc:7:14: warning: unused variable 'r' [-Wunused-variable]
     uint n,l,r,mid,len=1;for(n=0;scanf("%u",M+n)==1;n++);*Ans=M[n-1];
              ^
foo.cc:7:16: warning: unused variable 'mid' [-Wunused-variable]
     uint n,l,r,mid,len=1;for(n=0;scanf("%u",M+n)==1;n++);*Ans=M[n-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":"2020-08-06T03:15:01.970Z","handle":"2020-08-06T03:15:01.970Z","cache_start":"2020-08-06T03:15:01.977Z","read_cases":"2020-08-06T03:15:02.449Z","judge":"2020-08-06T03:15:02.449Z","done":"2020-08-06T03:15:02.632Z"}