#include <iostream>
#define MAX 200000000
#define MAXN 101
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL);
using namespace std;
int a[MAXN], c[MAXN], dp[MAXN][10001];
int main() {
    fastio;
    int n, m;
    cin >> n >> m;
    for (int i = 0; i < n; i++) cin >> a[i];
    for (int i = 0; i < n; i++) cin >> c[i];
    int ans = MAX;
    dp[0][c[0]] = a[0];
    for (int i = 1; i <= n; i++) {
        for (int j = 0; j <= 10000; j++) {
            if (j - c[i] >= 0)  dp[i][j] = max(dp[i][j], dp[i - 1][j - c[i]] + a[i]);
            dp[i][j] = max(dp[i][j], dp[i - 1][j]);
            if (dp[i][j] >= m) ans = min(ans, j);
        }
    }
    cout << ans;
}