Compilare: main.cpp: In function 'int bfs(int, int)': main.cpp:37:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v.size();i++) harta[v[i].p][v[i].s]+=ret; ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:58:27: warning: 'zjd' may be used uninitialized in this function [-Wmaybe-uninitialized] g<<zid<<' '<<zjd<<' '<<ma+1; ^~~ main.cpp:58:17: warning: 'zid' may be used uninitialized in this function [-Wmaybe-uninitialized] g<<zid<<' '<<zjd<<' '<<ma+1; ^~~