View Compilation Error

0_0_26968365_3873.cpp:12:1: error: stray '\243' in program
 int n，m;
 ^
0_0_26968365_3873.cpp:12:1: error: stray '\254' in program
0_0_26968365_3873.cpp:2:1: error: 'import' does not name a type
 import java.util.*;
 ^
0_0_26968365_3873.cpp:3:1: error: 'import' does not name a type
 import java.math.BigInteger;
 ^
0_0_26968365_3873.cpp:4:1: error: expected unqualified-id before 'public'
 public class Main {
 ^