Compilare: user.cpp: In function ‘int main()’: user.cpp:54:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(m[i][j]>=x[i][j]) ^ user.cpp:8:26: warning: unused variable ‘p’ [-Wunused-variable] unsigned long long n,p,j,i,v,s,d,mij,l,c,picuri=0,pmin=ULLONG_MAX,q,w,sec=0; ^ user.cpp:8:71: warning: unused variable ‘q’ [-Wunused-variable] unsigned long long n,p,j,i,v,s,d,mij,l,c,picuri=0,pmin=ULLONG_MAX,q,w,sec=0; ^ user.cpp:8:73: warning: unused variable ‘w’ [-Wunused-variable] unsigned long long n,p,j,i,v,s,d,mij,l,c,picuri=0,pmin=ULLONG_MAX,q,w,sec=0; ^ user.cpp:39:17: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<poz; ^