Compilare: user.cpp: In function ‘int main()’: user.cpp:70:34: warning: division by zero [-Wdiv-by-zero] if(a[i]<a[i-1]) cout << 1/0 << '\n'; ~^~ user.cpp:22:9: warning: unused variable ‘l’ [-Wunused-variable] int l, r; ^ user.cpp:22:12: warning: unused variable ‘r’ [-Wunused-variable] int l, r; ^ user.cpp:64:34: warning: ‘index’ may be used uninitialized in this function [-Wmaybe-uninitialized] cout << index + 1 << " " << i + 1 << '\n'; ^~~