http://poj.org/problem?id=3406 //* @author: 82638882@163.com import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner in=new Scanner(System.in); int[] b2=new int[]{6,2,4,8}; int[] b3=new int[]{1,3,9,7}; int[] b7=new int[]{1,7,9,3}; int[] b9=new int[]{1,9,1,9}; int n=in.nextInt(); int m=in.nextInt(); int w=n-m; int e,a2=0,a3=0,a5=0,a7=0,a9=0; e=n;while((e=e/2)!=0) a2+=e; e=m;while((e=e/2)!=0) a2-=e; e=w;while((e=e/2)!=0) a2-=e; e=n;while((e=e/5)!=0) a5+=e; e=m;while((e=e/5)!=0) a5-=e; e=w;while((e=e/5)!=0) a5-=e; a3=f(n,3)-f(m,3)-f(w,3); a7=f(n,7)-f(m,7)-f(w,7); a9=f(n,9)-f(m,9)-f(w,9); int ans=1; if(a5>a2) System.out.println(5); else{ a2-=a5; if(a2!=0){ a2=a2%4; ans*=b2[a2]; ans=ans%10; } ans*=b3[(a3%4+4)%4]; ans=ans%10; ans*=b7[(a7%4+4)%4]; ans=ans%10; ans*=b9[(a9%4+4)%4]; ans=ans%10; System.out.println(ans); } } public static int f(int n,int a) { if(n==0) return 0; else return f(n/2,a)+g(n,a); } public static int g(int n,int a) { if(n==0)return 0; else if(n%10< a)return n/10+g(n/5,a); else return n/10+1+g(n/5,a); } }
Meta
-
Recent Posts
Recent Comments
- MorrissMar on 隆宪叁年-五一
- MorrissMar on 隆宪叁年-五一
- bngvlttwnj on 隆宪叁年-五一
- bngvlttwnj on 隆宪叁年-五一
- MorrissMar on 隆宪叁年-五一
Archives
- May 2024
- April 2023
- February 2023
- January 2023
- December 2022
- November 2022
- September 2022
- June 2022
- July 2021
- January 2021
- February 2020
- September 2019
- March 2018
- February 2018
- August 2016
- July 2016
- June 2016
- May 2016
- April 2016
- March 2016
- February 2016
- January 2016
- December 2015
- November 2015
- October 2015
- September 2015
- August 2015
- July 2015
- June 2015
- May 2015
- April 2015
- March 2015
- February 2015
- January 2015
- December 2014
- November 2014
- October 2014
- September 2014
- August 2014
- July 2014
- June 2014
- May 2014
- April 2014
- March 2014
- February 2014
- January 2014
- December 2013
- November 2013
- October 2013
- September 2013
- August 2013
- July 2013
- June 2013
- May 2013
- April 2013
- March 2013
- February 2013
- January 2013
- December 2012
- November 2012
- October 2012
- September 2012
- August 2012
- July 2012
- June 2012
- May 2012
- April 2012
- March 2012
- February 2012
- January 2012
- December 2011
- November 2011
- October 2011
- September 2011
- August 2011
- July 2011
- June 2011
- May 2011
- April 2011
- March 2011
- February 2011
- January 2011
- December 2010
- November 2010
- October 2010
- September 2010
- August 2010
- July 2010
- June 2010
- May 2010
- April 2010
- March 2010
- February 2010
- January 2010
- December 2009
- November 2009
- October 2009
- September 2009
- August 2009
- July 2009
- June 2009
- May 2009
- April 2009
- March 2009
- February 2009
Categories