from sys import stdin
def main():
    #入力
    readline=stdin.readline
    n=int(readline())
    y=list(map(int,readline().split()))

    dp=[[0]*(10**4+1) for _ in range(n)]
    for i in range(n):
        y_now=y[i]
        if i==0:
            for j in range(10**4+1):
                dp[i][j]=abs(y_now-j)
        else:
            for j in range(10**4+1):
                if j==0:
                    before_min=dp[i-1][j]
                else:
                    before_min=min(before_min,dp[i-1][j])
                dp[i][j]=before_min+abs(y_now-j)

    ans=float("inf")
    for j in range(10**4+1):
        ans=min(ans,dp[n-1][j])

    print(ans)

if __name__=="__main__":
    main()