Problem database last updated: June 20, 2025
3 problems · 1 Easy, 1 Medium, 1 Hard · Ranked #343 of 458
1 Easy
33% · avg 23%
1 Medium
33% · avg 59%
1 Hard
33% · avg 18%
Based on 3 reported problems, PayPay interviews are significantly harder than average - 33% Hard vs 18% across all companies.
Compared to the industry average, PayPay puts unusual emphasis on string (66.7% of problems, 2.4x the industry average). If you're short on time, these are the categories to double down on.
The most common topics are string (66.7%), array (33.3%), binary-search (33.3%), binary-indexed-tree (33.3%). Problems below are sorted by frequency, the ones at the top are asked most often.
| Problem | Difficulty | Frequency | Topics | |
|---|---|---|---|---|
Largest 3-Same-Digit Number in String You are given a string num representing a large integer. An integer is good if it meets the following conditions: | Easy | Very Likely | string | Solve |
Block Placement Queries There exists an infinite number line, with its origin at 0 and extending towards the positive x-axis. | Hard | Likely | arraybinary-searchbinary-indexed-tree | Solve |
Zigzag Conversion The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better... | Medium | Likely | string | Solve |
Largest 3-Same-Digit Number in String
SolveYou are given a string num representing a large integer. An integer is good if it meets the following conditions:
Block Placement Queries
SolveThere exists an infinite number line, with its origin at 0 and extending towards the positive x-axis.
Zigzag Conversion
SolveThe string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better...
Frequency scores are based on crowdsourced interview reports. A higher score means the problem has been reported more often in recent PayPay interviews.
Very Likely
75-100%
Likely
50-74%
Sometimes
25-49%
Rare
0-24%
PayPay interviews focus heavily on string, array, binary-search problems. If you're short on time, these are the categories to prioritize. The problems on this page are sorted by frequency, so start from the top and work your way down.
Beyond solving problems, practice explaining your approach. PayPay interviewers care about your thought process - how you break down a problem, consider edge cases, and evaluate tradeoffs between solutions. A clean O(n) solution you can explain clearly beats an O(log n) solution you can't articulate.
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PayPay has been reported to ask 3 distinct coding problems. The most common topics are string, array, binary-search. 1 are Easy difficulty, 1 are Medium, and 1 are Hard. Problems are sorted by frequency - the ones at the top are asked most often.
Based on 3 reported problems, PayPay interviews are significantly harder than average - 33% Hard vs 18% across all companies. 33% of questions are Medium difficulty. Focus on the high-frequency Medium problems first, then work through the Hard ones.
Start with the highest-frequency problems listed on this page. Focus on the core topics: string, array, binary-search. Practice solving them under time pressure and explaining your approach out loud. Mock interviews with AI can simulate the real experience.
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