Problem C
Fimmtudagstilboð
                                                                Languages
                        
                            
                                                                    en
                                                                    is
                                                            
                        
                                                                
   
      
    Hafliði has been a regular at Mahjong Pizza’s Thursday-offer since its debut in 1993. The offer consists of a single pizza with two toppings for $1\, 000$ ISK, that is until January 2021 when it increased by $100$ ISK and has done so every year since. Hafliði wants you to write a program that tells him how much the offer costs in the year $y$ given this pattern.
Input
First and only line contains a single integer $y$.
Output
Write a single line containing the price of a Thursday-offer in the year $y$.
Scoring
| Group | Points | Constraints | 
| 1 | 20 | $y = 2\, 020$ | 
| 2 | 20 | $2\, 020 \leq y \leq 2\, 024$ | 
| 3 | 30 | $2\, 020 \leq y \leq 9\, 999$ | 
| 4 | 30 | $1\, 993 \leq y \leq 9\, 999$ | 
| Sample Input 1 | Sample Output 1 | 
|---|---|
| 2020 | 1000 | 
| Sample Input 2 | Sample Output 2 | 
|---|---|
| 2024 | 1400 | 
