Compilare: main.cpp: In function 'int bfs()': main.cpp:22:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<L[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'void flow()': main.cpp:37:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<L[n].size();i++){ ~^~~~~~~~~~~~ main.cpp: In function 'int bfs1()': main.cpp:71:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<L[nod].size();i++){ ~^~~~~~~~~~~~~~