Compilare: user.cpp: In function ‘int main()’: user.cpp:152:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<a[nod].size(); ++i){ ^ user.cpp:173:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<ras.size(); ++i){ ^ user.cpp:117:15: warning: unused variable ‘j’ [-Wunused-variable] int n,m,i,j,x,y,z,s=1,hsiz,nod,vl,to,ln,t; ^ user.cpp:117:36: warning: unused variable ‘vl’ [-Wunused-variable] int n,m,i,j,x,y,z,s=1,hsiz,nod,vl,to,ln,t; ^ user.cpp: In function ‘void dfs()’: user.cpp:203:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<a[x].size(); ++i){ ^