n, k, m = map(int, input().split())
a = [int(x) for x in input().split()]


res = 0
summ = sum(a[:k+1])
if summ == m:
    res = 1
else:
    for i in range(1, n - k):
        summ += a[i+k]-a[i-1]
        if summ == m:
            res = i + 1
            break
print(res)