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BSEARCH1 - Binary search |
You are given a sorted array of numbers, and followed by number of queries, for each query if the queried number is present in the array print its position, else print -1.
Input
First line contains N Q, number of elements in the array and number of queries to follow.
Second line contains N numbers, the elements of the array. Each number will be -10^9 <= ai <= 10^9, 0 < N <= 10^5, 0 < Q <= 5*10^5
Output
For each element in the query, print the elements 0 based location of its first occurence, if present, otherwise print -1.
Example
Input: 5 4 2 4 7 7 9 7 10 4 2 Output: 2 -1 1 0
Added by: | jack(chakradarraju) |
Date: | 2012-03-13 |
Time limit: | 1s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All |
Resource: | NITT Class |
hide comments
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2015-08-25 06:36:49
yes got accepted when i used 1st occurence concept. |
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2015-08-11 19:08:10
how i can optimize this more <snip> Last edit: 2023-05-12 09:12:17 |
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2015-04-01 02:44:17 bestknighter
After 3 days of a lot of optimizations, I did it right. It wasn't exactly a binary search, all printings were at the end of the program, I used long int and printf, scanf. Got 0.22s. From TLE to AC... PHEW! |
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2015-03-26 09:18:48 karan
i mean WHAT THE HELL.. iostream why are u so slow.. i am never going to use u again.. tried around 7 different methods using maps as well in such a simple problem.. problem lied in i/o method.. Bjarne,man why u made c++ so slow.. Last edit: 2015-03-26 09:19:30 |
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2015-01-26 10:31:38 Madhav
pay attention to the first occurence!! |
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2014-12-30 23:47:44 Leandro de Andrade Moura [UFPE]
Attention to negative values! |
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2014-10-13 22:41:08 CHANDAN KUMAR
<snip> please tell me what is going wrong with my code please help me is it stackoverflow or something else at 6th test case it is showing wrong answer Last edit: 2023-05-12 09:12:40 |
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2014-08-15 18:46:57 Asheesh Pathak
Learned something new! :D Last edit: 2014-08-15 18:56:55 |
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2014-06-17 22:14:35 shade_1
WA after test case 6 although i am printing first occurrence of the number and using long long . |
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2014-05-25 21:18:52 Raphael GuimarĂ£es
Pay attention to sequences like: 1 2 2 3 4 The first occurence is 1! |