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def get_str_of_intervals(arr: []) -> str:
    if not arr:
        return ''
    breaks = []
    arr.sort()
    start = end = arr[0]
    for i in arr[1:]:
        diff = i - end
        if diff == 1:
            end = i

ruan65

import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

const appSupportedLocales = <Locale>[
  Locale('ru'),
  Locale('en'),
];

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syntax="proto3";

message Student {
  int32 id = 1;
  string name = 2;
}

message Question {
  int32 id = 1;
  string text = 2;

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import 'dart:math';

import 'package:grpc/src/server/call.dart';
import 'package:grpc/grpc.dart' as grpc;
import 'package:umka/questions_db_driver.dart';

import 'generated/umka.pbgrpc.dart';

class UmkaService extends UmkaServiceBase {

ruan65

import 'dart:io';

import 'package:grpc/grpc.dart';

import 'generated/umka.pbgrpc.dart';

class UmkaTerminalClient {
  late final ClientChannel channel;
  late final UmkaClient stub;

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/// copyright 2020, roipeker

class FormValidations {
  static String email(String val) {
    val = val.trim();
    if (val.isEmpty) return 'Email cant be empty';
    if (val.length <= 4) return 'Email is too short';
    if (!val.isEmail) return 'Invalid email';
    return null;
  }

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void main() async {
  
  Future.delayed(Duration(milliseconds: 500)).then((_) {
    print('hi');
  });
  print('hello');
  
  await Future.delayed(Duration(milliseconds: 1000));
  print('hi');

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extension Normalize on num {
  num normalized(
    num selfRangeMin,
    num selfRangeMax, [
    num normalizedRangeMin = 0.0,
    num normalizedRangeMax = 1.0,
  ]) =>
      (normalizedRangeMax - normalizedRangeMin) *
          ((this - selfRangeMin) / (selfRangeMax - selfRangeMin)) +
      normalizedRangeMin;

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extension CompactMap<T> on Iterable<T?> {
  Iterable<T> compactMap<E>([E? Function(T?)? transform]) =>
      map(transform ?? (e) => e).where((e) => e != null).cast();
}

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{
	"Flutter App Example Scaffold": {
		"scope": "dart",
		"prefix": "fsapp",
		"body": [
			"import 'package:flutter/material.dart';",
			"",
			"void main() {",
			"  runApp(MaterialApp(",
			"title: 'Flutter Demo',",