import java.io.IOException;
import java.io.InputStream;
import java.util.*;

public class Main {

    public static void main(String[] args) {
        FastScanner fs = new FastScanner();
        int N = fs.nextInt();
        int M = fs.nextInt();
        int X = fs.nextInt();
        int[] C = new int[N+5];
        int[][] A = new int[N+5][M+5];

        for (int i = 0; i < N; ++i) {
            for (int j = 0; j < M+1; ++j) {
                if (j == 0) {
                    C[i] = fs.nextInt();
                } else {
                    A[i][j-1] = fs.nextInt();
                }
            }
        }

        int ans = Integer.MAX_VALUE;
        for (int bit = 0; bit < (1<<N); ++bit) {
            int cost = 0;
            int[] tmpA = new int[M+5];
            for (int i = 0; i < N; ++i) {

                if ((bit & (1<<i)) != 0) {
                    cost += C[i];
                    for (int j = 0; j < M; ++j) {
                        tmpA[j] += A[i][j];
                    }
                }
            }

            boolean isok = true;
            for (int j = 0; j < M; ++j) {
                if (tmpA[j] < X) {
                    isok = false;
                    break;
                }
            }

            if (cost < ans && isok) ans = cost;
        }

        if (ans != Integer.MAX_VALUE)
            System.out.println(ans);
        else
            System.out.println(-1);
    }
}

class FastScanner {
    private final InputStream in = System.in;
    private final byte[] buffer = new byte[1024];
    private int ptr = 0;
    private int buflen = 0;

    private boolean hasNextByte() {
        if (ptr < buflen) {
            return true;
        }else{
            ptr = 0;
            try {
                buflen = in.read(buffer);
            } catch (IOException e) {
                e.printStackTrace();
            }
            if (buflen <= 0) {
                return false;
            }
        }
        return true;
    }

    private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1;}
    private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126;}
    public boolean hasNext() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; return hasNextByte();}

    public String next() {
        if (!hasNext()) throw new NoSuchElementException();
        StringBuilder sb = new StringBuilder();
        int b = readByte();
        while(isPrintableChar(b)) {
            sb.appendCodePoint(b);
            b = readByte();
        }
        return sb.toString();
    }

    public long nextLong() {
        if (!hasNext()) throw new NoSuchElementException();
        long n = 0;
        boolean minus = false;
        int b = readByte();
        if (b == '-') {
            minus = true;
            b = readByte();
        }
        if (b < '0' || '9' < b) {
            throw new NumberFormatException();
        }
        while(true){
            if ('0' <= b && b <= '9') {
                n *= 10;
                n += b - '0';
            }else if(b == -1 || !isPrintableChar(b)){
                return minus ? -n : n;
            }else{
                throw new NumberFormatException();
            }
            b = readByte();
        }
    }

    public int nextInt() {
        long nl = nextLong();
        if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException();
        return (int) nl;
    }

    public double nextDouble() { return Double.parseDouble(next());}
}




Measured memory_bytes: 34176