Compilare: user.cpp: In function ‘void df(int)’: user.cpp:30:29: 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_ctc()’: user.cpp:75:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<comp.size();++i){ ^ user.cpp:76:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<comp[i].size();++j){ ^ user.cpp: In function ‘void solve()’: user.cpp:92:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<comp.size();++i){ ^ user.cpp:93:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<comp[i].size();++j){ ^ user.cpp:96:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0;k<g[nod].size();++k){ ^ user.cpp:108:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=comp.size();++i){ ^ user.cpp:119:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<gx[nod].size();++i){ ^ user.cpp:127:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<comp[nod-1].size();++i){ ^