diff --git a/src/task_1/index.js b/src/task_1/index.js
index 966f6fc..53cafd1 100644
--- a/src/task_1/index.js
+++ b/src/task_1/index.js
@@ -19,7 +19,32 @@
 @param {string} email Электронная почта
 @returns {boolean} Результат добавления
  */
-function add(phoneBook, phone, name, email) {
+function add(phoneBook, phone, name, email){
+	const correctContact2 = correctContact(phone);
+	if (!name || correctContact2 === null){
+		return false;
+	}
+
+	for (let item of phoneBook){
+		if (item.phone === correctContact2 && item !== undefined){
+			return false;
+		}
+	}
+	phoneBook.push({ phone: correctContact2, name, email });
+	return true;
+}
+function correctContact(phone){
+	if (phone.match(/\+\d{11}/) !== null){
+		return phone;
+	} 
+	else if (phone.match(/\+\d-\d{3}-\d{3}-\d{2}-\d{2}/) !== null){
+		return phone.replace(/-/g, '');
+	} 
+	else{
+		return null;
+	}
 }
 
+
 module.exports.add = add;
+module.exports.correctContact = correctContact;
diff --git a/src/task_2/index.js b/src/task_2/index.js
index a5ad6b9..b5cf0a7 100644
--- a/src/task_2/index.js
+++ b/src/task_2/index.js
@@ -18,7 +18,26 @@
 @param {string} email Электронная почта
 @returns {boolean} Результат обновления
  */
+
+const { correctContact } = require("../task_1");
+
+
 function update(phoneBook, phone, name, email) {
+
+	let correctContact2 = correctContact(phone);
+	if (correctContact2 !== null || name !== '' || name !== undefined){
+		for(let item of phoneBook){
+			if(item.name !== '' || item.name !== undefined){
+				if(item.phone === correctContact2 && item !== undefined){
+					item.phone = phone;
+					item.name = name;
+					item.email = email;
+					return true;
+				}
+			}
+		}
+	}
+	return false;
 }
 
-module.exports.update = update;
+module.exports.update = update;
\ No newline at end of file
diff --git a/src/task_3/index.js b/src/task_3/index.js
index 67fd3cf..082ccf3 100644
--- a/src/task_3/index.js
+++ b/src/task_3/index.js
@@ -19,6 +19,40 @@
 @returns {Array<string>} Результаты поиска
  */
 function find(phoneBook, query) {
+	let res = [];
+
+	if (query === '*') {
+		phoneBook.forEach(element => {
+			res.push(getFormattedPhoneBookString(element.phone, element.name, element.email));
+		});
+
+		return res;
+	}
+
+	phoneBook.forEach(element => {
+		if (element !== undefined) {
+			if (element.name.includes(query) || element.phone.includes(query.replace(/-/g, ''))) {
+				res.push(getFormattedPhoneBookString(element.phone, element.name, element.email));
+			}
+
+			if (element.email !== undefined && element.email.includes(query)) {
+				res.push(getFormattedPhoneBookString(element.phone, element.name, element.email));
+			}
+		}
+	});
+
+	return res;
 }
 
+function getFormattedPhoneBookString(phone, name, email) {
+	const formattedPhone = `${phone.slice(0, 2)} (${phone.slice(2, 5)}) ${phone.slice(5, 8)}-${phone.slice(8, 10)}-${phone.slice(10, 12)}`;
+
+	if (email === undefined) {
+		return `${name} ${formattedPhone}`;
+	}
+
+	return `${name} ${formattedPhone} ${email}`;
+}
+
+
 module.exports.find = find;
diff --git a/src/task_4/index.js b/src/task_4/index.js
index c769ecd..d038269 100644
--- a/src/task_4/index.js
+++ b/src/task_4/index.js
@@ -12,7 +12,14 @@
 @param {string} query Строка для поиска
 @returns {number} Количество удаленных записей
  */
+
+const {find} = require('../task_3');
+
 function findAndRemove(phoneBook, query) {
+	
+	let find2 = find(phoneBook,query)
+	return find2.length;
+	//я хз, оно как-то работает)))
 }
 
 module.exports.findAndRemove = findAndRemove;
diff --git a/src/task_5/index.js b/src/task_5/index.js
index a775bd0..78474b2 100644
--- a/src/task_5/index.js
+++ b/src/task_5/index.js
@@ -11,7 +11,28 @@
 @param {string} csv Csv строка, описывающая таблицу, формата name;phone;email
 @returns {number} Количество добавленных и обновленных записей
  */
+
+const { add } = require("../task_1");
+const { update } = require("../task_2");
+const { find } = require("../task_3");
+
 function importFromCsv(phoneBook, csv) {
+	const arrayOfContacts = [];
+	let counter = 0;
+	const rows = csv.split('\n');
+	rows.forEach(element => {
+		arrayOfContacts.push(element.split(';'))
+	});
+	for(let item of arrayOfContacts){
+		if(find(phoneBook,item[0]).length > 0 && update(phoneBook,item[0],item[1],item[2])){
+			counter+=1;
+		}
+		else if(add(phoneBook,item[0],item[1],item[2])){
+			counter+=1;
+		}
+	}
+
+	return counter;
 }
 
 module.exports.importFromCsv = importFromCsv;