Language: C++

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

#define ll long long
#define fw(p) for(int w=0;w<(p);w++)
#define fx(p) for(int x=0;x<(p);x++)
#define fy(p) for(int y=0;y<(p);y++)
#define fz(p) for(int z=0;z<(p);z++)
#define fyg(p,g) for(int y=(g);y<(p);y++)
#define fzg(p,g) for(int z=(g);z<(p);z++)
#define ce(d) cout<<d<<endl;
#define vecp(p) int aa;cin>>aa;(p).push_back(aa);
#define vecpl(p) long long aa;cin>>aa;(p).push_back(aa);
#define vecps(p) string aa;cin>>aa;(p).push_back(aa);
#define vecp2(p) cin>>aa;(p).push_back(aa);
#define vecpl2(p) long long a	b;cin>>ab;(p).push_back(ab);
#define vecps2(p) string ab;cin>>ab;(p).push_back(ab);
#define set0(k,n) for(int nn=0;nn<(n);nn++){ (k).push_back(0); }
#define sorts(c) sort((c).begin(),(c).end());
#define reverses(c) reverse((c).begin(),(c).end());
#define vec(b) vector<int> (b);
#define vecl(b) vector<long long> (b);
#define vecs(b) vector<string> (b);
#define vecsize(b,size) vector<int> (b)((size));
#define pb(b,a) (b).push_back((a));
#define doublece(a,b) cout<<(a)<<' '<<(b)<<endl;
#define pairs(s) vector<pair<int,int>> (s);
#define pairsl(s) vector<pair<ll,ll>> (s);
#define pairss(s) vector<pair<string,string>> (s);
#define pairsp(s) int aa,bb;cin>>aa>>bb;(s).push_back(make_pair(aa,bb));
#define pairspl(s) int aa,bb;cin>>aa>>bb;(s).push_back(make_pair(aa,bb));
#define pairsps(s) int aa,bb;cin>>aa>>bb;(s).push_back(make_pair(aa,bb));
#define pairsREV(s) (s).push_back(make_pair(bb,aa));
#define pairslREV(s) (s).push_back(make_pair(bb,aa));
#define pairssREV(s) (s).push_back(make_pair(bb,aa));
#define MOD 1000000007

int main()
{	
	ll N,A,B;
	cin >> N>>A>>B;
	vecl(H);
	fx(N) {
		vecpl(H);
	}
	A -= B;
	ll left = 0, right = 2000000000;
	ll mid;
	fx(50) {
		mid = (left + right) / 2;
		int k = mid;
		fy(N) {
			if (H[y] >mid*B) {
				ll tmp = (H[y] - mid * B);
				k -= (tmp + A - 1) / A;
				//at = mid- k;
			}
		}

		if (k>0) {
			right = mid;
		}
		else {
			left = mid;
		}
	}
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define fw(p) for(int w=0;w<(p);w++)
#define fx(p) for(int x=0;x<(p);x++)
#define fy(p) for(int y=0;y<(p);y++)
#define fz(p) for(int z=0;z<(p);z++)
#define fyg(p,g) for(int y=(g);y<(p);y++)
#define fzg(p,g) for(int z=(g);z<(p);z++)
#define ce(d) cout<<d<<endl;
#define vecp(p) int aa;cin>>aa;(p).push_back(aa);
#define vecpl(p) long long aa;cin>>aa;(p).push_back(aa);
#define vecps(p) string aa;cin>>aa;(p).push_back(aa);
#define vecp2(p) cin>>aa;(p).push_back(aa);
#define vecpl2(p) long long a	b;cin>>ab;(p).push_back(ab);
#define vecps2(p) string ab;cin>>ab;(p).push_back(ab);
#define set0(k,n) for(int nn=0;nn<(n);nn++){ (k).push_back(0); }
#define sorts(c) sort((c).begin(),(c).end());
#define reverses(c) reverse((c).begin(),(c).end());
#define vec(b) vector<int> (b);
#define vecl(b) vector<long long> (b);
#define vecs(b) vector<string> (b);
#define vecsize(b,size) vector<int> (b)((size));
#define pb(b,a) (b).push_back((a));
#define doublece(a,b) cout<<(a)<<' '<<(b)<<endl;
#define pairs(s) vector<pair<int,int>> (s);
#define pairsl(s) vector<pair<ll,ll>> (s);
#define pairss(s) vector<pair<string,string>> (s);
#define pairsp(s) int aa,bb;cin>>aa>>bb;(s).push_back(make_pair(aa,bb));
#define pairspl(s) int aa,bb;cin>>aa>>bb;(s).push_back(make_pair(aa,bb));
#define pairsps(s) int aa,bb;cin>>aa>>bb;(s).push_back(make_pair(aa,bb));
#define pairsREV(s) (s).push_back(make_pair(bb,aa));
#define pairslREV(s) (s).push_back(make_pair(bb,aa));
#define pairssREV(s) (s).push_back(make_pair(bb,aa));
#define MOD 1000000007

int main()
{	
		ll N,A,B;
	cin >> N>>A>>B;
	vecl(H);
	fx(N) {
		vecpl(H);
	}
	A -= B;
	ll left = 0, right = 2000000000;
	ll mid;
	fx(50) {
		mid = (left + right) / 2;
		int k = mid;
		fy(N) {
			if (H[y] >mid*B) {
				ll tmp = (H[y] - mid * B);
				k -= (tmp + A - 1) / A;
				//at = mid- k;
			}
		}

		if (k>=0) {
			right = mid;
		}
		else {
			left = mid;
		}
	}
	right++;
	left++;
	ll k = left;
	fy(N) {
		if (H[y] > left* B) {
			ll tmp = (H[y] - left * B);
			k -= (tmp + A - 1) / A;
		}
	}
	//doublece(left,right)
	if (k>=0) {
		ce(left)
	}
	else {
		ce(right)
	}


    return 0;
}






Compiler output:
a.cc: In function 'int main()':
a.cc:104:9: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
  104 | int main()
      |         ^~
a.cc:104:9: note: remove parentheses to default-initialize a variable
  104 | int main()
      |         ^~
      |         --
a.cc:104:9: note: or replace parentheses with braces to value-initialize a variable
a.cc:105:1: error: a function-definition is not allowed here before '{' token
  105 | {
      | ^
a.cc:152:2: error: expected '}' at end of input
  152 | }
      |  ^
a.cc:39:1: note: to match this '{'
   39 | {
      | ^