foo.cc: In function 'int main()':
foo.cc:21:8: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout<<b<<endl;
        ^

正在同步测试数据，请稍后
自豪的采用HydroJudge(https://github.com/hydro-dev/Hydro)进行评测。