package main import ( "bufio" "fmt" "math" "os" "strconv" ) func min(a, b int) int { if a < b { return a } return b } func abs(a int) int { if a < 0 { return -a } return a } func main() { defer flush() N := readInt() Y := make([]int, N) for i := 0; i < N; i++ { Y[i] = readInt() } dp := make([][]int, N) for i := 0; i < N; i++ { dp[i] = make([]int, 10000+1) } for j := 0; j < 10000+1; j++ { dp[0][j] = abs(Y[0] - j) } for i := 1; i < N; i++ { t := math.MaxInt64 for j := 0; j < 10000+1; j++ { t = min(t, dp[i-1][j]) dp[i][j] = t + abs(Y[i]-j) } } result := math.MaxInt64 for j := 0; j < 10000+1; j++ { result = min(result, dp[N-1][j]) } println(result) } const ( ioBufferSize = 1 * 1024 * 1024 // 1 MB ) var stdinScanner = func() *bufio.Scanner { result := bufio.NewScanner(os.Stdin) result.Buffer(make([]byte, ioBufferSize), ioBufferSize) result.Split(bufio.ScanWords) return result }() func readString() string { stdinScanner.Scan() return stdinScanner.Text() } func readInt() int { result, err := strconv.Atoi(readString()) if err != nil { panic(err) } return result } var stdoutWriter = bufio.NewWriter(os.Stdout) func flush() { stdoutWriter.Flush() } func printf(f string, args ...interface{}) (int, error) { return fmt.Fprintf(stdoutWriter, f, args...) } func println(args ...interface{}) (int, error) { return fmt.Fprintln(stdoutWriter, args...) }