N, M, P = map(int, input().split())
V = list(map(int, input().split()))
mod = 10 ** 9 + 7
ans = 0
P = P * pow(100, mod - 2, mod) % mod
P = pow(P, M, mod)
V.reverse()
for i in range(N):
    ans += V[i]
    ans *= 1 - P
    ans %= mod

print(ans)