#include <iostream>
#include <vector>
#include <string>
#include <sstream>

using namespace std;

const int INF = 1000000000;

class WhiteSpaceEditing {
public:
	int getMinimum(vector <int> lines) {
		int n = lines.size();
		int dp[50][50][50];
		for(int i=0;i<n;i++){
			for(int j=0;j<n;j++){
				dp[i][j][j] = abs(lines[i]-lines[j]);
				for(int k=0;k<n;k++)
					if(j!=k) dp[i][j][k] = INF;
			}
		}
		for(int d=1;d<n;d++){
			for(int j=0;j+d<n;j++){
				int k=j+d;
				for(int i=0;i<n;i++){
					for(int mid=j;mid+1<=k;mid++){
						int a = INF, b = INF;
						for(int h=0;h<n;h++){
							a = min(a, dp[h][j][mid]+abs(lines[h]-lines[i]));
							b = min(b, dp[h][mid+1][k]+abs(lines[h]-lines[i]));
						}
						dp[i][j][k] = min(dp[i][j][k], a+b);
					}
				}
			}
		}
		int res = INF;
		for(int i=0;i<n;i++)
			res = min(res, dp[i][0][n-1]+lines[i]);
		return res+n-1;
	}
// BEGIN CUT HERE
	public:
	void run_test(int Case) { if ((Case == -1) || (Case == 0)) test_case_0(); if ((Case == -1) || (Case == 1)) test_case_1(); if ((Case == -1) || (Case == 2)) test_case_2(); if ((Case == -1) || (Case == 3)) test_case_3(); }
	private:
	template <typename T> string print_array(const vector<T> &V) { ostringstream os; os << "{ "; for (typename vector<T>::const_iterator iter = V.begin(); iter != V.end(); ++iter) os << '\"' << *iter << "\","; os << " }"; return os.str(); }
	void verify_case(int Case, const int &Expected, const int &Received) { cerr << "Test Case #" << Case << "..."; if (Expected == Received) cerr << "PASSED" << endl; else { cerr << "FAILED" << endl; cerr << "\tExpected: \"" << Expected << '\"' << endl; cerr << "\tReceived: \"" << Received << '\"' << endl; } }
	void test_case_0() { int Arr0[] = { 3, 2, 3 }; vector <int> Arg0(Arr0, Arr0 + (sizeof(Arr0) / sizeof(Arr0[0]))); int Arg1 = 6; verify_case(0, Arg1, getMinimum(Arg0)); }
	void test_case_1() { int Arr0[] = { 0 }; vector <int> Arg0(Arr0, Arr0 + (sizeof(Arr0) / sizeof(Arr0[0]))); int Arg1 = 0; verify_case(1, Arg1, getMinimum(Arg0)); }
	void test_case_2() { int Arr0[] = { 1, 2, 4 }
; vector <int> Arg0(Arr0, Arr0 + (sizeof(Arr0) / sizeof(Arr0[0]))); int Arg1 = 6; verify_case(2, Arg1, getMinimum(Arg0)); }
	void test_case_3() { int Arr0[] = { 250, 105, 155, 205, 350 }
; vector <int> Arg0(Arr0, Arr0 + (sizeof(Arr0) / sizeof(Arr0[0]))); int Arg1 = 499; verify_case(3, Arg1, getMinimum(Arg0)); }

// END CUT HERE
};

// BEGIN CUT HERE
int main() {
	WhiteSpaceEditing ___test;
	___test.run_test(-1);
}
// END CUT HERE