hdu 2015 java 偶数求和

用到等差数列求和公式Sn=na1+n(n-1)d/2

package second;

import java.util.Scanner;

public class j2015 {
	public static void main(String args[]){
		Scanner scanner = new Scanner(System.in);
		while(scanner.hasNext()){
			int n = scanner.nextInt();
			int m = scanner.nextInt();
			if(n%m==0){
			for(int i=1;i<=n;i+=m){
				int ans = (i*2*m+m*(m-1))/m;
				if(i<n+1-m)
				System.out.print(ans+" ");
				else
					System.out.println(ans);
			}
			}
			else if (n%m!=0) {
				for(int i=1;i<=n-n%m;i+=m){
					int ans = (i*2*m+m*(m-1))/m;
					System.out.print(ans+" ");
				}
				System.out.println(((n-n%m+1)*2*(n%m)+(n%m)*(n%m-1))/(n%m));
			}
		}
	}
}