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View Compilation Error

0_0_28863544_18616.cpp:1:1: error: 'import' does not name a type
 import java.util.*;
 ^
0_0_28863544_18616.cpp:4:10: error: expected ':' before 'static'
   public static void main(String [] args){
          ^
0_0_28863544_18616.cpp:4:27: error: 'String' has not been declared
   public static void main(String [] args){
                           ^
0_0_28863544_18616.cpp:4:37: error: expected ',' or '...' before 'args'
   public static void main(String [] args){
                                     ^
0_0_28863544_18616.cpp:18:1: error: expected ';' after class definition
 }
 ^
0_0_28863544_18616.cpp: In static member function 'static void Main::main(int*)':
0_0_28863544_18616.cpp:5:6: error: 'Scanner' was not declared in this scope
      Scanner sc=new Scanner(System.in);
      ^
0_0_28863544_18616.cpp:6:12: error: 'sc' was not declared in this scope
      int n=sc.nextInt();
            ^
0_0_28863544_18616.cpp:8:11: error: expected unqualified-id before '[' token
      long [] dp=new long [51];
           ^
0_0_28863544_18616.cpp:9:6: error: 'dp' was not declared in this scope
      dp[2]=1;dp[3]=2;
      ^
0_0_28863544_18616.cpp:15:6: error: 'System' was not declared in this scope
      System.out.println(dp[b-a+1]);
      ^


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