Problem:
Score : 200 points

Problem Statement

Takahashi received otoshidama (New Year's money gifts) from N of his relatives.

You are given N values x_1, x_2, ..., x_N and N strings u_1, u_2, ..., u_N as input. Each string u_i is either JPY or BTC, and x_i and u_i represent the content of the otoshidama from the i-th relative.

For example, if x_1 = 10000 and u_1 = JPY, the otoshidama from the first relative is 10000 Japanese yen; if x_2 = 0.10000000 and u_2 = BTC, the otoshidama from the second relative is 0.1 bitcoins.

If we convert the bitcoins into yen at the rate of 380000.0 JPY per 1.0 BTC, how much are the gifts worth in total?

Constraints

2 \leq N \leq 10

u_i = JPY or BTC.

If u_i = JPY, x_i is an integer such that 1 \leq x_i \leq 10^8.

If u_i = BTC, x_i is a decimal with 8 decimal digits, such that 0.00000001 \leq x_i \leq 100.00000000.

Input

Input is given from Standard Input in the following format:

N
x_1 u_1
x_2 u_2
:
x_N u_N

Output

If the gifts are worth Y yen in total, print the value Y (not necessarily an integer).

Output will be judged correct when the absolute or relative error from the judge's output is at most 10^{-5}.

Sample Input 1

2
10000 JPY
0.10000000 BTC

Sample Output 1

48000.0

The otoshidama from the first relative is 10000 yen. The otoshidama from the second relative is 0.1 bitcoins, which is worth 38000.0 yen if converted at the rate of 380000.0 JPY per 1.0 BTC. The sum of these is 48000.0 yen.

Outputs such as 48000 and 48000.1 will also be judged correct.

Sample Input 2

3
100000000 JPY
100.00000000 BTC
0.00000001 BTC

Sample Output 2

138000000.0038

In this case, outputs such as 138001000 and 1.38e8 will also be judged correct.

Solution in Go (1.6) (judge verdict: Accepted)

package main

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

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

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

func init() {
	ReadString = newReadString(os.Stdin)
	stdout = bufio.NewWriter(os.Stdout)
}

func newReadString(ior io.Reader) func() string {
	r := bufio.NewScanner(ior)
	r.Buffer(make([]byte, 1024), int(1e+11))
	// Split sets the split function for the Scanner. The default split function is ScanLines.
	// Split panics if it is called after scanning has started.
	r.Split(bufio.ScanWords)

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

// ReadInt returns an integer.
func ReadInt() int {
	return int(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
}

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

/*********** DP sub-functions ***********/

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

// 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
}

// GetNthBit returns nth bit value of an argument.
// n starts from 0.
func GetNthBit(num, nth int) int {
	return num >> uint(nth) & 1
}

/*********** Arithmetic ***********/

// Max returns the max integer among input set.
// This function needs at least 1 argument (no argument causes panic).
func Max(integers ...int) int {
	m := integers[0]
	for i, integer := range integers {
		if i == 0 {
			continue
		}
		if m < integer {
			m = integer
		}
	}
	return m
}

// Min returns the min integer among input set.
// This function needs at least 1 argument (no argument causes panic).
func Min(integers ...int) int {
	m := integers[0]
	for i, integer := range integers {
		if i == 0 {
			continue
		}
		if m > integer {
			m = integer
		}
	}
	return m
}

// CeilInt returns the minimum integer larger than or equal to float(a/b).
func CeilInt(a, b int) int {
	res := a / b
	if a%b > 0 {
		res++
	}
	return res
}

// FloorInt returns the maximum integer smaller than or equal to float(a/b)
func FloorInt(a, b int) int {
	res := a / b
	return res
}

// PowInt is integer version of math.Pow
// PowInt calculate a power by Binary Power (二分累乗法(O(log e))).
func PowInt(a, e int) int {
	if a < 0 || e < 0 {
		panic(errors.New("[argument error]: PowInt does not accept negative integers"))
	}

	if e == 0 {
		return 1
	}

	if e%2 == 0 {
		halfE := e / 2
		half := PowInt(a, halfE)
		return half * half
	}

	return a * PowInt(a, e-1)
}

// AbsInt is integer version of math.Abs
func AbsInt(a int) int {
	if a < 0 {
		return -a
	}
	return a
}

// Gcd returns the Greatest Common Divisor of two natural numbers.
// Gcd only accepts two natural numbers (a, b >= 1).
// 0 or negative number causes panic.
// Gcd uses the Euclidean Algorithm.
func Gcd(a, b int) int {
	if a <= 0 || b <= 0 {
		panic(errors.New("[argument error]: Gcd only accepts two NATURAL numbers"))
	}
	if a < b {
		a, b = b, a
	}

