diff --git a/app.py b/app.py
index 43d35e8..3db457c 100644
--- a/app.py
+++ b/app.py
@@ -1,11 +1,67 @@
-from flask import Flask
+from flask import Flask, request, jsonify
+import db
 
 app = Flask(__name__)
 
 
-@app.route('/')
-def hello_world():  # put application's code here
-    return 'Hello World!'
+def isEnd(cur, trueChatID):
+    # cur.execute(f"SELECT ChatID FROM Chats WHERE TrueChatID = '{trueChatID}'")
+    # row = cur.fetchall()
+    # chatID = row[0]
+    #
+    # cur.execute(f"SELECT UserID FROM UsersChats WHERE ChatID = '{chatID}'")
+    # usersIDs = cur.fetchall()
+    #
+    # allAlive = True
+    # for id in usersIDs:
+    #     cur.execute(f"SELECT isAlive FROM Users WHERE UserID = '{id}', role = ")
+    #     row = cur.fetchall()
+    #     if row[0] == False:
+    #         allAlive = False
+
+    cur.execute(f"Select role from chats join userschats uc on uc.chatid = chats.chatid join "
+                f"users on users.userid = uc.userid where truechatid = '{trueChatID}' and isAlive = true")
+    roles = cur.fetchall()
+
+    m = roles.count(4)
+    if m == 0:
+        return "citizens"
+    elif m >= len(roles) - m:
+        return "mafia"
+
+    return ""
+
+
+@app.route('/action', methods=["POST"])
+def action():  # put application's code here
+    data = request.json
+    trueChatID = data['chatID']
+    killedUserID = data['KilledUserID']
+    healedUserID = data['HealedUserID']
+    checkedUserID = data['CheckedUserID']
+
+    response = {
+        "killedUserId": "",
+        "isEndGame": "",
+        "checkedRole": False
+    }
+
+    cur = db.cursor
+
+    if killedUserID != healedUserID:
+        cur.execute(f"UPDATE Users SET isAlive = false WHERE TrueUserID = '{killedUserID}'")
+        response["killedUserId"] = killedUserID
+
+    cur.execute(f"SELECT role FROM users WHERE TrueUserID ='{checkedUserID}';")
+    row = cur.fetchall()
+    role = row[0]
+
+    if role == 4:
+        response["checkedRole"] = True
+
+    response["isEndGame"] = isEnd(cur, trueChatID)
+
+    return jsonify(response), 200
 
 
 if __name__ == '__main__':
diff --git a/db.py b/db.py
index 2e604e4..4ece3e4 100644
--- a/db.py
+++ b/db.py
@@ -3,7 +3,7 @@ import psycopg2
 
 db_params = {
     'host': '51.250.68.42',
-    'database': 'test',
+    'database': 'postgres',
     'user': 'curator',
     'password': '4oumQk'
 }
@@ -15,7 +15,9 @@ try:
 
     # Ваш код выполнения запросов
 
-    cursor.execute("SELECT * FROM chats")
+    cursor.execute(f"Select role from chats join userschats uc on uc.chatid = "
+                f"chats.chatid join users on users.userid = uc.userid where truechatid = '{7656}' and isAlive = true")
+
     rows = cursor.fetchall()
 
     for row in rows: