Compilare: main.cpp: In function 'void bfs(int, int)': main.cpp:28:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i =0; i<G[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:75:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<sir.size();i++) ~^~~~~~~~~~~ main.cpp:80:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = i; j<sir.size();j++) ~^~~~~~~~~~~ main.cpp:122:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<sir.size();i++) ~^~~~~~~~~~~ main.cpp:127:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = i; j<sir.size();j++) ~^~~~~~~~~~~