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w[i][j][k] = w[i][j][j-1] + w[i][j-1][k-1] - w[i][j-1][k];In Reply To:why WA? Posted by:PC0400322032 at 2004-06-26 17:41:37 > #include <stdio.h> > void main(void) > { > int w[21][21][21]; > int a,b,c; > int i,j,k; > for(i=0;i<21;i++) > for(j=0;j<21;j++) > w[0][i][j] = w[i][0][j] = w[i][j][0] = 1; > for(i=1;i<21;i++) > for(j=1;j<21;j++) > for(k=1;k<21;k++) > { > if((i<j)&&(j<k)) > w[i][j][k] = w[i][j][j-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]; > } > while(1) > { > scanf("%d %d %d",&a,&b,&c); > i =a;j=b;k=c; > if(a==-1 && b==-1 && c==-1) > break; > if(a<=0 || b<=0 || c<=0) > i=j=k=0; > if(a>20 || b>20 || c>20) > i=j=k=20; > printf("w(%d, %d, %d) = %d\n",a,b,c,w[i][j][k]); > } > } > Followed by:
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