# Original solution
# -*- coding: utf-8 -*-
"""
http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=0106&lang=jp
"""
import sys


def solve(amount):
    """
    :param amount: ?????\???????????°?????????
    :return: ?????????
    """
    best_price = (amount + 199) // 200 * 380
    for a in range(amount // 200 + 1):
        for b in range(amount // 300 + 1):
            for c in range(amount // 500 + 1):
                for a1 in range(amount // 1000 + 1):
                    for b1 in range(amount // 1200 + 1):
                        for c1 in range(amount // 1500 + 1):
                            if a*200 + b*300 + c*500 + a1*1000 + b1*1200 + c1*1500 == amount:
                                price = a*380 + b*550 + c*850 + a1*1520 + b1*1870 + c1*2244
                                if price < best_price:
                                    best_price = price
    return best_price




def main(args):
    while True:
        amount = int(eval(input()))
        if amount == 0:
            break
        result = solve(amount)
        print(result)



if __name__ == '__main__':
    main(sys.argv[1:])

# Optimized solution
# -*- coding: utf-8 -*-
"""
http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=0106&lang=jp
"""
import sys


def solve(amount):
    """
    :param amount: ?????\???????????°?????????
    :return: ?????????
    """
    best_price = (amount + 199) // 200 * 380
    for a in range(amount // 200 + 1):
        for b in range(amount // 300 + 1):
            for c in range(amount // 500 + 1):
                for a1 in range(amount // 1000 + 1):
                    for b1 in range(amount // 1200 + 1):
                        for c1 in range(amount // 1500 + 1):
                            if a*200 + b*300 + c*500 + a1*1000 + b1*1200 + c1*1500 == amount:
                                price = a*380 + b*550 + c*850 + a1*1520 + b1*1870 + c1*2244
                                if price < best_price:
                                    best_price = price
    return best_price


def solve2(amount):
    """
    ???????¨???????????????¨?????????????????§???
    """
    packages = [(0, 0), (2, 380), (3, 550), (5, 850), (10, 1520), (12, 1870), (15, 2244)] # 1?¢??????????(100g??????)??¨??????????????¢l
    # dp??¨???2?¬??????????????¨?????????????(100g??????)?????????????????¨??§??????packages????¨????
    # 999999...??????INF??¨?????? (phthon 3.5??\??????????????????math.inf????????¨??§??????)
    cart = [[99999999] * (amount//100 + 1) for _ in range(len(packages))]
    for i in range(len(packages)):
        cart[i][0] = 0          #  0g???????????\????????´??????0???????????????

    for i in range(1, len(packages)):
        for j in range(1, len(cart[0])):
            w = packages[i][0]  #  ??????
            p = packages[i][1]  #  ??????
            if j < w:
                cart[i][j] = cart[i-1][j]
            else:
                # ???????????????????????????????????????????????????????????????????????????????¨????
                cart[i][j] = min(cart[i-1][j], cart[i-1][max(0, j-w)]+p, cart[i][max(0, j-w)]+p)
    return cart[-1][-1]


def main(args):
    while True:
        amount = int(eval(input()))
        if amount == 0:
            break
        #result = solve(amount)
        #print(result)
        result = solve2(amount)
        print(result)


if __name__ == '__main__':
    main(sys.argv[1:])