/*
URL:
https://atcoder.jp/contests/m-solutions2020/tasks/m_solutions2020_d
*/

package main

import (
	"bufio"
	"errors"
	"fmt"
	"io"
	"math"
	"os"
	"strconv"
)

/********** FAU standard libraries **********/

//fmt.Sprintf("%b\n", 255) 	// binary expression

/********** I/O usage **********/

//str := ReadString()
//i := ReadInt()
//X := ReadIntSlice(n)
//S := ReadRuneSlice()
//a := ReadFloat64()
//A := ReadFloat64Slice(n)

//str := ZeroPaddingRuneSlice(num, 32)
//str := PrintIntsLine(X...)

/*******************************************************************/

const (
	// General purpose
	MOD = 1000000000 + 7
	// MOD          = 998244353
	ALPHABET_NUM = 26
	INF_INT64    = math.MaxInt64
	INF_BIT60    = 1 << 60
	INF_INT32    = math.MaxInt32
	INF_BIT30    = 1 << 30
	NIL          = -1

	// for dijkstra, prim, and so on
	WHITE = 0
	GRAY  = 1
	BLACK = 2
)

func init() {
	// bufio.ScanWords <---> bufio.ScanLines
	ReadString = newReadString(os.Stdin, bufio.ScanWords)
	stdout = bufio.NewWriter(os.Stdout)
}

var (
	n int
	A []int

	// dp [80 + 5][200000]int
	// dp [80 + 5][2000 + 50][20 + 5]bool
	dp [80 + 5]int
)

func main() {
	n = ReadInt()
	A = ReadIntSlice(n)

	dp[0] = 1000
	for i := 1; i < n; i++ {
		dp[i] = dp[i-1]

		num := dp[i-1] / A[i-1]
		nokori := dp[i-1] % A[i-1]

		ChMax(&dp[i], nokori+num*A[i])
	}

	fmt.Println(dp[n-1])
}

// func main() {
// 	n = ReadInt()
// 	A = ReadIntSlice(n)

// 	for i := 0; i <= n; i++ {
// 		for j := 0; j <= 2000; j++ {
// 			for k := 0; k <= 20; k++ {
// 				dp[i][j][k] = false
// 			}
// 		}
// 	}

// 	dp[0][1000][0] = true
// 	for i := 0; i < n; i++ {
// 		a := A[i]
// 		for j := 0; j <= 2000; j++ {
// 			for k := 0; k <= 20; k++ {
// 				if !dp[i][j][k] {
// 					continue
// 				}

// 				// 何もしない
// 				dp[i+1][j][k] = true

// 				// k枚の株券を換金
// 				for l := 1; l <= k; l++ {
// 					if j+l*a <= 2000 {
// 						dp[i+1][j+l*a][k-l] = true
// 					}
// 				}

// 				// j円を株券に変換
// 				q := j / a
// 				for l := 1; l <= q; l++ {
// 					if k+l <= 20 {
// 						dp[i+1][j-l*a][k+l] = true
// 					}
// 				}
// 			}
// 		}
// 	}

// 	ans := 1000
// 	for j := 1000; j <= 2000; j++ {
// 		for k := 0; k <= 20; k++ {
// 			if dp[n][j][k] {
// 				ChMax(&ans, j)
// 			}
// 		}
// 	}
// 	fmt.Println(ans)
// }

// func main() {
// 	n = ReadInt()
// 	A = ReadIntSlice(n)

// 	for i := 0; i <= n; i++ {
// 		for j := 0; j <= 100000; j++ {
// 			dp[i][j] = -INF_BIT60
// 		}
// 	}

// 	dp[0][0] = 1000
// 	for i := 0; i < n; i++ {
// 		a := A[i]
// 		for j := 0; j <= 10000; j++ {
// 			// dp[i][j]で株を買えるだけ
// 			if dp[i][j] > 0 {
// 				num := dp[i][j] / a
// 				nokori := dp[i][j] % a
// 				ChMax(&dp[i+1][j+num], nokori)
// 			}

// 			// 持ってる株j個をすべて売る
// 			plus := j * a
// 			ChMax(&dp[i+1][0], dp[i][j]+plus)

// 			// 何もしない
// 			ChMax(&dp[i+1][j], dp[i][j])
// 		}
// 	}

// 	ans := 1000
// 	for j := 0; j <= 100000; j++ {
// 		ChMax(&ans, dp[n][j])
// 	}
// 	fmt.Println(ans)
// }

// ChMax accepts a pointer of integer and a target value.
// If target value is LARGER than the first argument,
//	then the first argument will be updated by the second argument.
func ChMax(updatedValue *int, target int) bool {
	if *updatedValue < target {
		*updatedValue = target
		return true
	}
	return false
}

