不知道为什么，我csp考试的时候交的满分答案下载下来之后，在练习系统里交是零分？？？我不理解。

第二题 坐标变换其二（Java组）

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class Main {
    static int n, m;
    static final int N = 100010;
    static int[] op = new int[N];
    static double[] jiaobianhuan = new double[N];
    static double[] kbianhuan = new double[N];

    static double[] op(int x, int y, int i1, int j1) {
        double[] res = new double[]{(double) x, (double) y};
        double delta_theta = jiaobianhuan[j1] - jiaobianhuan[i1 - 1];
        double delta_k = kbianhuan[j1] / kbianhuan[i1 - 1];
        double a = res[0], b = res[1];
        res[0] = a * Math.cos(delta_theta) - b * Math.sin(delta_theta);
        res[1] = a * Math.sin(delta_theta) + b * Math.cos(delta_theta);
        res[0] *= delta_k;
        res[1] *= delta_k;
        return res;
    }

    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
        String[] first_line = br.readLine().split(" ");
        n = Integer.parseInt(first_line[0]);
        m = Integer.parseInt(first_line[1]);
        for (int i = 1; i <= n; i++) {
            String[] second_line = br.readLine().split(" ");
            op[i] = Integer.parseInt(second_line[0]);
            double val = Double.parseDouble(second_line[1]);
            if (op[i] == 1) {
                kbianhuan[i] = val;
                jiaobianhuan[i] = 0.0;
            } else {
                kbianhuan[i] = 1.0;
                jiaobianhuan[i] = val;
            }
        }
        kbianhuan[0] = 1.0;
        for (int i = 1; i <= n; i++) {
            kbianhuan[i] *= kbianhuan[i - 1];
            jiaobianhuan[i] += jiaobianhuan[i - 1];
        }
        for (int i = 1; i <= m; i++) {
            int i1, j1, x, y;
            String[] third_line = br.readLine().split(" ");
            i1 = Integer.parseInt(third_line[0]);
            j1 = Integer.parseInt(third_line[1]);
            x = Integer.parseInt(third_line[2]);
            y = Integer.parseInt(third_line[3]);
            double[] res = op(x, y, i1, j1);
            bw.write(String.format("%.3f %.3f\n", res[0], res[1]));
        }
        bw.flush();
    }
}