/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		int N = 5;
		int[] A = {0, 3, 5, 2, 1, 9};
		int[] B = {0, 1, 1, 10, 5, 3};
 
		int[] dp = new int[N + 1];
 
		dp[0] = 0;
 
		for(int i = 1; i <= N; i++){
			int ans = 1000;
			int sum = B[i];
			ans = Math.min(ans, A[i] + dp[i-1]);
			for(int j = i - 1; j >= 1; j--){
				sum += B[j];
				ans = Math.min(ans, sum + dp[j - 1]);
			}
			dp[i] = ans;
		}
		System.out.println(dp[N]);
	}
}

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