n, m, k = map(int, input().split())
countries = [list(map(int, input().split())) for _ in range(n)]

prev = [False] * (k + 1)
prev[0] = True

for country in countries:
    current = [False] * (k + 1)
    for j in range(k + 1):
        if prev[j]:
            for a in country:
                if j + a <= k:
                    current[j + a] = True
    prev = current

max_total = -1
for j in range(k, -1, -1):
    if prev[j]:
        max_total = j
        break

print(k - max_total if max_total != -1 else -1)