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View Compilation Error

0_0_38734283_967\Main.java:3: 错误: 找不到符号
        Scanner scanner = new Scanner(System.in);
        ^
  符号:   类 Scanner
  位置: 类 Main
0_0_38734283_967\Main.java:3: 错误: 找不到符号
        Scanner scanner = new Scanner(System.in);
                              ^
  符号:   类 Scanner
  位置: 类 Main
0_0_38734283_967\Main.java:11: 错误: 找不到符号
            Arrays.sort(s, 1, n + 1, Comparator.comparingDouble(o -> o.a + o.b));
                                     ^
  符号:   变量 Comparator
  位置: 类 Main
0_0_38734283_967\Main.java:11: 错误: 找不到符号
            Arrays.sort(s, 1, n + 1, Comparator.comparingDouble(o -> o.a + o.b));
            ^
  符号:   变量 Arrays
  位置: 类 Main
4 个错误


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