/*******************************************************************/

/*********** I/O ***********/

var (
	// ReadString returns a WORD string.
	ReadString func() string
	stdout     *bufio.Writer
)

func newReadString(ior io.Reader, sf bufio.SplitFunc) func() string {
	r := bufio.NewScanner(ior)
	r.Buffer(make([]byte, 1024), int(1e+9)) // for Codeforces
	r.Split(sf)

	return func() string {
		if !r.Scan() {
			panic("Scan failed")
		}
		return r.Text()
	}
}

// ReadInt returns an integer.
func ReadInt() int {
	return int(readInt64())
}
func ReadInt2() (int, int) {
	return int(readInt64()), int(readInt64())
}
func ReadInt3() (int, int, int) {
	return int(readInt64()), int(readInt64()), int(readInt64())
}
func ReadInt4() (int, int, int, int) {
	return int(readInt64()), int(readInt64()), int(readInt64()), int(readInt64())
}

// ReadInt64 returns as integer as int64.
func ReadInt64() int64 {
	return readInt64()
}
func ReadInt64_2() (int64, int64) {
	return readInt64(), readInt64()
}
func ReadInt64_3() (int64, int64, int64) {
	return readInt64(), readInt64(), readInt64()
}
func ReadInt64_4() (int64, int64, int64, int64) {
	return readInt64(), readInt64(), readInt64(), readInt64()
}

func readInt64() int64 {
	i, err := strconv.ParseInt(ReadString(), 0, 64)
	if err != nil {
		panic(err.Error())
	}
	return i
}

// ReadIntSlice returns an integer slice that has n integers.
func ReadIntSlice(n int) []int {
	b := make([]int, n)
	for i := 0; i < n; i++ {
		b[i] = ReadInt()
	}
	return b
}

// ReadInt64Slice returns as int64 slice that has n integers.
func ReadInt64Slice(n int) []int64 {
	b := make([]int64, n)
	for i := 0; i < n; i++ {
		b[i] = ReadInt64()
	}
	return b
}

// ReadFloat64 returns an float64.
func ReadFloat64() float64 {
	return float64(readFloat64())
}

func readFloat64() float64 {
	f, err := strconv.ParseFloat(ReadString(), 64)
	if err != nil {
		panic(err.Error())
	}
	return f
}

// ReadFloatSlice returns an float64 slice that has n float64.
func ReadFloat64Slice(n int) []float64 {
	b := make([]float64, n)
	for i := 0; i < n; i++ {
		b[i] = ReadFloat64()
	}
	return b
}

// ReadRuneSlice returns a rune slice.
func ReadRuneSlice() []rune {
	return []rune(ReadString())
}

/*********** Debugging ***********/

// ZeroPaddingRuneSlice returns binary expressions of integer n with zero padding.
// For debugging use.
func ZeroPaddingRuneSlice(n, digitsNum int) []rune {
	sn := fmt.Sprintf("%b", n)

	residualLength := digitsNum - len(sn)
	if residualLength <= 0 {
		return []rune(sn)
	}

	zeros := make([]rune, residualLength)
	for i := 0; i < len(zeros); i++ {
		zeros[i] = '0'
	}

	res := []rune{}
	res = append(res, zeros...)
	res = append(res, []rune(sn)...)

	return res
}

// Strtoi is a wrapper of strconv.Atoi().
// If strconv.Atoi() returns an error, Strtoi calls panic.
func Strtoi(s string) int {
	if i, err := strconv.Atoi(s); err != nil {
		panic(errors.New("[argument error]: Strtoi only accepts integer string"))
	} else {
		return i
	}
}

// PrintIntsLine returns integers string delimited by a space.
func PrintIntsLine(A ...int) string {
	res := []rune{}

	for i := 0; i < len(A); i++ {
		str := strconv.Itoa(A[i])
		res = append(res, []rune(str)...)

		if i != len(A)-1 {
			res = append(res, ' ')
		}
	}

	return string(res)
}

// PrintIntsLine returns integers string delimited by a space.
func PrintInts64Line(A ...int64) string {
	res := []rune{}

	for i := 0; i < len(A); i++ {
		str := strconv.FormatInt(A[i], 10) // 64bit int version
		res = append(res, []rune(str)...)

		if i != len(A)-1 {
			res = append(res, ' ')
		}
	}

	return string(res)
}

// PrintfDebug is wrapper of fmt.Fprintf(os.Stderr, format, a...)
func PrintfDebug(format string, a ...interface{}) {
	fmt.Fprintf(os.Stderr, format, a...)
}

// PrintfBufStdout is function for output strings to buffered os.Stdout.
// You may have to call stdout.Flush() finally.
func PrintfBufStdout(format string, a ...interface{}) {
	fmt.Fprintf(stdout, format, a...)
}


Measured memory_bytes: 1776