hdu 1134 Game of Connections

主要考察卡特兰数,大数乘法,除法……

链接http://acm.hdu.edu.cn/showproblem.php?pid=1134

#include<iostream>
#include<stdio.h>
#include<algorithm>
#include<cmath>
#include<iomanip>
using namespace std;
int
an[102][102];
void
mul(int i)
{

    int
k,j,t=0,a=4*i-2,b=i+1,temp;
    k=100;
    while
(an[i-1][k]<=0||an[i-1][k]>9) k--;
    for
(j=0;j<=k;j++)
    {

        an[i][j]=an[i-1][j]*a+t;
        if
(an[i][j]>9)
        {

            t=an[i][j]/10;
            an[i][j]%=10;
        }

        else
t=0;
    }

    while
(t!=0)
    {

        an[i][j++]=t%10;
        t/=10;
    }

    j--;
    t=0;
    while
(j>=0)
    {

        temp=t*10+an[i][j];
        an[i][j]=temp/b;
        t=temp%b;
        j--;
    }
}

int
main()
{

    int
i,n;
    an[0][0]=1;an[1][0]=1;
    for
(i=2;i<=100;i++)
        mul(i);
    while
(cin>>n&&n!=-1)
    {

        i=100;
        while
(an[n][i]<=0||an[n][i]>9) i--;
        for
(;i>=0;i--)
            cout<<an[n][i];
        cout<<endl;
    }

    return
0;
}

posted @ 2013-07-12 19:32  _随心所欲_  阅读(182)  评论(0编辑  收藏  举报