#!/usr/bin/env python3.8
# %%
import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
import numpy as np


# %%
N, M, K = map(int, readline().split())
A = np.array([0] + read().split(), np.int64)

# %%
dp = np.zeros((N + 2, M + 1), np.int64)
dp[0, 0] = K
dp[1, 0] = K
for sell in range(2, N + 2):
    dp[sell] = dp[sell - 1]
    for buy in range(1, sell):
        x = dp[buy - 1, :-1] + dp[buy - 1, :-1] // A[buy] * (A[sell] - A[buy])
        np.maximum(dp[sell, 1:], x, out=dp[sell, 1:])


# %%
print(dp.max())