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RGB7070 - Нийлбэр 1

Өгөгдсөн натурал тоо n хүртэлх натурал тоонуудын нийлбэрийг ол.

Давталт ашиглахгүй болно.

Input

Натурал тоо n өгөгдөнө.

Output

Нийлбэр

Example

Input:
10

Output:
55

Нэмсэн:Bataa
Огноо:2013-01-06
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
2022-07-04 10:11:26
Өгөгдсөн натурал тоо n хүртэлх натурал тоонуудын нийлбэрийг ол.

Давталт ашиглахгүй болно.

Input
Натурал тоо n өгөгдөнө.
2022-06-23 13:45:07


























































ydg suga ve sgudaaa






















































































































































































































































































































































































































































































































































































































































































2022-06-23 13:44:00
yee jawhaa 5;0


2022-06-23 13:42:35
jawhaa suga suga suga :)
2022-05-30 03:02:09
psdsa psda psda psda psasda pssda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda psda
2022-05-10 03:16:49
tsogoo suga mine
2022-05-02 16:20:20
yu ni buruu bn
2022-05-02 16:20:00
#include<stdio.h>
#include<stdlib.h>
#include<math.h>

int main(){
printf("Tanii hariu:::");
int a,b,c,d,e;
scanf("%d",&a);
b=a*(a+1)/2;
printf("%d",b);


return 0;
}
2022-04-18 15:13:50
chinii daragin bodlogo bizde
2022-04-18 15:13:37
uerhey enhjeeeeen <3
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