# coding: utf-8
# Your code here!
N,M,K=map(int,input().split())
l=[]

def saiki(i,money,ans):
    if i==N:
        return money
    temp=l[i]
    t=0
    for item in temp:
        if money-item>=0:
            ans=min(saiki(i+1,money-item,ans),ans)
        else:
            return ans
        t+=1
    
    return ans        

for _ in range(N):
    l.append(list(map(int,input().split())))

a=(saiki(0,K,10**18))
if a==10**18:
    print(-1)
else:
    print(a)