#include<bits/stdc++.h>
using namespace std;

#define ll long long
#define nl "\n"

void files(){
    ios_base::sync_with_stdio(false),cin.tie(NULL),cout.tie(NULL);
    #ifndef ONLINE_JUDGE
        freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout);
    #endif
}


void solve(){
    ll n,a,b; cin>>n>>a>>b;
    vector<ll> v(n);
    for(ll &x: v) cin>>x;

    ll l = 1, r = 1e12, ans = 1e12;

    auto check = [&](ll mid){
        ll sum = 0;
        for(auto x:v){
            if(x <= b*mid) continue;
            ll num = x - b*mid;
            ll den = a - b;
            ll need = (num + den - 1) / den;
            sum += need;
            if(sum > mid) return false;
        }

        return sum <= mid;
    };

    while(l <= r){
        ll mid = l + (r-l)/2;
        if(check(mid)){
            ans = mid;
            r = mid - 1;
        }else l = mid + 1;
    }

    cout<<ans<<nl;
}

int main(){
    files();
    int t = 1;
    //cin>>t;
    while(t--) solve();

    return 0;
}