N,K,M = map(int, input().split())
A = [int(a) for a in input().split()]

S = [0]*(N+1)
for i in range(N):
    S[i+1] = S[i]+abs(A[i])
S2 = [0]*(N+1)
for i in range(N):
    S2[i+1] = S2[i]+A[i]

memo = {}
def f(l, r, n):
    if n*M < N-r-1:
        return 0
    if (l, r, n) in memo:
        return memo[(l, r, n)]
    res = abs(S2[r+1]-S2[l])
    temp = 0
    for i in range(r+1, min(N-n+1, r+1+M, N)):
        temp = max(temp, f(r+1, i, n-1))
    memo[(l, r, n)] = res+temp
    return res+temp

ans = 0
for r in range(M):
    ans = max(ans, f(0, r, K-1))
print(ans)