// dfmt off
T lread(T=long)(){return readln.chomp.to!T;}T[] lreads(T=long)(long n){return iota(n).map!((_)=>lread!T).array;}
T[] aryread(T=long)(){return readln.split.to!(T[]);}void arywrite(T)(T a){a.map!text.join(' ').writeln;}
void scan(L...)(ref L A){auto l=readln.split;foreach(i,T;L){A[i]=l[i].to!T;}}alias sread=()=>readln.chomp();
void dprint(L...)(lazy L A){debug{auto l=new string[](L.length);static foreach(i,a;A)l[i]=a.text;arywrite(l);}}
static immutable MOD=10^^9+7;alias PQueue(T,alias l="b<a")=BinaryHeap!(Array!T,l);import std;
// dfmt on

void main()
{
    long N, A, B;
    scan(N, A, B);
    A -= B;
    auto H = lreads(N);
    long ok = 10 ^^ 9 + 100;
    long ng = 0;
    bool eval(long x)
    {
        long cnt;
        foreach (i; 0 .. N)
        {
            if (B * x < H[i])
            {
                cnt += (H[i] - B * x + A - 1) / A;
            }
            if (x < cnt)
                return false;
        }
        return true;
    }

    while (1 < ok - ng)
    {
        long m = (ok + ng) / 2;
        if (eval(m))
        {
            ok = m;
        }
        else
        {
            ng = m;
        }
    }
    writeln(ok);
}
