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

int main() {
	//入力
	int N,M,K; cin >> N >> M >> K;
	assert(1<=N&&N<=20);
	assert(1<=M&&M<=20);
	assert(1<=K&&K<=1000);

	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);
		}
	}

	//ソート、差分計算、初期値
	int sum = 0;
	for(int i = 0; i < N; ++i) {
		sort(a[i].begin(),a[i].end());
		int ini = a[i][0];
		sum += ini;
		for(int j = 0; j < M; ++j) a[i][j] -= ini;
	}

	//dp
	bitset<1001> dp;
	dp.set(sum);
	for(int i = 0; i < N; ++i){
		auto tmp = dp;
		for(int j = 0; j < M; ++j) dp |= (tmp<<a[i][j]);
	}

	//最大値探索
	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;
}