Compilare: main.cpp: In function 'void dfs(int)': main.cpp:22:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<c[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'void dfsnw(int)': main.cpp:33:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<inv[nod].size();i++) ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:74:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<afis[i].size();j++) ~^~~~~~~~~~~~~~~