Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:23:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[x].size();++i) if(!viz[v[x][i]]) DFS(v[x][i]); ^ user.cpp: In function ‘int main()’: user.cpp:54:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[crt].size();++j) Tmin[crt] = max(Tmin[crt],Tmin[v[crt][j]]+t[v[crt][j]]); ^ user.cpp:55:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[crt].size();++j) Tmax[v[crt][j]] = min(Tmax[v[crt][j]],Tmin[crt]-t[v[crt][j]]); ^