уа

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
int main()
{
    int n;
    cin >> n;
    vector <int> dp(n);
    vector <int> a(n);
    for (int i = 0; i<n; i++) {
         cin >> a[i];
    } dp[0]=a[0];
    dp[1]=abs(a[1]-a[0]);
    for (int i = 2; i<n; i++) {
        dp[i] = min(abs(a[i] - a[i-1]) + dp[i - 1], 3 * abs(a[i] - a[i-2]) + dp[i - 2]);
    }
    cout << dp[n-1];
    return 0;
}