Compilare: main.cpp: In function 'bool bfs(int, int)': main.cpp:24:23: warning: suggest parentheses around assignment used as truth value [-Wparentheses] viz[i]=tata[i]=0; ~~~~~~~^~ main.cpp:30:22: 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:93:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[2*n+1].size();i++) ~^~~~~~~~~~~~~~~~