	// Euclidean Algorithm
	for b > 0 {
		div := a % b
		a, b = b, div
	}

	return a
}

// Lcm returns the Least Common Multiple of two natural numbers.
// Lcd only accepts two natural numbers (a, b >= 1).
// 0 or negative number causes panic.
// Lcd uses the Euclidean Algorithm indirectly.
func Lcm(a, b int) int {
	if a <= 0 || b <= 0 {
		panic(errors.New("[argument error]: Gcd only accepts two NATURAL numbers"))
	}

	// a = a'*gcd, b = b'*gcd, a*b = a'*b'*gcd^2
	// a' and b' are relatively prime numbers
	// gcd consists of prime numbers, that are included in a and b
	gcd := Gcd(a, b)

	// not (a * b / gcd), because of reducing a probability of overflow
	return (a / gcd) * b
}

/*********** Utilities ***********/

// DeleteElement returns a *NEW* slice, that have the same and minimum length and capacity.
// DeleteElement makes a new slice by using easy slice literal.
func DeleteElement(s []int, i int) []int {
	if i < 0 || len(s) <= i {
		panic(errors.New("[index error]"))
	}
	// appendのみの実装
	n := make([]int, 0, len(s)-1)
	n = append(n, s[:i]...)
	n = append(n, s[i+1:]...)
	return n
}

// Concat returns a *NEW* slice, that have the same and minimum length and capacity.
func Concat(s, t []rune) []rune {
	n := make([]rune, 0, len(s)+len(t))
	n = append(n, s...)
	n = append(n, t...)
	return n
}

// UpperRune is rune version of `strings.ToUpper()`.
func UpperRune(r rune) rune {
	str := strings.ToUpper(string(r))
	return []rune(str)[0]
}

// LowerRune is rune version of `strings.ToLower()`.
func LowerRune(r rune) rune {
	str := strings.ToLower(string(r))
	return []rune(str)[0]
}

// ToggleRune returns a upper case if an input is a lower case, v.v.
func ToggleRune(r rune) rune {
	var str string
	if 'a' <= r && r <= 'z' {
		str = strings.ToUpper(string(r))
	} else if 'A' <= r && r <= 'Z' {
		str = strings.ToLower(string(r))
	} else {
		str = string(r)
	}
	return []rune(str)[0]
}

// ToggleString iteratively calls ToggleRune, and returns the toggled string.
func ToggleString(s string) string {
	inputRunes := []rune(s)
	outputRunes := make([]rune, 0, len(inputRunes))
	for _, r := range inputRunes {
		outputRunes = append(outputRunes, ToggleRune(r))
	}
	return string(outputRunes)
}

// 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
	}
}

/*********** Permutation ***********/

// memo: 10! == 3628800 > 3M
func CalcFactorialPatterns(elements []rune) [][]rune {
	copiedResidual := make([]rune, len(elements))
	copy(copiedResidual, elements)
	return factorialRecursion([]rune{}, copiedResidual)
}
func factorialRecursion(interim, residual []rune) [][]rune {
	if len(residual) == 0 {
		return [][]rune{interim}
	}

	res := [][]rune{}
	for idx, elem := range residual {
		copiedInterim := make([]rune, len(interim))
		copy(copiedInterim, interim)
		copiedInterim = append(copiedInterim, elem)
		copiedResidual := genDeletedSlice(idx, residual)
		res = append(res, factorialRecursion(copiedInterim, copiedResidual)...)
	}

	return res
}
func genDeletedSlice(delId int, S []rune) []rune {
	res := []rune{}
	res = append(res, S[:delId]...)
	res = append(res, S[delId+1:]...)
	return res
}

// memo: 3**10 == 59049
func CalcDuplicatePatterns(elements []rune, digit int) [][]rune {
	return duplicateRecursion([]rune{}, elements, digit)
}
func duplicateRecursion(interim, elements []rune, digit int) [][]rune {
	if len(interim) == digit {
		return [][]rune{interim}
	}

	res := [][]rune{}
	for i := 0; i < len(elements); i++ {
		copiedInterim := make([]rune, len(interim))
		copy(copiedInterim, interim)
		copiedInterim = append(copiedInterim, elements[i])
		res = append(res, duplicateRecursion(copiedInterim, elements, digit)...)
	}

	return res
}

// usage
//tmp := CalcFactorialPatterns([]rune{'a', 'b', 'c'})
//expected := []string{"abc", "acb", "bac", "bca", "cab", "cba"}
//tmp := CalcDuplicatePatterns([]rune{'a', 'b', 'c'}, 3)
//expected := []string{"aaa", "aab", "aac", "aba", "abb", "abc", ...}

