electicode
Bosh sahifaKurslarResurslarMasalalarMilliy olimpiadaMusobaqalarReyting
...

Arithmetic sum

Vaqt limiti: 1000msXotira limiti: 256MB
Barcha yechimlar

Masala tavsifi

Write a program that sums all integers from 1 to N.

SubtaskPointsAdditional Constraints
1401≤n≤1031 \leq n \leq 10^31≤n≤103
2601≤n≤1091 \leq n \leq 10^91≤n≤109

Input Format

The program is given one integer n(1≤n≤109)n (1 \leq n \leq 10^9)n(1≤n≤109).

Output Format

Output one integer - the sum of all numbers from 1 to nnn.

Misollar

Misol 1
Kirish
5
Chiqish
15

© 2026 Electicode. All rights reserved.