Compilare: main.cpp: In function 'bool bfs()': main.cpp:26:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[p].size();i++){ ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:53:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[100].size();i++){ ~^~~~~~~~~~~~~~ main.cpp:82:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<voluntari.size();i++) ~^~~~~~~~~~~~~~~~~