#include <bits/stdc++.h>   using namespace std;   long double DP[202][202][202];   long double P[202];   int A[202];   int main() {     ios::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     int n, l, k;     cin >> n >> l >> k;     k = min(k, n);     for (int i = 1; i <= n; i++) cin >> P[i], P[i] /= 100.0;     for (int i = 1; i <= n; i++) cin >> A[i];     DP[1][0][k] = 1;     for (int i = 1; i <= n; i++)       for (int j = 0; j < i; j++)         for (int z = k; z <= n; z++) {           DP[i + 1][j][z] += DP[i][j][z] * (1.0 - P[i]);           if (A[i] == -1)             DP[i + 1][j + 1][z] += DP[i][j][z] * P[i];           else             DP[i + 1][j + 1][min(n, z + A[i] + 1)] += DP[i][j][z] * P[i];         }     long double ats = 0;     for (int j = l; j <= n; j++)       for (int z = max(k, j); z <= n; z++) ats += DP[n + 1][j][z];     cout << setprecision(13) << fixed << ats;   }   