Compilare: main.cpp: In function 'void BFS(int)': main.cpp:31:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<nodes[node].size(); i++) ~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void BFS_back(int, int)': main.cpp:44:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<nodes[node].size(); i++) ~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void resolve()': main.cpp:61:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=1; j<nodesApp[i].size(); j++) ~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void write()': main.cpp:72:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<commonVertex.size(); i++) ~^~~~~~~~~~~~~~~~~~~~