foo.cc: In function 'int main()':
foo.cc:87:37: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i = 1 ; i <= m ; i++) scanf("%d%d%d",&e[i].u,&e[i].v,&e[i].w) ;
                                ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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":"2020-07-30T10:46:49.420Z","handle":"2020-07-30T10:46:49.420Z","cache_start":"2020-07-30T10:46:49.445Z","read_cases":"2020-07-30T10:46:53.167Z","judge":"2020-07-30T10:46:53.168Z","done":"2020-07-30T10:46:56.185Z"}