Geometry LeetCode Problems: 33 Python Solutions

1 pattern

How Geometry problems are solved

A tag names the subject, not the method. These pattern hubs cover the techniques that actually solve Geometry problems — each one explains the approach, gives a Python template and states its complexity.

Math and Number TheoryFind the closed form, the invariant, or the modular identity — and skip the loop entirely.

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When the Geometry problem arrives live.

In the live round, Stealth Interview reads the problem off your screen, returns a working solution with a step-by-step explanation and its time and space complexity, and transcribes what the interviewer says. It's a desktop app for macOS and Windows, invisible to screen sharing.

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python

Please analyze this context and help me answer the question or solve the problem.

Technical interview · 45 minsolution.pyShared editor · Python 3Longest substring without repeatsMediumGiven a string s, return the length of the longest contiguous substring in which every character is unique.s = "abcabcbb"
→ 31def length_of_longest_substring(s: str) -> int:2 last_seen = {}3 left = best = 04 for right, ch in enumerate(s):5 if ch in last_seen and last_seen[ch] >= left:

python

def length_of_longest_substring(s: str) -> int:    last_seen = {}                    # char -> index    left = best = 0    for right, ch in enumerate(s):        if ch in last_seen and last_seen[ch] >= left:            left = last_seen[ch] + 1  # jump past it        last_seen[ch] = right        best = max(best, right - left + 1)    return best    last_seen = {}                    # char -> index

Approach

At each index r, the window's left edge is:

left r = max (left r -1, last[s r] + 1)

Time O(n): each character enters and leaves the window once.
Space O(min(n, k)): k is the size of the character set.

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GPT-6.1 Terra

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python

Please analyze this context and help me answer the question or solve the problem.

Technical interview · 45 minsolution.pyShared editor · Python 3Longest substring without repeatsMediumGiven a string s, return the length of the longest contiguous substring in which every character is unique.s = "abcabcbb"
→ 31def length_of_longest_substring(s: str) -> int:2 last_seen = {}3 left = best = 04 for right, ch in enumerate(s):5 if ch in last_seen and last_seen[ch] >= left:

python

def length_of_longest_substring(s: str) -> int:    last_seen = {}                    # char -> index    left = best = 0    for right, ch in enumerate(s):        if ch in last_seen and last_seen[ch] >= left:            left = last_seen[ch] + 1  # jump past it        last_seen[ch] = right        best = max(best, right - left + 1)    return best    last_seen = {}                    # char -> index

Approach

At each index r, the window's left edge is:

left r = max (left r -1, last[s r] + 1)

Time O(n): each character enters and leaves the window once.
Space O(min(n, k)): k is the size of the character set.

Type your message...

GPT-6.1 TerraClear chat

QuitEscHide+QCapture+PCrop+OSubmit+EnterPress to get answerLeft/Right+Up/Down+

90%Subscription

python

Please analyze this context and help me answer the question or solve the problem.

Technical interview · 45 minsolution.pyShared editor · Python 3Longest substring without repeatsMediumGiven a string s, return the length of the longest contiguous substring in which every character is unique.s = "abcabcbb"
→ 31def length_of_longest_substring(s: str) -> int:2 last_seen = {}3 left = best = 04 for right, ch in enumerate(s):5 if ch in last_seen and last_seen[ch] >= left:

python

def length_of_longest_substring(s: str) -> int:    last_seen = {}                    # char -> index    left = best = 0    for right, ch in enumerate(s):        if ch in last_seen and last_seen[ch] >= left:            left = last_seen[ch] + 1  # jump past it        last_seen[ch] = right        best = max(best, right - left + 1)    return best    last_seen = {}                    # char -> index

Approach

At each index r, the window's left edge is:

left r = max (left r -1, last[s r] + 1)

Time O(n): each character enters and leaves the window once.
Space O(min(n, k)): k is the size of the character set.

Type your message...

GPT-6.1 TerraClear chat

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QuitEscHide+QCapture+PCrop+OSubmit+EnterPress to get answerLeft/Right+Up/Down+

Geometry problems by difficulty

Problems with a complete Python solution are listed first, then by ascending problem number.

Easy (9)

Easy problems
No.	Problem	Topics
0812	Largest Triangle Area	Geometry, Array, Math
0836	Rectangle Overlap	Geometry, Math
0883	Projection Area of 3D Shapes	Geometry, Array, Math +1
0892	Surface Area of 3D Shapes	Geometry, Array, Math +1
1030	Matrix Cells in Distance Order	Geometry, Array, Math +2
1037	Valid Boomerang	Geometry, Array, Math
1232	Check If It Is a Straight Line	Geometry, Array, Math
1266	Minimum Time Visiting All Points	Geometry, Array, Math
2481	Minimum Cuts to Divide a Circle	Geometry, Math

Medium (14)

Medium problems
No.	Problem	Topics
0223	Rectangle Area	Geometry, Math
0478	Generate Random Point in a Circle	Geometry, Math, Rejection Sampling +1
0593	Valid Square	Geometry, Math
0858	Mirror Reflection	Geometry, Math, Number Theory
0939	Minimum Area Rectangle	Geometry, Array, Hash Table +2
0963	Minimum Area Rectangle II	Geometry, Array, Hash Table +1
0973	K Closest Points to Origin	Geometry, Array, Math +4
1401	Circle and Rectangle Overlapping	Geometry, Math
1828	Queries on Number of Points Inside a Circle	Geometry, Array, Math
2101	Detonate the Maximum Bombs	Depth-First Search, Breadth-First Search, Graph +3
2249	Count Lattice Points Inside a Circle	Geometry, Array, Hash Table +2
2280	Minimum Lines to Represent a Line Chart	Geometry, Array, Math +2
0469	Convex PolygonPremium	Geometry, Array, Math
2152	Minimum Number of Lines to Cover PointsPremium	Bit Manipulation, Geometry, Array +5

Hard (10)

Hard problems
No.	Problem	Topics
0149	Max Points on a Line	Geometry, Array, Hash Table +1
0335	Self Crossing	Geometry, Array, Math
0391	Perfect Rectangle	Geometry, Array, Hash Table +2
0587	Erect the Fence	Geometry, Array, Math
1453	Maximum Number of Darts Inside of a Circular Dartboard	Geometry, Array, Math
1515	Best Position for a Service Centre	Geometry, Array, Math +1
1610	Maximum Number of Visible Points	Geometry, Array, Math +2
1924	Erect the Fence IIPremium	Geometry, Array, Math
1956	Minimum Time For K Virus Variants to SpreadPremium	Geometry, Array, Math +2
2613	Beautiful PairsPremium	Geometry, Array, Math +3

Geometry LeetCode Problems: All 33,
With Python Solutions

How Geometry problems are solved

When the Geometry problem arrives live.

Approach

Approach

Approach

Geometry problems by difficulty

Easy (9)

Medium (14)

Hard (10)

Keep exploring

How Geometry problems are solved

When the Geometry problem arrives live.

Approach

Approach

Approach

Geometry problems by difficulty

Easy (9)9

Medium (14)14

Hard (10)10

Keep exploring

Easy (9)

Medium (14)

Hard (10)