# include <bits/stdc++.h>
# define rep(i, n) for(int i=0, i##_len=(n); i<i##_len; ++i)
# define reps(i, n) for(int i=1, i##_len=(n); i<=i##_len; ++i)
# define rrep(i, n) for(int i=((int)(n)-1); i>=0; --i)
# define rreps(i, n) for(int i=((int)(n)); i>0; --i)
# define range_for(i, b, e) for(int i=(b), i##_len=(e); i<=i##_len; ++i)
# define step(n) rep(_, n)
# define ALL(x) (x).begin(), (x).end()
# define RALL(x) (x).rbegin(), (x).rend()
# define Unique(a) a.erase(unique(ALL(a)), a.end())
# define pb push_back
# define len(x) ((int)(x).size())
# define optimize_cin() cin.tie(0); ios::sync_with_stdio(false)
# define debug(x) std::cerr<<#x<<": "<<(x)<<endl;
# define LINT_MAX (LLONG_MAX)
# define LINT_MIN (LLONG_MIN)
# define cauto const auto
using namespace std;
using lint = long long;
template <class Type> inline constexpr Type Square(Type x) { return x * x; }
template <class Type> inline constexpr bool InRange(const Type& x, const Type& i, const Type& a) { return (i <= x) && (x <= a); }
template<class Integer>bool chmax(Integer &a, const Integer &b) { if (a<b) { a=b; return 1; } return 0; }
template<class Integer>bool chmin(Integer &a, const Integer &b) { if (b<a) { a=b; return 1; } return 0; }
template<class Integer>bool IsOdd(Integer &n) { return n & 1; }
template<class Integer>bool IsEven(Integer &n) { return !(n & 1); }
int ctoi(const char c) { return ('0' <= c && c <= '9') ? (c - '0') : -1; }
string YesNo(bool b) { return b ? "Yes" : "No"; }
string YESNO(bool b) { return b ? "YES" : "NO"; }
string yesno(bool b) { return b ? "yes" : "no"; }
void _cin(){} template <class Head, class... Tail> void _cin(Head&& head, Tail&&... tail){ cin >> head; _cin(forward<Tail>(tail)...); }
#define Cin(Type, ...) Type __VA_ARGS__; _cin(__VA_ARGS__)
#define Cinv(Type, xs, n) vector<Type> xs(n); rep(i, n) cin >> xs[i]
#define Cinv2(Type, xs, ys, n) vector<Type> xs(n), ys(n); rep(i, n) cin >> xs[i] >> ys[i]
#define Cinv3(Type, xs, ys, zs, n) vector<Type> xs(n), ys(n), zs(n); rep(i, n) cin >> xs[i] >> ys[i] >> zs[i]
#define Cinvv(Type, xs, h, w) vector<vector<Type>> xs(h, vector<int>(w)); rep(i, h) rep(j, w) cin >> xs[i][j]
void Print() { cout << endl; }
template <class Head, class... Tail> void Print(Head&& head, Tail&&... tail) { cout << head; if (sizeof...(tail) != 0) cout << " "; Print(forward<Tail>(tail)...); }
template <class Type> void Print(vector<Type> &vec) { for (auto& a : vec) { cout << a; if (&a != &vec.back()) cout << " "; } cout << endl; }
template <class Type> void Print(vector<vector<Type>> &df) { for (auto& vec : df) { Print(vec); } }
void Debug() { cerr << endl; }
template <class Head, class... Tail> void Debug(Head&& head, Tail&&... tail) { cerr << head; if (sizeof...(tail) != 0) cerr << " "; Debug(forward<Tail>(tail)...); }
template <class Type> void Debug(vector<Type> &vec) { for (auto& a : vec) { cerr << a; if (&a != &vec.back()) cerr << " "; } cerr << endl; }
template <class Type> void Debug(vector<vector<Type>> &df) { for (auto& vec : df) { Debug(vec); } }

int main()
{
    Cin(int, N, M, X);
    vector<int> C(N);
    vector<vector<int>> A(N, vector<int>(M, 0));
    rep (i, N)
    {
        cin >> C[i];
        rep (k, M)
        {
            cin >> A[i][k];
        }
    }

    int ans = INT_MAX;
    bool can = false;
    for (int bit = 0; bit < (1<<N); ++bit)
    {
        vector<int> indexes;
        for (int i = 0; i < N; ++i)
        {
            if (bit & (1<<i))
            {
                indexes.pb(i);
            }
        }

        if (len(indexes) == 0)
        {
            continue;
        }

        vector<int> und(M, 0);
        int cost = 0;
        for (cauto& i : indexes)
        {
            rep (k, M)
            {
                und[k] += A[i][k];
            }
            cost += C[i];
        }
        bool flag = true;
        for (cauto& it : und)
        {
            if (it < X)
            {
                flag = false;
                break;
            }
        }
        if (flag)
        {
            can = true;
            chmin(ans, cost);
        }
    }

    if (can)
    {
        Print(ans);
    }
    else
    {
        Print(-1);
    }
    
    return 0;
}



Measured memory_bytes: 3632