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RGB7204 - Эхний n тооны нийлбэр

Эхний n тооны нийлбэрийг тодорхой давталт ашиглан ол.

Input

Int төрлийн эерэг бүхэл тоо өгөгдөнө.

Output

1-ээс n тооны нийлбэр.

Example

Input:
5

Output:
15

Нэмсэн:Bataa
Огноо:2011-06-12
Хугацааны хязгаарлалт:1s
Эх кодын хэмжээний хязгаарлалт:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Програмчлалын хэлүүд:ADA95 ASM32 BASH BF C NCSHARP CSHARP C++ 4.3.2 CPP C99 CLPS LISP sbcl LISP clisp D ERL FORTRAN HASK ICON ICK JAVA JS-RHINO JULIA LUA NEM NICE OCAML PAS-GPC PAS-FPC PERL PHP PIKE PRLG-swi PYTHON PYPY3 PYTHON3 RUBY SCALA SCM guile ST TCL WHITESPACE

hide comments
2022-10-06 08:37:39
zaaj uguh nzenu
2022-10-06 08:37:18
hetsuuuenaaa
2022-10-06 08:36:51
amidrch ymsn
2022-10-04 12:19:15
bi tom boovtoi
2022-09-29 03:01:30
https://play.typeracer.com?rt=10e6fptde0
2022-09-28 04:34:12
what are you doing stepbro lipbite
2022-08-15 05:16:30
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2022-06-22 12:34:44
What are you doin bro?
-Anand
2022-05-06 06:12:42
a=int(input())
s=0
for x in range (1,a+1,1):
s=s+x
print(s)
2022-05-02 08:23:11
a=int(input())
s=0
for x in range (1,a+1,1):
s=s+x
print(s)
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