View Compilation Error

0_0_31395748_18061.cpp:1:1: error: 'import' does not name a type
 import java.math.BigInteger;
 ^
0_0_31395748_18061.cpp:2:1: error: 'import' does not name a type
 import java.util.Arrays;
 ^
0_0_31395748_18061.cpp:3:1: error: 'import' does not name a type
 import java.util.HashSet;
 ^
0_0_31395748_18061.cpp:4:1: error: 'import' does not name a type
 import java.util.Scanner;
 ^
0_0_31395748_18061.cpp:5:1: error: 'import' does not name a type
 import java.util.Set;
 ^
0_0_31395748_18061.cpp:7:1: error: expected unqualified-id before 'public'
 public class Main
 ^