Compilare: main.cpp: In function 'void dfs(int)': main.cpp:13:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'void dfs_transpus(int)': main.cpp:23:18: 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:71:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<sol[i].size();j++) ~^~~~~~~~~~~~~~