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View Compilation Error

0_0_27679591_21280.cpp:1:1: error: 'import' does not name a type
 import java.io.BufferedInputStream;
 ^
0_0_27679591_21280.cpp:2:1: error: 'import' does not name a type
 import java.util.Scanner;
 ^
0_0_27679591_21280.cpp:7:9: error: expected ':' before 'static'
  public static void main(String[] args) {
         ^
0_0_27679591_21280.cpp:7:26: error: 'String' has not been declared
  public static void main(String[] args) {
                          ^
0_0_27679591_21280.cpp:7:35: error: expected ',' or '...' before 'args'
  public static void main(String[] args) {
                                   ^
0_0_27679591_21280.cpp:25:1: error: expected ';' after class definition
 }
 ^
0_0_27679591_21280.cpp: In static member function 'static void Main::main(int*)':
0_0_27679591_21280.cpp:9:3: error: 'Scanner' was not declared in this scope
   Scanner sc = new Scanner(new BufferedInputStream(System.in));
   ^
0_0_27679591_21280.cpp:10:9: error: 'sc' was not declared in this scope
   while(sc.hasNext()){
         ^
0_0_27679591_21280.cpp:13:5: error: 'System' was not declared in this scope
     System.out.println(1);
     ^
0_0_27679591_21280.cpp:17:5: error: 'System' was not declared in this scope
     System.out.println((1+n)*(n/2));
     ^
0_0_27679591_21280.cpp:20:5: error: 'System' was not declared in this scope
     System.out.println((1+n)*(n/2)+(n+1)/2);
     ^


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