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264 | 264 | 1428 | [Leftmost Column with at Least a One](https://leetcode.com/problems/leftmost-column-with-at-least-a-one/)| [C++](./C++/leftmost-column-with-at-least-a-one.cpp) [Python](./Python/leftmost-column-with-at-least-a-one.py) | _O(m + n)_ | _O(1)_ | Medium | 🔒 |
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265 | 265 | 1431 | [Kids With the Greatest Number of Candies](https://leetcode.com/problems/kids-with-the-greatest-number-of-candies/) | [C++](./C++/kids-with-the-greatest-number-of-candies.cpp) [Python](./Python/kids-with-the-greatest-number-of-candies.py) | _O(n)_ | _O(1)_ | Easy ||
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266 | 266 | 1437 | [Check If All 1's Are at Least Length K Places Away](https://leetcode.com/problems/check-if-all-1s-are-at-least-length-k-places-away/) | [C++](./C++/check-if-all-1s-are-at-least-length-k-places-away.cpp) [Python](./Python/check-if-all-1s-are-at-least-length-k-places-away.py) | _O(n)_ | _O(1)_ | Medium ||
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| 267 | +1450 | [Number of Students Doing Homework at a Given Time](https://leetcode.com/problems/number-of-students-doing-homework-at-a-given-time/) | [C++](./C++/number-of-students-doing-homework-at-a-given-time.cpp) [Python](./Python/number-of-students-doing-homework-at-a-given-time.py) | _O(n)_ | _O(1)_ | Easy || |
267 | 268 |
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268 | 269 | ## String
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269 | 270 | | # | Title | Solution | Time | Space | Difficulty | Tag | Note|
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650 | 651 | 1207| [Unique Number of Occurrences](https://leetcode.com/problems/unique-number-of-occurrences/) | [C++](./C++/unique-number-of-occurrences.cpp) [Python](./Python/unique-number-of-occurrences.py) | _O(n)_ | _O(n)_ | Easy |||
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651 | 652 | 1224| [Maximum Equal Frequency](https://leetcode.com/problems/maximum-equal-frequency/) | [C++](./C++/maximum-equal-frequency.cpp) [Python](./Python/maximum-equal-frequency.py) | _O(n)_ | _O(n)_ | Hard |||
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652 | 653 | 1418| [Display Table of Food Orders in a Restaurant](https://leetcode.com/problems/display-table-of-food-orders-in-a-restaurant/) | [C++](./C++/display-table-of-food-orders-in-a-restaurant.cpp) [Python](./Python/display-table-of-food-orders-in-a-restaurant.py) | _O(n + tlogt + flogf)_ | _O(n)_ | Medium |||
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| 654 | +1452| [People Whose List of Favorite Companies Is Not a Subset of Another List](https://leetcode.com/problems/people-whose-list-of-favorite-companies-is-not-a-subset-of-another-list/) | [C++](./C++/people-whose-list-of-favorite-companies-is-not-a-subset-of-another-list.cpp) [Python](./Python/people-whose-list-of-favorite-companies-is-not-a-subset-of-another-list.py) | _O(n * m * l + n^2 * m)_ | _O(n * m * l)_ | Medium || |
653 | 655 |
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654 | 656 | ## Math
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655 | 657 | | # | Title | Solution | Time | Space | Difficulty | Tag | Note|
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824 | 826 | 1356| [Sort Integers by The Number of 1 Bits](https://leetcode.com/problems/sort-integers-by-the-number-of-1-bits/) | [C++](./C++/sort-integers-by-the-number-of-1-bits.cpp) [Python](./Python/sort-integers-by-the-number-of-1-bits.py) | _O(nlogn)_ | _O(1)_ | Easy || Bit Manipulation
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825 | 827 | 1365| [How Many Numbers Are Smaller Than the Current Number](https://leetcode.com/problems/how-many-numbers-are-smaller-than-the-current-number/) | [C++](./C++/how-many-numbers-are-smaller-than-the-current-number.cpp) [Python](./Python/how-many-numbers-are-smaller-than-the-current-number.py) | _O(n + m)_ | _O(m)_ | Easy || Counting Sort
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826 | 828 | 1366| [Rank Teams by Votes](https://leetcode.com/problems/rank-teams-by-votes/) | [C++](./C++/rank-teams-by-votes.cpp) [Python](./Python/rank-teams-by-votes.py) | _O(m * (n + mlogm))_ | _O(m^2)_ | Medium ||
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| 829 | +1451| [Rearrange Words in a Sentence](https://leetcode.com/problems/rearrange-words-in-a-sentence/) | [C++](./C++/rearrange-words-in-a-sentence.cpp) [Python](./Python/rearrange-words-in-a-sentence.py) | _O(nlogn)_ | _O(n)_ | Medium || String |
827 | 830 |
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828 | 831 | ## Two Pointers
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829 | 832 | | # | Title | Solution | Time | Space | Difficulty | Tag | Note|
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1387 | 1390 | |-----|---------------- | --------------- | --------------- | --------------- | ------------- |--------------|-----|
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1388 | 1391 | 0587 | [Erect the Fence](https://leetcode.com/problems/erect-the-fence/) | [C++](./C++/erect-the-fence.cpp) [Python](./Python/erect-the-fence.py) | _O(nlogn)_| _O(n)_| Hard || Convex Hull, `Monotone Chain` |
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1389 | 1392 | 0892 | [Surface Area of 3D Shapes](https://leetcode.com/problems/surface-area-of-3d-shapes/) | [C++](./C++/surface-area-of-3d-shapes.cpp) [Python](./Python/surface-area-of-3d-shapes.py) | _O(n^2)_| _O(1)_| Easy |||
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| 1393 | +1453 | [Maximum Number of Darts Inside of a Circular Dartboard](https://leetcode.com/problems/maximum-number-of-darts-inside-of-a-circular-dartboard/) | [C++](./C++/maximum-number-of-darts-inside-of-a-circular-dartboard.cpp) [Python](./Python/maximum-number-of-darts-inside-of-a-circular-dartboard.py) | _O(n^2 * logn)_| _O(n)_| Hard ||| |
1390 | 1394 |
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1391 | 1395 | ## Simulation
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1392 | 1396 | | # | Title | Solution | Time | Space | Difficulty | Tag | Note|
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