Practice
Resources
Contests
Online IDE
New
Free Mock
Events New Scaler
Practice
Improve your coding skills with our resources
Contests
Compete in popular contests with top coders
Events
Attend free live masterclass hosted by top tech professionals
New
Scaler
Explore Offerings by SCALER

Collections Module II

Problem Description

Let's solve another interesting problem using collections module.

There are N customers who bought items, the list is represent as item id and price.

Your task is to print each item id and total price(quantity * price) in order of its first occurrence.

Problem Constraints

1 <= N <= 105

1 <= item id, price <= 109

Input Format

First line consist of integer N.

Each of the next N lines consist of two space separated integers item id and price of item.

Output Format

Print each item id and total price(quantity * price) in order of its first occurrence.

Note: There should be exactly one space after each integers you printed.

Example Input

Input 1:

```9
10 10
2 5
10 10
2 5
1 2
1 2
10 10
4 5
2 5```

Input 2:

```4
1 2
1 2
2 2
1 2```

Example Output

Output 1:

```10 30
2 15
1 4
4 5 ```

Output 2:

```1 6
2 2 ```

Example Explanation

Explanation 1:

```Item with id 10 comes first, followed by 2, 1, 4.
So, print the item in order of its first occurence.```

Explanation 2:

`Item with id 1 comes first, followed by 2.`

Hints
• Hint 1
• Solution Approach
• Complete Solution

Discussion

Free Mock Assessment
Fill up the details for personalised experience.
Phone Number *
OTP will be sent to this number for verification
+1 *
+1
Change Number
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
*Enter the expected year of graduation if you're student
Current Employer
Company Name
College/University Name
Job Title
Job Title
Software Development Engineer (Backend)
Software Development Engineer (Frontend)
Software Development Engineer (Full Stack)
Data Scientist
Android Engineer
iOS Engineer
Devops Engineer
Support Engineer
Research Engineer
Engineering Intern
QA Engineer
Co-founder
SDET
Product Manager
Product Designer
Backend Architect
Program Manager
Release Engineer