n, k, m = map(int, input().split())
a = list(map(int, input().split()))

ind = 0
summa = 0
q = 0

for i in range(n):
    if i <= k:
        summa += a[i]
    else:
        summa += a[i]
        summa -= a[ind]
        ind += 1

    if i >= k and summa == m:
        print(i - k + 1)
        q = 1
        break

if q == 0:
    print(0)