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View Compilation Error

0_0_28129859_20926.cpp:1:1: error: 'import' does not name a type
 import java.util.*;
 ^
0_0_28129859_20926.cpp:2:1: error: 'import' does not name a type
 import java.math.*;
 ^
0_0_28129859_20926.cpp:5:9: error: expected ':' before 'static'
  public static void main(String[] args) {
         ^
0_0_28129859_20926.cpp:5:26: error: 'String' has not been declared
  public static void main(String[] args) {
                          ^
0_0_28129859_20926.cpp:5:35: error: expected ',' or '...' before 'args'
  public static void main(String[] args) {
                                   ^
0_0_28129859_20926.cpp:20:1: error: expected ';' after class definition
 }
 ^
0_0_28129859_20926.cpp: In static member function 'static void Main::main(int*)':
0_0_28129859_20926.cpp:6:3: error: 'Scanner' was not declared in this scope
   Scanner kb = new Scanner(System.in);
   ^
0_0_28129859_20926.cpp:7:9: error: 'kb' was not declared in this scope
   int T=kb.nextInt();
         ^
0_0_28129859_20926.cpp:11:8: error: expected unqualified-id before '[' token
    long[] a=new long[n];
        ^
0_0_28129859_20926.cpp:13:24: error: 'a' was not declared in this scope
    for(int j=0;j<n;j++)a[j]=kb.nextLong();
                        ^
0_0_28129859_20926.cpp:14:4: error: 'Arrays' was not declared in this scope
    Arrays.sort(a);
    ^
0_0_28129859_20926.cpp:14:16: error: 'a' was not declared in this scope
    Arrays.sort(a);
                ^
0_0_28129859_20926.cpp:16:29: error: 'Math' was not declared in this scope
    for(int j=1;j<m-1;j++)if(Math.pow(a[j]-a[j-1], 2)>max)max=(a[j]-a[j-1])*(a[j]-a[j-1]);
                             ^
0_0_28129859_20926.cpp:17:4: error: 'System' was not declared in this scope
    System.out.println(max);
    ^


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