// yukicoder: No.664 超能力者Aと株価予測
// 2019.8.21 bal4u

#include <stdio.h>

typedef long long ll;

#if 1
#define gc() getchar_unlocked()
#else
#define gc() getchar()
#endif

int in() { // 非負整数の入力
	int n = 0, c = gc();
	do n = 10 * n + (c & 0xf); while ((c = gc()) >= '0');
	return n;
}

ll dp[25][400];
int a[400];

inline static void chmax(ll *ma, ll x) { if (*ma < x) *ma = x; }
 
int main()
{
	int i, fr, to, N, M, K; ll ans;

	N = in(), M = in(), K = in();
	for (i = 0; i <= N; i++) a[i] = in();
	
	for (i = 0; i <= N; i++) dp[0][i] = K;
	for (i = 1; i <= M; i++) {
		for (to = 1; to <= N; to++) {
			if (a[to-1] < a[to]) {
				for (fr = 0; fr < to; fr++) if (a[fr] < a[to]) {
					chmax(&dp[i][to], dp[i-1][fr]/a[fr]*(a[to]-a[fr]) + dp[i-1][fr]);  // 資金の変化
				}
			}
			chmax(&dp[i][to], dp[i][to-1]);
		}
	}
	ans = 0;
	for (i = 0; i <= M; i++) chmax(&ans, dp[i][N]);
	printf("%lld\n", ans);
	return 0;
}