求1到n和
| Time Limit: | 1000MS | Memory Limit: | 65536KB |
|---|---|---|---|
| Total Submissions: | 669 | Accepted: | 484 |
Description:
给定一个n值，求sum(n)=1+2+3+……+n-1+n.
Input:
输入一个正整数n.
Output:
输出1到n的和。
Sample Input:
100
Sample Output:
5050
Source:
#include <stdio.h>
int main()
{
int N,i,sum=0;
scanf("%d",&N);
for (i=1;i<N+1;i++)
sum+=i;
printf("%d\n",sum);
return 0;
}
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