Compilare: main.cpp: In function 'int main()': main.cpp:84:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(z=0;z<lin.size();z++) ~^~~~~~~~~~~ main.cpp:21:13: warning: unused variable 'k' [-Wunused-variable] int i,j,k,n,m,grupe=0,x1,y1,poz1,poz2,z,h,u; ^ main.cpp:129:27: warning: 'u' may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<h-1<<" "<<u-1; ^ main.cpp:129:20: warning: 'h' may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<h-1<<" "<<u-1; ^~~