# region template
import typing
import sys
import math
import collections
import bisect
import itertools
import heapq
import copy


def ni(): return int(sys.stdin.buffer.readline())
def ns(): return map(int, sys.stdin.buffer.readline().split())
def ns1(): return map(lambda x: int(x)-1, sys.stdin.buffer.readline().split())
def na(): return list(map(int, sys.stdin.buffer.readline().split()))
def na1(): return list(map(lambda x: int(x)-1, sys.stdin.buffer.readline().split()))
def nall(): return list(map(int, sys.stdin.buffer.read().split()))
def flush(): return sys.stdout.flush()
def nic(): return int(sys.stdin.readline())
def nsc(): return map(int, sys.stdin.readline().split())
def nac(): return list(map(int, sys.stdin.readline().split()))
def na1c(): return list(map(lambda x: int(x)-1, sys.stdin.readline().split()))
# endregion


# sys.setrecursionlimit(10**7+1)
inf = 10**20
mod = 10**9+7
# mod = 998244353


def main():
    a, b, c, d, m = ns()
    res = 0
    for i in range(a, b+1):
        for j in range(c, d+1):
            tres = (i+j) % m
            res = max(tres, res)
    print(res)


if __name__ == '__main__':
    main()