Problem
Leaderboard
🎁 November Giveaway
This November, you have the opportunity to hone your skills and win the Macbook Air, Sony WH-1000XM4 headphones, $50 gift card and much more.
🎮 How to Play
Complete Educative’s daily coding challenge all month.
Choose your preferred programming language before you start, you can switch it anytime, even mid-problem.
Be mindful of your attempts, you only get a limited number, so make each one count.
Keep your streak alive, the longer it runs, the more raffle entry tickets you rack up.
Earn tickets and increase your chances of winning the draw.
🎟️ How to earn Tickets
ActionTickets Earned
Complete Daily Challenge
+1
10-Day Streak
+10
20-Day Streak
+20
30-Day Streak
+30
LinkedIn post with #30DaysofCode Everyday (and tag Educative)
+2 per post
Most-Liked Post Overall
+20
Top of Leaderboard
+50
Leaderboard: 2nd place
+30
Leaderboard: 3rd place
+20

Problem: Valid Digit Number

Statement

Given two integers n and x, determine whether n is a valid digit number with respect to x.

An integer n is considered valid if:

  • The decimal representation of n contains the digit x.

  • The leading digit of n is not equal to x.

Return true if n satisfies both conditions, and false otherwise.

Constraints:

  • 0≤0 \leq n ≤105\leq 10^5

  • 0≤0 \leq x ≤9\leq 9

Problem
Leaderboard
🎁 November Giveaway
This November, you have the opportunity to hone your skills and win the Macbook Air, Sony WH-1000XM4 headphones, $50 gift card and much more.
🎮 How to Play
Complete Educative’s daily coding challenge all month.
Choose your preferred programming language before you start, you can switch it anytime, even mid-problem.
Be mindful of your attempts, you only get a limited number, so make each one count.
Keep your streak alive, the longer it runs, the more raffle entry tickets you rack up.
Earn tickets and increase your chances of winning the draw.
🎟️ How to earn Tickets
ActionTickets Earned
Complete Daily Challenge
+1
10-Day Streak
+10
20-Day Streak
+20
30-Day Streak
+30
LinkedIn post with #30DaysofCode Everyday (and tag Educative)
+2 per post
Most-Liked Post Overall
+20
Top of Leaderboard
+50
Leaderboard: 2nd place
+30
Leaderboard: 3rd place
+20

Problem: Valid Digit Number

Statement

Given two integers n and x, determine whether n is a valid digit number with respect to x.

An integer n is considered valid if:

  • The decimal representation of n contains the digit x.

  • The leading digit of n is not equal to x.

Return true if n satisfies both conditions, and false otherwise.

Constraints:

  • 0≤0 \leq n ≤105\leq 10^5

  • 0≤0 \leq x ≤9\leq 9