Compilare: main.cpp: In function 'void BFS(int)': main.cpp:28:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[nod].size(); ++ i) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'long long int solve(int, int)': main.cpp:44:22: 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:77:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < D[p].size(); ++ i) ~~^~~~~~~~~~~~~ main.cpp:80:21: warning: unused variable 'vecin' [-Wunused-variable] int vecin = D[p][i]; ^~~~~