/*********** Binary Search ***********/

// LowerBound returns an index of a slice whose value(s[idx]) is EQUAL TO AND LARGER THAN A KEY.
// The idx is the most left one when there are many keys.
// In other words, the idx is the point where the argument key should be inserted.
func LowerBound(s []int, key int) int {
	isLargerAndEqual := func(index, key int) bool {
		if s[index] >= key {
			return true
		}
		return false
	}

	left, right := -1, len(s)

	for right-left > 1 {
		mid := left + (right-left)/2
		if isLargerAndEqual(mid, key) {
			right = mid
		} else {
			left = mid
		}
	}

	return right
}

// UpperBound returns an index of a slice whose value(s[idx]) is LARGER THAN A KEY.
// The idx is the most right one when there are many keys.
// In other words, the idx is the point where the argument key should be inserted.
func UpperBound(s []int, key int) int {
	isLarger := func(index, key int) bool {
		if s[index] > key {
			return true
		}
		return false
	}

	left, right := -1, len(s)

	for right-left > 1 {
		mid := left + (right-left)/2
		if isLarger(mid, key) {
			right = mid
		} else {
			left = mid
		}
	}

	return right
}

// usage
//test := []int{1, 2, 2, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5, 10, 10, 10, 20, 20, 20, 30, 30, 30}
//assert.Equal(t, 5, UpperBound(test, 5)-LowerBound(test, 5))
//assert.Equal(t, 0, UpperBound(test, 15)-LowerBound(test, 15))

/*********** Union Find ***********/

func InitParents(parents []int, maxNodeId int) {
	for i := 0; i <= maxNodeId; i++ {
		parents[i] = i
	}
}

func unite(x, y int, parents []int) {
	xp, yp := root(x, parents), root(y, parents)
	if xp == yp {
		return
	}

	parents[xp] = yp
}

func same(x, y int, parents []int) bool {
	return root(x, parents) == root(y, parents)
}

func root(x int, parents []int) int {
	if parents[x] == x {
		return x
	}

	parents[x] = root(parents[x], parents)
	return parents[x]
}

/*********** Factorization, Prime Number ***********/

// TrialDivision returns the result of prime factorization of integer N.
// Complicity: O(n)
func TrialDivision(n int) map[int]int {
	if n <= 1 {
		panic(errors.New("[argument error]: TrialDivision only accepts a NATURAL number"))
	}

	p := map[int]int{}
	for i := 2; i*i <= n; i++ {
		exp := 0
		for n%i == 0 {
			exp++
			n /= i
		}

		if exp == 0 {
			continue
		}
		p[i] = exp
	}
	if n > 1 {
		p[n] = 1
	}

	return p
}

// IsPrime judges whether an argument integer is a prime number or not.
func IsPrime(n int) bool {
	if n == 1 {
		return false
	}

	for i := 2; i*i <= n; i++ {
		if n%i == 0 {
			return false
		}
	}

	return true
}

/*********** Inverse Element ***********/

// CalcNegativeMod can calculate a right residual whether value is positive or negative.
func CalcNegativeMod(val, m int) int {
	res := val % m
	if res < 0 {
		res += m
	}
	return res
}

func modpow(a, e, m int) int {
	if e == 0 {
		return 1
	}

	if e%2 == 0 {
		halfE := e / 2
		half := modpow(a, halfE, m)
		return half * half % m
	}

	return a * modpow(a, e-1, m) % m
}

// CalcModInv returns $a^{-1} mod m$ by Fermat's little theorem.
func CalcModInv(a, m int) int {
	return modpow(a, m-2, m)
}

/********** sort package (snippets) **********/
//sort.Sort(sort.IntSlice(s))
//sort.Sort(sort.Reverse(sort.IntSlice(s)))
//sort.Sort(sort.Float64Slice(s))
//sort.Sort(sort.StringSlice(s))

// struct sort
type Mono struct {
	key, value int
}
type MonoList []*Mono

func (ml MonoList) Len() int {
	return len(ml)
}
func (ml MonoList) Swap(i, j int) {
	ml[i], ml[j] = ml[j], ml[i]
}
func (ml MonoList) Less(i, j int) bool {
	return ml[i].value < ml[j].value
}

// Example(ABC111::C)
//oddCountList, evenCountList := make(MonoList, 1e5+1), make(MonoList, 1e5+1)
//for i := 0; i <= 1e5; i++ {
//	oddCountList[i] = &Mono{key: i, value: oddMemo[i]}
//	evenCountList[i] = &Mono{key: i, value: evenMemo[i]}
//}
//sort.Sort(sort.Reverse(oddCountList))		// DESC sort
//sort.Sort(sort.Reverse(evenCountList))	// DESC sort

/********** copy function (snippets) **********/
//a = []int{0, 1, 2}
//b = make([]int, len(a))
//copy(b, a)

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

//str := ReadString()
//i := ReadInt()
//X := ReadIntSlice(n)
//S := ReadRuneSlice()

/********** String Split **********/

//strs := strings.Split(string(runeSlice), "+")

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

const MOD = 1000000000 + 7
const ALPHABET_NUM = 26

var n int

func main() {
	n = ReadInt()

	ans := 0.0
	for i := 0; i < n; i++ {
		x, u := ReadString(), ReadString()
		if u == "JPY" {
			xint, _ := strconv.Atoi(x)
			ans += float64(xint)
		} else {
			xfloat, _ := strconv.ParseFloat(x, 64)
			ans += 380000 * xfloat
		}
	}

	fmt.Println(ans)
}