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hdu 1001 sum problem
Sum Problem
Time Limit: 1000/500 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 302207 Accepted Submission(s): 75492
Problem Description
Hey, welcome to HDOJ(Hangzhou Dianzi University Online Judge).
In this problem, your task is to calculate SUM(n) = 1 + 2 + 3 + ... + n.
In this problem, your task is to calculate SUM(n) = 1 + 2 + 3 + ... + n.
Input
The input will consist of a series of integers n, one integer per line.
Output
For each case, output SUM(n) in one line, followed by a blank line. You may assume the result will be in the range of 32-bit signed integer.
Sample Input
1 100
Sample Output
1 5050
Author
DOOM III
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#include<stdio.h>
int main()
{
int n,i;
double sum;
while(scanf("%ld",&n)!=EOF)
{ sum=0;
for(i=1;i<=n;i++)
sum+=i;
printf("%.0lf\n\n",sum);
}
return 0;
}hdu 1001 sum problem
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