CADYDIST - Candy Distribution

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Alice is a teacher that loves her students. As the school year reaches its end, she wants to reward all her students with candies for all their hard work.

Since each of her classes is unique, she decided she’ll give a different kind of candy for each class, and in order to avoid students being mad at others in their class, she wants to make things fair by giving all students in the same class the same kind of candy.

Happily, she went to the candy shop, and fortunately found out that it had N different types of candy, exactly the same number of classes of students she taught!

Looking at the prices and paying close attention to the number of students in each class, Alice noted that she could save some money by assigning the types of candy to certain classes. Because she’s a teacher, her income is not that big and saving money is very important to her, so she asked you to write a program to determine the least amount of money she must spend.


Each test case consists of three lines. The first line contains a positive integer N (1≤N≤100000). The second line contains N integers Ci, the ith integer indicates the number of students in Alice’s i-th class. The third and last line also contains N integers Pi the ith integer indicates the price of the ith type of candy (1 ≤ Ci, Pi  ≤ 100000).

The input ends with a line consisting of a 0, which indicates end of input.


For each test case, output a line containing the least amount of money Alice must spend.


1 1 1 1
2 2 2 2
10 80 37 22 109
6 8 8 20 15
0 Output: 8

Added by:Paulo Costa
Time limit:0.301s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel Pentium G860 3GHz)
Resource:ITA - Brazilian ICPC Training Camp, Jan-Feb/2012

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xyz: 2015-07-09 13:02:37

use unsigned long long int...

SangKuan: 2015-07-04 02:21:38

greedy algorithm.and use quicksort or mergesort,do not use Selection sort or insert sort,it is O(n^2).and can use auto sorted struct,like priority_queue

Last edit: 2015-07-04 03:50:06
Bhuvnesh Jain: 2015-06-25 22:01:40

similar to problem FASHION

sujit yadav: 2015-06-23 16:07:35

greedy !! :)

hrishabh: 2015-06-18 18:53:26

Simply use sort inbuild fx...
AC in first go..:)

Last edit: 2015-06-18 18:54:23
venkatesh: 2015-06-17 07:27:04

In Python TLE, but in C++ AC : same logic

Dushyant Singh: 2015-06-08 08:23:06

Selection sort gives TLE! :-(

[Mayank Pratap]: 2015-06-07 19:32:10

I like candy distribution very much.....Those complaining about wrong problem description
.....Problem description is correct.... two ints when performed by a basic arithmetic operation.....intermediate result may overflow....correct me if I am wrong....Learnt from previous problems... :)

PRIBAN91: 2015-05-28 12:00:32

Each TLE makes me learn something new... Use StringTokenizer in java for better performance.

Indian Cyber Army (IndiShell): 2015-02-07 12:46:08

My code with insertion sort is giving TLE :(