hdu1000 hdu1001

2017-11-12

hdu1000 A + B Problem
hdu1001 Sum Problem

hdu 1000 A + B Problem

Problem Description

Calculate A + B.

Input

Each line will contain two integers A and B. Process to end of file.

Output

For each case, output A + B in one line.

Sample Input

1 1

Sample Output

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

hdu 1001 Sum Problem

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.

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

5050

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