
# slower version:

s = input()
for i in range(len(s)):
  if i%2 == 0:
    print(s[i], end = '')


# optimized version of the same code:

s = input()
ans = ''
for i in range(len(s)):
  if i % 2 == 0:
    ans += s[i]
print(ans)



# slower version:

#!usr/bin/env python3

from collections import defaultdict

from collections import deque

from heapq import heappush, heappop

import sys

import math

import bisect

import random

def LI(): return list(map(int, sys.stdin.readline().split()))

def I(): return int(sys.stdin.readline())

def LS():return list(map(list, sys.stdin.readline().split()))

def S(): return list(sys.stdin.readline())[:-1]

def IR(n):

    l = [None for i in range(n)]

    for i in range(n):l[i] = I()

    return l

def LIR(n):

    l = [None for i in range(n)]

    for i in range(n):l[i] = LI()

    return l

def SR(n):

    l = [None for i in range(n)]

    for i in range(n):l[i] = S()

    return l

def LSR(n):

    l = [None for i in range(n)]

    for i in range(n):l[i] = LS()

    return l

sys.setrecursionlimit(1000000)

mod = 1000000007



#A

def A():

    return



#B

def B():

    return



#C

def C():

    return



#D

def D():

    return



#E

def E():

    return



#F

def F():

    a,b,c,X,Y = LI()

    ans = float("inf")

    for z in range(300001):

        if z%2 == 0:

            m = c*z

            x = z//2

            y = z//2

            m += a*max(0,X-x)

            m += b*max(0,Y-y)

            if m < ans:

                ans = m

    print(ans)

    return



#G

def G():

    n = I()

    x = LI()

    f = [(i,x[i]) for i in range(n)]

    f.sort(key = lambda x:x[1])

    g = [(f[i][0],i) for i in range(n)]

    g.sort(key = lambda x:x[0])

    for i in range(n):

        if g[i][1] < n//2:

            print((f[n//2][1]))

        else:

            print((f[n//2-1][1]))

    return



#H

def H():

    return



#I

def I_():

    return



#J

def J():

    return



#Solve

if __name__ == "__main__":

    F()


# optimized version of the same code:

#!usr/bin/env python3

from collections import defaultdict,deque

from heapq import heappush, heappop

from itertools import permutations

import sys

import math

import bisect

def LI(): return [int(x) for x in sys.stdin.readline().split()]

def I(): return int(sys.stdin.readline())

def LS():return [list(x) for x in sys.stdin.readline().split()]

def S():

    res = list(sys.stdin.readline())

    if res[-1] == "\n":

        return res[:-1]

    return res

def IR(n):

    return [I() for i in range(n)]

def LIR(n):

    return [LI() for i in range(n)]

def SR(n):

    return [S() for i in range(n)]

def LSR(n):

    return [LS() for i in range(n)]



sys.setrecursionlimit(1000000)

mod = 1000000007



def solve():

    A,B,C,x,y = LI()

    ans = float("inf")

    for c in range(200001)[::2]:

        a = b = c >> 1

        a = max(0,x-a)

        b = max(0,y-b)

        s = A*a+B*b+C*c

        if s < ans:

            ans = s

    print(ans)

    return



#Solve

if __name__ == "__main__":

    solve()

#!usr/bin/env python3
from collections import defaultdict
from collections import deque
from heapq import heappush, heappop
import sys
import math
import bisect
import random


def LI():
    return list(map(int, sys.stdin.readline().split()))


def I():
    return int(sys.stdin.readline())


def LS():
    return list(map(list, sys.stdin.readline().split()))


def S():
    return list(sys.stdin.readline())[:-1]


def IR(n):
    l = [None for i in range(n)]
    for i in range(n):
        l[i] = I()
    return l


def LIR(n):
    l = [None for i in range(n)]
    for i in range(n):
        l[i] = LI()
    return l


def SR(n):
    l = [None for i in range(n)]
    for i in range(n):
        l[i] = S()
    return l


def LSR(n):
    l = [None for i in range(n)]
    for i in range(n):
        l[i] = LS()
    return l


sys.setrecursionlimit(1000000)
mod = 1000000007
# A
def A():
    return


# B
def B():
    return


# C
def C():
    return


# D
def D():
    return


# E
def E():
    return


# F
def F():
    a, b, c, X, Y = LI()
    ans = float("inf")
    for z in range(300001):
        if z % 2 == 0:
            m = c * z
            x = z // 2
            y = z // 2
            m += a * max(0, X - x)
            m += b * max(0, Y - y)
            if m < ans:
                ans = m
    print(ans)
    return


