#include <bits/stdc++.h>
using namespace std;

int main() {
	//入力
	int N,M,K; cin >> N >> M >> K;
	assert(1<=N&&N<=10);
	assert(1<=M&&M<=10);
	assert(1<=K&&K<=500);
	vector<vector<int>> A(N,vector<int>(M));
	for(int i = 0; i < N; ++i) {
		for(int j = 0; j < M; ++j) {
			cin >> A[i][j];
			assert(1 <= A[i][j] && A[i][j] <= 50);
		}
		for(int j = 0; j+1 < M; ++j) {
			assert(A[i][j] < A[i][j+1]);
		}
	}

	//差分計算、O(NM) 
	int sum = 0;
	for(int i = 0; i < N; ++i) {
		int ini = A[i][0];
		sum += ini;
		for(int j = 0; j < M; ++j) A[i][j] -= ini;
	}

	//dp、O(NMK) 
	vector<int> dp(K+1,0);
	dp[sum]=1;
	for(int i = 0; i < N; ++i){
		vector<int> tmp(K+1,0);
		for(int j = 0; j < M; ++j) {
			for(int k = 0; k + A[i][j] <= K; ++k) {
				if(dp[k]) tmp[k+A[i][j]] = 1;
			}
		}
		dp = tmp;
	}

	//最大値探索 O(K)
	for(int i = K; 0 <= i; --i) {
		if(dp[i]){
			cout << K - i << endl;
			return 0;
		}
	}

	//ないとき
	cout << -1 << endl;
    return 0;
}