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wa

Posted by Headacher at 2008-09-15 23:28:06 on Problem 1579
//pku1579
#include<iostream>
using namespace std;
int w[25][25][25];
void set()
{    
     int i,j,k;
     for(i=0;i<=20;i++)
     for(j=0;j<=20;j++)
     w[i][j][0]=w[i][0][j]=w[0][i][j]=1;
     for(i=1;i<=20;i++)
        for(j=1;j<=20;j++)
           for(k=1;k<=20;k++)
           {   
               if(i<j&&j<k)
               w[i][j][k]=w[i][j][k-1]+ w[i][j-1][k-1]-w[i][j-1][k];
               else
               w[i][j][k]=w[i-1][j][k]+ w[i-1][j-1][k]+w[i-1][j][k-1]-w[i-1][j-1][k-1];
           }
}
int main()
{    int a,b,c;
     set();
     while(scanf("%d %d %d",&a,&b,&c)!=EOF)
     {        if(a==-1&&b==-1&&c==-1)
              break;
              printf("w(%d %d %d) = ",a,b,c);
              if(a<=0||b<=0||c<=0)
              {  printf("%d\n",w[0][0][0]);
                 
              }
               else if(a>20||b>20||c>20)
              {  printf("%d\n",w[20][20][20]); }
              else printf("%d\n",w[a][b][c]);
     }
     system("pause");
     return 0;
}
    

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