View Code of Problem 30

#include<stdio.h>
int main()
{
	int n,i;
	int sum = 0;
	while( scanf("%d",&n) != EOF)
	{
		for(i=1;i<=n;i++)
        {
        	sum += i;
	    }
	    printf("%d\n",sum);	
	    sum = 0;
	}
	return 0;
}

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