[백준] 15001 Frog Leaps - Greedy / Java

• 문제 링크

15001번: Frog Leaps

 

• 풀이 코드

import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;

public class Main {

    public static void main(String[] args) throws IOException {
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));

        long n = read(), p = read(), x, sum = 0;
        for (; n > 1; n--, p = x) sum += (long) Math.pow((x = read()) - p, 2);

        bw.write(String.valueOf(sum));
        bw.flush();
    }

    private static long read() throws IOException {
        long c, n = System.in.read() & 15;
        while ((c = System.in.read()) > 32) n = (n << 3) + (n << 1) + (c & 15);

        return n;
    }

}