import sys; input = sys.stdin.buffer.readline
sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	N, M, K = getlist()
	DP = [[0] * (K + 1) for i in range(N + 1)]
	DP[0][0] = 1
	for i in range(N):
		A = getlist()
		for j in range(K):
			if DP[i][j] == 1:
				for k in range(M):
					if j + A[k] <= K:
						DP[i + 1][j + A[k]] = 1

	ans = INF
	for i in range(K + 1):
		if DP[N][i] == 1:
			ans = K - i

	if ans == INF:
		print(-1)
	else:
		print(ans)


if __name__ == '__main__':
	main()