Compilare: main.cpp: In function 'void dfs(int)': main.cpp:14:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'void dfs2(int)': main.cpp:26:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v2[nod].size();i++) ~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:67:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k1=0;ok&&k1<sol[i].size();k1++) ~~^~~~~~~~~~~~~~ main.cpp:70:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k2=0;ok&&k2<sol[j].size();k2++) ~~^~~~~~~~~~~~~~ main.cpp:77:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int d=0;d<sol[j].size();d++) ~^~~~~~~~~~~~~~ main.cpp:86:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int d=0;d<sol[j].size();d++) ~^~~~~~~~~~~~~~