Compilare: user.cpp: In function ‘int main()’: user.cpp:59:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<sol.size();i++) ^ user.cpp:23:21: warning: unused variable ‘j’ [-Wunused-variable] int x,y,z,k=0,i,j,min,max=0,u,w; ^ user.cpp:23:23: warning: unused variable ‘min’ [-Wunused-variable] int x,y,z,k=0,i,j,min,max=0,u,w; ^ user.cpp:23:27: warning: unused variable ‘max’ [-Wunused-variable] int x,y,z,k=0,i,j,min,max=0,u,w; ^