L1-008 求整数段和

#include <iostream>

#include <algorithm>

#include <cmath>

#include <map>

#include <cstdio>

using namespace std;

#define maxn 3000

int main()

{

int a,b,i=0,sum=0;

cin>>a>>b;

while(a+i <= b)

{

sum += (a+i);

if((i+1)%5==1&&i!=0)cout<<endl;

printf("%5d",a+i);

i++;

}

cout<<endl<<"Sum = "<<sum;

}