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Help in Mo's Algorithm Problem 877F
In Problem 877F , how to apply Mo's algorithm ? while traversing each block what to do ? editorial is not well explained ! __ Suppose a[] = { 1 , 1 , 1 , -1 } . We want to get all subarray's in the range 2--4 with sum = 1 .
Approach with HashMap would be linear complexity and total Time Complexity would be O(N*Q) if there are q queries ! **** how to reduce it to sqrt. decomposition ! Any idea ! __
| Rev. | Язык | Кто | Когда | Δ | Комментарий | |
|---|---|---|---|---|---|---|
| en7 |
|
do_good_ | 2019-02-06 09:17:46 | 4 | ||
| en6 |
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do_good_ | 2019-02-06 09:17:27 | 11 | Tiny change: 'mposition ! Any idea ** ' -> 'mposition . ** ' | |
| en5 |
|
do_good_ | 2019-02-06 09:17:06 | 6 | ||
| en4 |
|
do_good_ | 2019-02-06 06:55:12 | 12 | ||
| en3 |
|
do_good_ | 2019-02-06 00:05:51 | 6 | ||
| en2 |
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do_good_ | 2019-02-06 00:05:27 | 14 | ||
| en1 |
|
do_good_ | 2019-02-06 00:05:02 | 532 | Initial revision (published) |
