Compilare: main.cpp: In function 'int main()': main.cpp:22:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[1].size();i++) ~^~~~~~~~~~~~ main.cpp: In function 'void dfs(int)': main.cpp:35:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[k].size();i++) ~^~~~~~~~~~~~ main.cpp: In function 'void dfs2(int, int)': main.cpp:54:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[t].size();i++) ~^~~~~~~~~~~~ main.cpp:62:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[k].size();i++) ~^~~~~~~~~~~~