Vengeance
685 posts



A combination lock consists of 3 dials, each ranging from 0 to 9. The lock will open if your 3 digit guess matches the secret code in at least two positions. What is the minimum number of guesses required to guarantee that the lock opens, regardless of what the secret code is?














اگر بیشتر از ۳۵ سالته باید بدونی دیگه ارزشی توی SMV نداری و همینکه یکی ازت خوشش بیاد باید خدارو شکر کنی. زمان بسیار بیرحمه…


بچها امروز بهم گفتن اگه جای این ۶ ماه که نشستی واسه تخصص خوندی ، آلمانی میخوندی الان B2 داشتی و یه قدم واسه رفتن جلوتر بودی :))) متاسفانه حق با اوناست..


You are in a room with two faceless watches. Neither watch has a screen, but each features a red light and a blue light. The red light blinks exactly on the hour, every hour. The blue light blinks at an unknown time "x" past the hour (this time "x" is identical for every hour and on both watches). Each watch has a button. When pressed, the button reverses the watch's internal timer, causing it to run backward. Pressing the button again makes the timer resume running forward, and so on. You have no personal sense of time. After receiving the watches at time zero, you must eventually exit the room. If you exit after 90 minutes, you receive 0 dollars. If you exit at time "t" (where t <= 90 minutes), you receive "t" dollars. What is the maximum guaranteed amount of money you can collect?






