Compilare: main.cpp: In function 'void BFS(int, int*)': main.cpp:31:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int p=0; p<(vec[act]).size(); p++) ~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:62:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int p=0; p<(vec[act]).size(); p++) ~^~~~~~~~~~~~~~~~~~ main.cpp:87:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int p1=0; p1<(vec[acm1]).size(); p1++) ~~^~~~~~~~~~~~~~~~~~~ main.cpp:91:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int p2=0; p2<(vec[acm2]).size(); p2++) ~~^~~~~~~~~~~~~~~~~~~