SGIFT  Sabbir and gifts
Sabbir is a little boy. he went to a gift shop with his mother. there were n different types of gifts in the shop . all gifts were attractive to sabbir. he wanted to buy all the gifts which are in price range . you are given prices of all the gifts and a , b . sabbir's mother need your help. please calculate the total amount of price of all gifts of that range for sabbir's mother.
Input
in the first line there will be n . number of gifts in the shop.
in the next line there will be n integers p_{1}, p_{2 }, p_{3 }... p_{n }denoting price of every gift
in the 3rd line there will be Q number of queries.
next Q lines contain two integes a and b
Output
print Q lines . every line contains one integer , sum of all prices for that range given in the query.
Example
Input: 7
1 3 2 1 5 2 2
4
1 2
1 5
3 5
4 5 Output: 8
16
8
5
NOTE: for first query sabbir will buy all the gifts of prices 1 , 2 , 1 , 2, 2 . so, sum is 8
for second query sabbir will buy all the gifts . so the sum is 16
hide comments
testing java:
20170911 15:13:07
What's the point of so strict time limit? I try to solve it in java, and because of time limits I do not know whether there is something wrong with algorithmic part of my code or I got TLE simply because my io isn't fast enough. It slightly spoils fun from solving problems Last edit: 20170911 15:46:33 

holmesherlock:
20170527 13:24:20
thanx a ton buddy @vengatesh15 

Shubham Jadhav:
20170517 20:26:11
O(n^2) works 

holmesherlock:
20170403 18:55:43
i guess my code is fine but it is giving runtime error ,:(


gogetgoogle:
20170313 13:44:15
when blue.mary got wa , its the test cases , not him XD 

shahzada:
20170304 11:18:59
Sabbir ,could you please tell me where i am getting wrong ? is there any problem in my algorithm or my approach.


vengatesh15:
20170303 10:43:04
use long long that cost me 1 WA but an easy one:) 

dwij28:
20170301 09:09:28
O(n*log(n) + q*log(n)) is an accepted solution :) 

itissabbir:
20170228 19:44:03
Akshay Venkataramani, your query function is not running in log(n) 

akshayvenkat:
20170228 08:42:59
Sabbir, could you tell me why my code is giving TLE? Is my algorithm inefficient?

Added by:  sabbir 
Date:  20170226 
Time limit:  0.200s0.5s 
Source limit:  50000B 
Memory limit:  1536MB 
Cluster:  Cube (Intel G860) 
Languages:  All 