How to Solve Minimum Operations to Make a Special Number Problem
Master the Minimum Operations to Make a Special Number LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
Interview Coder generates complete solutions and debugging hints that you can use while explaining your approach, so you stay calm and in control.
Minimum Operations to Make a Special Number
You are given a 0-indexed string num representing a non-negative integer. In one operation, you can pick any digit of num and delete it. Note that if you delete all the digits of num, num becomes 0. R...
Interview Coder will help you solve this problem in real-time during your interview
✨ Get instant solutions, explanations, and code generation
Understanding the Minimum Operations to Make a Special Number Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You are given a 0-indexed string num representing a non-negative integer. In one operation, you can pick any digit of num and delete it. Note that if you delete all the digits of num, num becomes 0. Return the minimum number of operations required to make num special. An integer x is considered special if it is divisible by 25.
Minimum Operations to Make a Special Number
Related Topics
How Interview Coder Helps
Get real-time assistance for Minimum Operations to Make a Special Number problems during coding interviews. Interview Coder provides instant solutions and explanations.
Examples
num = "2245047"2Delete digits num[5] and num[6]. The resulting number is "22450" which is special since it is divisible by 25. It can be shown that 2 is the minimum number of operations required to get a special number.
num = "2908305"3Delete digits num[3], num[4], and num[6]. The resulting number is "2900" which is special since it is divisible by 25. It can be shown that 3 is the minimum number of operations required to get a special number.
num = "10"1Delete digit num[0]. The resulting number is "0" which is special since it is divisible by 25. It can be shown that 1 is the minimum number of operations required to get a special number.
Constraints
1 <= num.length <= 100num only consists of digits '0' through '9'.num does not contain any leading zeros.How Interview Coder Helps with Leetcode Problems
Trust anchors reduce friction for conversion. Reinforce undetectability claims, platform compatibility, user counts, and the free trial to remove perceived risk.
See Interview Coder in Action
Watch how Interview Coder helps solve LeetCode problems during live interviews
Undetectability Checklist
Platform Compatibility
User results and traction
More than 87,000 developers use Interview Coder and early launch metrics showed rapid adoption. Social proof signals that this approach helps real candidates land offers across a range of companies.
Undetectability and technical details
Our native desktop architecture avoids common detection vectors used by browser extensions. We provide a clear checklist so you can run basic checks and confirm the app will be invisible during live interviews.
Platform compatibility and limitations
We work with Zoom, HackerRank, CodeSignal, CoderPad and other web based platforms, with a known list of app version caveats. Check the compatibility note and request a browser link if a specific desktop app is unsupported.
Frequently Asked Questions
Common questions about solving Minimum Operations to Make a Special Number and using Interview Coder during coding interviews.
Interview Coder generates complete solutions instantly with proper complexity analysis, letting you focus on explaining your approach and demonstrating problem-solving skills rather than getting stuck on implementation details during high-pressure situations.
Ready to Get Started?
Download Interview Coder now and join thousands of developers who have aced their coding interviews