Compilare: user.cpp: In function ‘void df2(int)’: user.cpp:22:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<gi[x].size();++i){ ^ user.cpp: In function ‘void df1(int)’: user.cpp:32:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[x].size();++i){ ^ user.cpp: In function ‘void make_graf()’: user.cpp:57:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<compNode[i].size();++j){ ^ user.cpp:59:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0;k<g[act].size();++k){ ^ user.cpp: In function ‘void dfT(int)’: user.cpp:67:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<gc[x].size();++i){ ^ user.cpp: In function ‘int main()’: user.cpp:125:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<gc[act].size();++j){ ^ user.cpp:136:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<gci[act].size();++j){ ^ user.cpp:149:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<compNode[i].size();++j){ ^ user.cpp:156:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<ret.size();++i){ ^