Compilare: user.cpp: In function ‘int main()’: user.cpp:30:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[l].size();j++) ^ user.cpp:51:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[l].size();j++) ^ user.cpp:16:15: warning: unused variable ‘i’ [-Wunused-variable] int n,m,x,i,j,p,y,r,distanta=0; ^ user.cpp:16:17: warning: unused variable ‘j’ [-Wunused-variable] int n,m,x,i,j,p,y,r,distanta=0; ^