# G
def G():
    n = I()
    x = LI()
    f = [(i, x[i]) for i in range(n)]
    f.sort(key=lambda x: x[1])
    g = [(f[i][0], i) for i in range(n)]
    g.sort(key=lambda x: x[0])
    for i in range(n):
        if g[i][1] < n // 2:
            print((f[n // 2][1]))
        else:
            print((f[n // 2 - 1][1]))
    return


# H
def H():
    return


# I
def I_():
    return


# J
def J():
    return


# Solve
if __name__ == "__main__":
    F()

#!usr/bin/env python3
from collections import defaultdict, deque
from heapq import heappush, heappop
from itertools import permutations
import sys
import math
import bisect


def LI():
    return [int(x) for x in sys.stdin.readline().split()]


def I():
    return int(sys.stdin.readline())


def LS():
    return [list(x) for x in sys.stdin.readline().split()]


def S():
    res = list(sys.stdin.readline())
    if res[-1] == "\n":
        return res[:-1]
    return res


def IR(n):
    return [I() for i in range(n)]


def LIR(n):
    return [LI() for i in range(n)]


def SR(n):
    return [S() for i in range(n)]


def LSR(n):
    return [LS() for i in range(n)]


sys.setrecursionlimit(1000000)
mod = 1000000007


def solve():
    A, B, C, x, y = LI()
    ans = float("inf")
    for c in range(200001)[::2]:
        a = b = c >> 1
        a = max(0, x - a)
        b = max(0, y - b)
        s = A * a + B * b + C * c
        if s < ans:
            ans = s
    print(ans)
    return


# Solve
if __name__ == "__main__":
    solve()

-from collections import defaultdict -from collections import deque +from collections import defaultdict, deque +from itertools import permutations -import random -    return list(map(int, sys.stdin.readline().split())) +    return [int(x) for x in sys.stdin.readline().split()] -    return list(map(list, sys.stdin.readline().split())) +    return [list(x) for x in sys.stdin.readline().split()] -    return list(sys.stdin.readline())[:-1] +    res = list(sys.stdin.readline()) +    if res[-1] == "\n": +        return res[:-1] +    return res -    l = [None for i in range(n)] -    for i in range(n): -        l[i] = I() -    return l +    return [I() for i in range(n)] -    l = [None for i in range(n)] -    for i in range(n): -        l[i] = LI() -    return l +    return [LI() for i in range(n)] -    l = [None for i in range(n)] -    for i in range(n): -        l[i] = S() -    return l +    return [S() for i in range(n)] -    l = [None for i in range(n)] -    for i in range(n): -        l[i] = LS() -    return l +    return [LS() for i in range(n)] -# A -def A(): -    return -# B -def B(): -    return - - -# C -def C(): -    return - - -# D -def D(): -    return - - -# E -def E(): -    return - - -# F -def F(): -    a, b, c, X, Y = LI() +def solve(): +    A, B, C, x, y = LI() -    for z in range(300001): -        if z % 2 == 0: -            m = c * z -            x = z // 2 -            y = z // 2 -            m += a * max(0, X - x) -            m += b * max(0, Y - y) -            if m < ans: -                ans = m +    for c in range(200001)[::2]: +        a = b = c >> 1 +        a = max(0, x - a) +        b = max(0, y - b) +        s = A * a + B * b + C * c +        if s < ans: +            ans = s -    return - - -# G -def G(): -    n = I() -    x = LI() -    f = [(i, x[i]) for i in range(n)] -    f.sort(key=lambda x: x[1]) -    g = [(f[i][0], i) for i in range(n)] -    g.sort(key=lambda x: x[0]) -    for i in range(n): -        if g[i][1] < n // 2: -            print((f[n // 2][1])) -        else: -            print((f[n // 2 - 1][1])) -    return - - -# H -def H(): -    return - - -# I -def I_(): -    return - - -# J -def J(): -    F() +    solve()