Compilare: user.cpp: In function ‘int main()’: user.cpp:9:12: warning: right operand of comma operator has no effect [-Wunused-value] in>>n,p; ^ user.cpp:8:26: warning: ‘n’ is used uninitialized in this function [-Wuninitialized] long long int n,p,n1=n,n2=n-1,n3=n+1; ^ user.cpp:18:34: warning: ‘p’ is used uninitialized in this function [-Wuninitialized] long long int calc = (n1*n2)%p; ^