Kêu tìm số lớn nhất cái nó hiểu thành tìm số nhỏ nhất, seo mày ngoo wa zị Niu???
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"Find the biggest number in an array" hay sao bạn ?
Interview đừng hỏi bài đó bạn ơi, mà hỏi bài này nè: Given an infinite sequence: 1234567891011121314151617... Find the value of the nth digit, e.g with n = 1000 E.g: * 7th is 7 * For integer number 10: 10th is 1, 11th is 0* * For integer number 11: 12th is 1, 13th is 1 and so ... So find the value of n=1000 in that sequence
@embedded dev: đọc đề xong nhức đầu wa nha a iu
Thank you Mỹ Nhun đã reply anh nha. Để Mỹ Nhun khỏi nhức đầu thì a cho Mỹ Nhun đáp án nè. From 1 to 9, there are 1 digits. From 10 to 99 (90 numbers with 2 digits in each number), there are 2*90 = 180 digit From 100 to 999 (900 numbers with 3 digits), there are 3*900 = 2700 digits For 10th: 10 = 9 + 1, this indicate that at 10th, it reaches the first 9 numbers (1 to 9) then move to the next number. So 10th will be the 1st digit of integer number 10, which is 1 11st: 11 = 9 + 2 = 9 + 2*1. So 11th will lie in the 2nd digit of 10, which is 0 Apply that logic and analysist for 1000th: 1000 = 9 +180 + 3*270+1 It means at 1000th, it has reached the 270th integer number after 99 (integer number 99+270=369), then move to the next number, 370, as its first digit (the +1 left) So 1000th will lie in the 1st digit of 370, which is 3
A viết nhầm chỗ "From 1 to 9" nha Mỹ Nhun, phải là: From 1 to 9, there are 1 * 9 = 9 digits. Bonus thêm phần analyse cho các value nth khác: 12st = 9 + 2*1 + 1. 2*1 indicates 12th has reached the first integer number (with 2 digits) after integer number 9, then moves to the next number as its first digit (+1) 13rd: 13 = 9 + 2*2. So 13rd has reached 2 integers number after integer number 9, which is intger number 11. So 13rd lies in the 2nd digit of 11, which is 1
