// yuki 914 Omiyage
// 2019.10.27 bal4u

#include <stdio.h>
#include <ctype.h>
#include <string.h>

int getchar_unlocked(void);
#define gc() getchar_unlocked()

int in() {   // 非負整数の入力
	int n = 0; int c;
	do c = gc(); while (isspace(c));
	do n = 10 * n + (c & 0xf); while ((c = gc()) >= '0');
	return n;
}

char dp[12][505];
int A[12];

int main()
{
	int i, j, k, f, N, M, K;
	
    N = in(), M = in(), K = in();
    dp[0][0] = 1;
    for (i = 1; i <= N; ++i) {
        for (j = 0; j < M; ++j) A[j] = in();
        f = 0;
        for (k = K-1; k >= 0; --k) if (dp[i-1][k]) {
            for (j = M-1; j >= 0; j--) {
                if (k+A[j] <= K) dp[i][k+A[j]] = 1, f = 1;
            }
        }
        if (f == 0) { puts("-1"); return 0; }
    }
    for (i = K; i >= 0; --i) if (dp[N][i]) break;
    printf("%d\n", K-i);
	return 0;
}