#include <bits/stdc++.h>
#include <boost/multiprecision/cpp_int.hpp>
using namespace std;
using bint = boost::multiprecision::cpp_int;
using ll = long long;
using pint = pair<int, int>;
using pll = pair<ll, ll>;
#define rep(i,n) for (int i = 0; i < (n); i++)
#define repSE(i,s,n) for (int i = (s); i < (n); i++)
#define rrepSE(i,s,e) for (int i = (s); i > (e); i--)
#define ssort(v) sort(v.begin(), v.end())
#define gsort(v) sort(v.rbegin(), v.rend())
template<typename T> istream &operator>>(istream &is, vector<T> &vec){ for (auto &v : vec) is >> v; return is; }
template<typename T> ostream &operator<<(ostream &os, const vector<T> &vec){ os << "["; for (auto v : vec) os << v << ","; os << "]"; return os; }
template<typename T> ostream &operator<<(ostream &os, const deque<T> &vec){ os << "deq["; for (auto v : vec) os << v << ","; os << "]"; return os; }
template<typename T> ostream &operator<<(ostream &os, const set<T> &vec){ os << "{"; for (auto v : vec) os << v << ","; os << "}"; return os; }
template<typename T> ostream &operator<<(ostream &os, const unordered_set<T> &vec){ os << "{"; for (auto v : vec) os << v << ","; os << "}"; return os; }
template<typename T> ostream &operator<<(ostream &os, const multiset<T> &vec){ os << "{"; for (auto v : vec) os << v << ","; os << "}"; return os; }
template<typename T> ostream &operator<<(ostream &os, const unordered_multiset<T> &vec){ os << "{"; for (auto v : vec) os << v << ","; os << "}"; return os; }
template<typename T1, typename T2> ostream &operator<<(ostream &os, const pair<T1, T2> &pa){ os << "(" << pa.first << "," << pa.second << ")"; return os; }
template<typename TK, typename TV> ostream &operator<<(ostream &os, const map<TK, TV> &mp){ os << "{"; for (auto v : mp) os << v.first << "=>" << v.second << ","; os << "}"; return os; }
template<typename TK, typename TV> ostream &operator<<(ostream &os, const unordered_map<TK, TV> &mp){ os << "{"; for (auto v : mp) os << v.first << "=>" << v.second << ","; os << "}"; return os; }
template<typename T> bool chmax(T &m, const T q) { if (m < q) {m = q; return true;} else return false; }
template<typename T> bool chmin(T &m, const T q) { if (q < m) {m = q; return true;} else return false; }

deque<int> binary(int bina, int n){
    deque<int> ans;
    for (int i = 0; bina>0 ; i++)
    {
        ans.push_front(bina%2);
        bina = bina/2;
    }
    int j = ans.size();
    while (j < n) {
        ans.push_front(0);
        j++;
    }
    return ans;
}

const ll MX = 1001001001;
int main()
{
    int n, m, x;
    cin >> n >> m >> x;
    vector<int> c(n);
    vector<vector<int>> a(n, vector<int>(m));
    rep(i,n) {
        cin >> c[i];
        rep(j,m) cin >> a[i][j];
    }
    int ans = MX;
    rep(i, 1<<n) {
        deque<int> bin = binary(i, n);
        vector<int> rikai(m);
        int pri = 0;
        rep(j,n) {
            if (bin[j]) {
                rep(k,m) rikai[k] += a[j][k];
                pri += c[j];
            }
        }
        bool ok = true;
        rep(k,m) {
            if (rikai[k] < x) {
                ok = false;
                break;
            }
        }
        if (ok) chmin(ans, pri);
    }
    cout << ((ans == MX)?-1:ans) << "\n";
    return 0;
}


Measured memory_bytes: 3636