diff --git a/package-lock.json b/package-lock.json
index e20190a..aea54a1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5,7 +5,6 @@
   "requires": true,
   "packages": {
     "": {
-      "name": "js-task-3",
       "version": "1.0.0",
       "license": "ISC",
       "devDependencies": {
@@ -10715,13 +10714,6 @@
       "integrity": "sha1-FQStJSMVjKpA20onh8sBQRmU6k8=",
       "dev": true
     },
-    "fsevents": {
-      "version": "2.3.2",
-      "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.2.tgz",
-      "integrity": "sha512-xiqMQR4xAeHTuB9uWm+fFRcIOgKBMiOBP+eXiyT7jsgVCq1bkVygt00oASowB7EdtpOHaaPgKt812P9ab+DDKA==",
-      "dev": true,
-      "optional": true
-    },
     "function-bind": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.1.tgz",
diff --git a/topic-3/task-1/index.js b/topic-3/task-1/index.js
index 94ab761..fff6b80 100644
--- a/topic-3/task-1/index.js
+++ b/topic-3/task-1/index.js
@@ -17,6 +17,18 @@
 @param {number} minutes - Минуты
  */
 function Time(hours, minutes) {
-}
+    if (hours < 0 || hours > 24 || minutes < 0 || minutes > 60 
+		|| !Number.isInteger(hours) || !Number.isInteger(minutes)){
+        throw new UserException('Invalid time');
+    };
+    this.hours = hours;
+    this.minutes = minutes;
+};
+Time.prototype.isEarlier = function(time){
+    return time.hours * 60 + time.minutes > this.hours * 60 + this.minutes;
+};
+Time.prototype.isLater = function(time){
+    return !this.isEarlier(time);
+};
 
 module.exports.Time = Time;
\ No newline at end of file
diff --git a/topic-3/task-2/index.js b/topic-3/task-2/index.js
index 166c7d1..179f894 100644
--- a/topic-3/task-2/index.js
+++ b/topic-3/task-2/index.js
@@ -16,7 +16,18 @@
 @param {Time} startTime - Время начала встречи
 @param {Time} endTime - Время конца встречи
  */
+const {Time} = require("../task-1");
 function Meeting(meetingDate, startTime, endTime) {
-}
+    if (startTime.hours < 8 || endTime.hours > 19 || startTime > endTime 
+		|| !(meetingDate instanceof Date) || !(startTime instanceof Time) || !(endTime instanceof Time)){
+        throw new UserException('Invalid time');
+    };
+    this.meetingDate = meetingDate;
+    this.startTime = startTime;
+    this.endTime = endTime;
+};
+Meeting.prototype.isMeetingInTimeRange = function(start, end) {
+    return start.isEarlier(this.endTime) && end.isLater(this.startTime);
+};
 
 module.exports.Meeting = Meeting;
\ No newline at end of file
diff --git a/topic-3/task-3/index.js b/topic-3/task-3/index.js
index b5ff228..d944d72 100644
--- a/topic-3/task-3/index.js
+++ b/topic-3/task-3/index.js
@@ -12,7 +12,15 @@
  */
 
 function Vacation(vacationStartDate, vacationEndDate) {
+    if (!(vacationEndDate instanceof Date && vacationStartDate instanceof Date) || (vacationStartDate >= vacationEndDate)){
+        throw new UserException ("Invalid date vacation");
+    };
+    this.vacationStartDate = vacationStartDate;
+    this.vacationEndDate = vacationEndDate;
+};
+Vacation.prototype.isDateInVacation = function(date){
+    return date >= this.vacationStartDate && date <= this.vacationEndDate; 
 
-}
+};
 
 module.exports.Vacation = Vacation;
\ No newline at end of file
diff --git a/topic-3/task-4/index.js b/topic-3/task-4/index.js
index 7d670e8..15f07ea 100644
--- a/topic-3/task-4/index.js
+++ b/topic-3/task-4/index.js
@@ -8,7 +8,16 @@
 @param {Array<Vacation>} vacations - Массив отпусков
  */
 
-function Organaizer(meetings = [], vacations = []) { 
+const { Meeting } = require("../task-2");
+const { Vacation } = require("../task-3");
+
+function Organaizer(meetings = [], vacations = []){ 
+    if(!Array.isArray(meetings) || !Array.isArray(vacations) 
+    ||meetings.some(x => !(x instanceof Meeting)) || meetings.some(x => !(x instanceof Vacation))){
+        throw new UserException("Invalid Array");
+    };
+    this.meetings = meetings;
+    this.vacations = vacations;
 };
 
 module.exports.Organaizer = Organaizer;
\ No newline at end of file