foo.cc: In function 'bool bellmanford()':
foo.cc:31:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for (int k=0;k<g[j].size();k++) {
                          ~^~~~~~~~~~~~

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。