N,M,K = [int(x) for x in input().split()]
cost=[[int(x) for x in input().split()] for _ in range(N)]
dp = [[-1]*(K+1) for _ in range(N+1)]
dp[0][0]=1
for i in range(N):
    for j in range(K+1):
        for k in range(M):
            if dp[i][j]!=-1 and j+cost[i][k]<=K:
                dp[i+1][j+cost[i][k]]=1
ans=-1
for i in range(K+1):
    if dp[N][i]==1:
        ans=i
if ans!=-1:
	print(K-ans)
else:
  print(-1)