static long calculateSum ( int n , int k ) {
  long res = 1 ;
  long MOD = 1000000007 ;
  for ( int i = 0 ;
  i < k ;
  i ++ ) {
    res = ( res * n ) % MOD ;
  }
  return res ;
}

static long calculateSum ( int n , int k ) { long res = 1 ; long MOD = 1000000007 ; for ( int i = 0 ; i < k ; i ++ ) { res = ( res * n ) % MOD ; } return res ; }
(method_declaration (modifiers) type: (integral_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier)) (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) right: (identifier)))))) (return_statement (identifier))))