Compilare: main.cpp: In function 'void read()': main.cpp:20:9: warning: unused variable 'i' [-Wunused-variable] int i, nr; ^ main.cpp:20:12: warning: unused variable 'nr' [-Wunused-variable] int i, nr; ^~ main.cpp: In function 'void dfs(int, int&, int&)': main.cpp:40:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[nod].size(); i++) { ~~^~~~~~~~~~~~~~~ main.cpp:53:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < g[aux.nod].size(); j++) { ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:74:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < g[n1].size(); j++) { ~~^~~~~~~~~~~~~~ main.cpp:76:19: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(aux.nod == i) ^ main.cpp:92:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<vf.size(); i++) { ~^~~~~~~~~~