Compilare: user.cpp: In function ‘int main()’: user.cpp:142:7: warning: statement has no effect [-Wunused-value] for(si;si>0;si--) ^ user.cpp:35:11: warning: variable ‘c2’ set but not used [-Wunused-but-set-variable] int c1,l1,c2,l2,si=0,sj=0,vx,vy,k,i,j,l9,c9,x,y; ^ user.cpp:45:16: warning: variable ‘nc’ set but not used [-Wunused-but-set-variable] int nrl=0,lg=0,nc; ^