Compilare: user.cpp: In function ‘void calc(long long int)’: user.cpp:18:25: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if(rez[n-1]=-inf){rez[n-1]=a[n]-rez[1]; calc(n-1);} ^ user.cpp: In function ‘void solve()’: user.cpp:30:17: warning: unused variable ‘j’ [-Wunused-variable] long long i,j,sum=0; ^