poj 1283 Moving Computer

这个题与poj1664一样的类型的题目,但是这题的数据量比较大,如果像1664那样做,就会超时,因为有很多重复的计算;

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#include<iostream>
#include<cstdio>
#include<cstdlib>
#include<algorithm>
#include<cmath>
#include<queue>
#include<set>
#include<map>
#include<cstring>
#include<vector>
#include<string>
#define LL long long
using namespace std;
LL dp[224][224];
void Init( )
{
    for( int i = 0 ; i <= 200; i ++ )
    {
         dp[1][i] = 1;dp[i][0] = 1;
         dp[i][1] = 1;
    }
    for( int i = 2 ;i <= 200 ; i++ )
    {
        for( int j = 1; j <=200 ; j ++ )
        {
           if( j >= i ) dp[i][j] = dp[i-1][j] + dp[i][j-i];
           else dp[i][j] = dp[j][j];
        }    
    }
}
int main(  )
{
    int n, m;
    Init();
    while( scanf( "%d %d",&m,&n ),n|m )
    {
        printf( "%I64d\n",dp[n][m-n] );    
    }
    //system( "pause" );
    return 0;
}

 

posted @ 2012-08-15 21:48  wutaoKeen  阅读(165)  评论(0编辑  收藏  举报