Submit | All submissions | Best solutions | Back to list |
SUMPRO - SUM OF PRODUCT |
Given a number N, find the sum of all products x * y such that N / x = y (integer division).
Since the sum can be very large, please output this modulo 1000000007.
Input
The first line of input file contains an integer T, the number of test cases to follow. Each of the next T lines contain an integer N.
Output
Output T lines containing the answer to corresponding test case.
Example
Input: 3 2 4 6 Output: 4 15 33
Constraints:
1 ≤ T ≤ 500
1 ≤ N ≤ 109
Explanation
Case #1:
2 / 1 = 2
2 / 2 = 1
Answer = 1 * 2 + 2 * 1 = 4
Case #2:
4 / 1 = 4
4 / 2 = 2
4 / 3 = 1
4 / 4 = 1
Answer = 1 * 4 + 2 * 2 + 3 * 1 + 4 * 1 = 15
Added by: | ivar.raknahs |
Date: | 2015-01-23 |
Time limit: | 1s-1.5s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All |
Resource: | Own |
hide comments
|
||||||||
2024-11-30 13:31:50
very intersting!!! AC in one go! |
||||||||
2021-06-19 16:01:15
i got all the judges right except the master judge help Edit: use long for java instead of int Last edit: 2021-06-20 12:53:45 |
||||||||
2021-01-09 16:30:28 Rafail Loizou
TLE with O(sqrt(n)) solution and scanfs printf |
||||||||
2020-12-31 12:54:03
why i getting wrong answer ??upto test case 6 it showing correct. |
||||||||
2020-06-28 20:35:58 Shubham Jadhav
Beautiful Problem |
||||||||
2020-06-08 10:55:47
jut write down few test cases and observe. ex 12 |
||||||||
2020-05-18 18:24:41
Awwwww AC finally :D 1.43s 4.3M O(2*sqrt(n)) Hint: U need a pen and some white papers, try(ex N = 71) writing all x,y then... See, x:=1 to sqrt(N) u can use a loop as normally. With extant part, u can see y:=sqrt(N)-1 to 1 . Using math here hehehe. Interesting thing is the input is too big. |
||||||||
2020-05-08 20:24:42
Hi, can anyone please help me to solve this question in O(sqrt(n)). I am trying hard and ablw to solve in n/2 but not in sqrt(n). Please tell how to solve this. |
||||||||
2020-04-04 17:01:50
tejas_vi: sumbit in PyPy: https://www.spoj.com/ranks/SUMPRO/lang=PYPY2.4 .. but first check if your code really goes through 500 tests for n ~ 10^9 in 0.01s. |
||||||||
2020-04-04 15:23:59
Its an Easy question but my python code is showing (time limit exceeded) but on ideone the following message pops ((Success #stdin #stdout 0.01s 7184KB)), idk whats wrong with SPOJ |