public static void main ( String [ ] args ) {
  SC sc = new SC ( System . in ) ;
  int N = sc . nextInt ( ) ;
  int K = sc . nextInt ( ) ;
  int [ ] sleep = new int [ N + 1 ] ;
  sleep [ 0 ] = 0 ;
  for ( int i = 1 ;
  i <= N ;
  i ++ ) {
    sleep [ i ] = sc . nextInt ( ) + sleep [ i - 1 ] ;
  }
  for ( int i = 3 ;
  i <= N ;
  i ++ ) {
    if ( sleep [ i ] - sleep [ i - 3 ] < K ) {
      pl ( i ) ;
      System . exit ( 0 ) ;
    }
  }
  pl ( - 1 ) ;
}

public static void main ( String [ ] args ) { SC sc = new SC ( System . in ) ; int N = sc . nextInt ( ) ; int K = sc . nextInt ( ) ; int [ ] sleep = new int [ N + 1 ] ; sleep [ 0 ] = 0 ; for ( int i = 1 ; i <= N ; i ++ ) { sleep [ i ] = sc . nextInt ( ) + sleep [ i - 1 ] ; } for ( int i = 3 ; i <= N ; i ++ ) { if ( sleep [ i ] - sleep [ i - 3 ] < K ) { pl ( i ) ; System . exit ( 0 ) ; } } pl ( - 1 ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (field_access object: (identifier) field: (identifier)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (binary_expression left: (identifier) right: (decimal_integer_literal)))))) (expression_statement (assignment_expression left: (array_access array: (identifier) index: (decimal_integer_literal)) right: (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: (array_access array: (identifier) index: (identifier)) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (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 (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (array_access array: (identifier) index: (identifier)) right: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (identifier))) consequence: (block (expression_statement (method_invocation name: (identifier) arguments: (argument_list (identifier)))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal)))))))) (expression_statement (method_invocation name: (identifier) arguments: (argument_list (unary_expression operand: (decimal_integer_literal)))))))