View Compilation Error

0_0_38107591_41\Main.java:1: 错误: 需要class, interface或enum
classclass Solution {
^
0_0_38107591_41\Main.java:2: 错误: 需要class, interface或enum
    public int solve(int A, int B) {
           ^
0_0_38107591_41\Main.java:4: 错误: 需要class, interface或enum
        for (int i = A; i <= B; i++) {
        ^
0_0_38107591_41\Main.java:4: 错误: 需要class, interface或enum
        for (int i = A; i <= B; i++) {
                        ^
0_0_38107591_41\Main.java:4: 错误: 需要class, interface或enum
        for (int i = A; i <= B; i++) {
                                ^
0_0_38107591_41\Main.java:6: 错误: 需要class, interface或enum
            int num = i;
            ^
0_0_38107591_41\Main.java:7: 错误: 需要class, interface或enum
            while (num > 0) {
            ^
0_0_38107591_41\Main.java:9: 错误: 需要class, interface或enum
                num /= 10;
                ^
0_0_38107591_41\Main.java:10: 错误: 需要class, interface或enum
            }
            ^
0_0_38107591_41\Main.java:13: 错误: 需要class, interface或enum
            }
            ^
0_0_38107591_41\Main.java:16: 错误: 需要class, interface或enum
    }
    ^
11 个错误