using System;
using System.Linq;

namespace AtCoder.Problems
{
    public class ProblemC
    {
        public static void Main(string[] args)
        {
            var s = new SolveC();
            s.Solve();
        }

        public class Scanner
        {
            private string[] _s;
            private int _i;
            private readonly char[] _separators = new char[] { ' ' };

            public Scanner()
            {
                _s = new string[0];
                _i = 0;
            }

            public string Next()
            {
                if (_i < _s.Length) return _s[_i++];
                string st = Console.ReadLine();
                while (st == "") st = Console.ReadLine();
                _s = st.Split(_separators, StringSplitOptions.RemoveEmptyEntries);
                if (_s.Length == 0) return Next();
                _i = 0;
                return _s[_i++];
            }

            public int NextInt() => int.Parse(Next());
            public long NextLong() => long.Parse(Next());
            public ulong NextULong() => ulong.Parse(Next());
            public double NextDouble() => double.Parse(Next());

            public int[] GetIntArray(int n, int add = 0)
            {
                int[] array = new int[n];
                for (int i = 0; i < n; i++)
                {
                    array[i] = NextInt() + add;
                }
                return array;
            }

            public long[] GetLongArray(int n, long add = 0)
            {
                long[] array = new long[n];
                for (int i = 0; i < n; i++)
                {
                    array[i] = NextLong() + add;
                }
                return array;
            }

            public double[] GetDoubleArray(int n, double add = 0)
            {
                double[] array = new double[n];
                for (int i = 0; i < n; i++)
                {
                    array[i] = NextDouble() + add;
                }
                return array;
            }

            public string[] GetStringArray(int n)
            {
                string[] array = new string[n];
                for (int i = 0; i < n; i++)
                {
                    array[i] = Next();
                }
                return array;
            }
        }
    }

    public class SolveC
    {
        public void Solve()
        {
            var cin = new ProblemC.Scanner();
            var n = cin.NextInt();
            var m = cin.NextInt();
            var x = cin.NextInt();

            var c = new int[n];
            var a = new int[n, m];
            for (int i = 0; i < n; i++)
            {
                c[i] = cin.NextInt();
                for (int j = 0; j < m; j++)
                {
                    a[i, j] = cin.NextInt();
                }
            }

            var result = GetAnswer(n, m, x, c, a);
            Console.WriteLine(result);
        }

        public long GetAnswer(int n, int m, int x, int[] c, int[,] a)
        {
            var ans = long.MaxValue;

            var tmp = new int[m];

            for (uint flag = 0; flag < 1 << n; flag++)
            {
                for (int i = 0; i < tmp.Length; i++) { tmp[i] = 0; }
                var totalPrice = 0L;

                for (int i = 0; i < n; i++)
                {
                    if ((flag & (1 << i)) == 0)
                    {
                        continue;
                    }

                    totalPrice += c[i];
                    for (int j = 0; j < m; j++)
                    {
                        tmp[j] += a[i, j];
                    }
                }

                if (tmp.All(v => v >= x))
                {
                    ans = Math.Min(ans, totalPrice);
                }
            }

            if (ans == long.MaxValue) { return -1; }
            return ans;
        }
    }
}


Measured memory_bytes: 28060