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

template <typename A, typename B>
string to_string(pair<A, B> p);
 
template <typename A, typename B, typename C>
string to_string(tuple<A, B, C> p);
 
template <typename A, typename B, typename C, typename D>
string to_string(tuple<A, B, C, D> p);
 
string to_string(const string& s) {
  return '"' + s + '"';
}

string to_string(const char& ch) {
	string s = "";
	s += ch;
	return "'" + s + "', ";
}
 
string to_string(const char* s) {
  return to_string((string) s);
}
 
string to_string(bool b) {
  return (b ? "true" : "false");
}
 
string to_string(vector<bool> v) {
  bool first = true;
  string res = "{";
  for (int i = 0; i < static_cast<int>(v.size()); i++) {
    if (!first) {
      res += ", ";
    }
    first = false;
    res += to_string(v[i]);
  }
  res += "}";
  return res;
}
 
template <size_t N>
string to_string(bitset<N> v) {
  string res = "";
  for (size_t i = 0; i < N; i++) {
    res += static_cast<char>('0' + v[i]);
  }
  return res;
}
 
template <typename A>
string to_string(A v) {
  bool first = true;
  string res = "{";
  for (const auto &x : v) {
    if (!first) {
      res += ", ";
    }
    first = false;
    res += to_string(x);
  }
  res += "}";
  return res;
}
 
template <typename A, typename B>
string to_string(pair<A, B> p) {
  return "(" + to_string(p.first) + ", " + to_string(p.second) + ")";
}
 
template <typename A, typename B, typename C>
string to_string(tuple<A, B, C> p) {
  return "(" + to_string(get<0>(p)) + ", " + to_string(get<1>(p)) + ", " + to_string(get<2>(p)) + ")";
}
 
template <typename A, typename B, typename C, typename D>
string to_string(tuple<A, B, C, D> p) {
  return "(" + to_string(get<0>(p)) + ", " + to_string(get<1>(p)) + ", " + to_string(get<2>(p)) + ", " + to_string(get<3>(p)) + ")";
}
 
void debug_out() { cout << endl; }
 
template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
  cout << " " << to_string(H);
  debug_out(T...);
}
 
#ifdef LOCAL_DEFINE
#define debug(...) cout << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#else
#define debug(...) 42
#endif
   
#define int long long
#define sz(v) ((int)(v).size())
#define all(v) (v).begin(),(v).end()
typedef pair<int, int> pii;
const int mod = (int) 1000000007; // 998244353;
const int inf = (int) 2e18;



int32_t main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout << fixed << setprecision(9);
	#ifdef LOCAL_DEFINE
		freopen("in.txt", "rt", stdin);
	#endif
	
	
	int n, m, x;
	cin >> n >> m >> x;
	vector<int> c(n);
	vector<vector<int>> adj(n, vector<int>(m));
	for(int i = 0; i < n; ++ i)
	{
		cin >> c[i];
		for(int j = 0; j < m; ++ j)
		{
			cin >> adj[i][j];
		}
	}
	debug(adj); debug(c);
	int mn = inf;
	for(int i = 0; i < (1ll << n); ++ i)
	{
		vector<int> su(m, 0);
		int cur = 0;
		for(int j = 0; j < n; ++ j)
		{
			if(i & (1ll << j))
			{
				cur += c[j];
				for(int k = 0; k < m; ++ k)
				{
					su[k] += adj[j][k];
				}
			}
		}
		debug(su);
		bool ok = true;
		for(int i = 0; i < m; ++ i)
			ok &= (su[i] >= x);
		if(ok)
			mn = min(mn, cur);
	}
	
	if(mn == inf)
		cout << -1 << '\n';
	else
		cout << mn << '\n';
	
	return 0;
}






Measured memory_bytes: 3664