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

#define INIT ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0)
#define _CRT_SECURE_NO_WARINGS
#define ALL(obj) (obj).begin(),(obj).end()
#define SORT(obj) sort(ALL(obj))
#define rep(i,n) for(int i = 0; i < (n); ++i)

#define coutALL(x) for(auto i=x.begin();i!=--x.end();i++)cout<<*i<<" ";cout<<*--x.end()<<endl;

const int INF = 1e9;
const int MOD = 1e9 + 7;
const long long LINF = 1e18;
const double PI = 3.14159265358979323846;
using ll = long long;
using P = pair<int, int >;
using VI = vector<int>;
using VP = vector<P>;

template<class T>bool chmax(T& a, const T& b) { if (a < b) { a = b; return 1; } return 0; }
template<class T>bool chmin(T& a, const T& b) { if (b < a) { a = b; return 1; } return 0; }

#pragma region vector入出力用

template<typename T>
istream& operator >> (istream& is, vector<T>& vec) {
	for (T& x : vec) is >> x;
	//for(int i=0; i<vec.size(); i++) is >> x[i]; とかでもいいです。
	return is;
}
template<typename T>
ostream& operator << (ostream& os, vector<T>& vec) {
	for (int i = 0; i < vec.size(); i++) {
		os << vec[i] << (i + 1 == vec.size() ? "" : " ");
	}
	return os;
}

#pragma endregion

#pragma region Functions


#pragma endregion

signed main()
{
	INIT; // 必須
	
	int a, b, c, d, e;
	cin >> a >> b >> c >> d >> e;
	int sum{ 0 };
	vector<int> sums;
	rep(i, b-c) {
		if (i == 0) {
			sums.push_back( d*a);
			continue;
		}
		// i >= 1
		if (i % 10 != 0) sums.push_back(sums[i - 1] * a);
		else if (i % 10 == 0 and e <= sums[i - 1]) sums.push_back((sums[i - 1] - e) * a);
		else if (i % 10 == 0 and e > sums[i - 1]) sums.push_back(sums[i - 1] * a);
	}

	sum = accumulate(ALL(sums), 0);
	cout << sum << "\n";

}