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Why,WA?#include <stdio.h> #define max 22 int data[max][max][max]; void main() { int i,j,k; for(i=0;i<21;i++) for(j=0;j<21;j++) { data[0][i][j]=1; data[i][0][j]=1; data[i][j][0]=1; } for(i=1;i<=20;i++) for(j=1;j<=20;j++) for(k=1;k<=20;k++) { if((i<j)&&(j<k)) data[i][j][k]=data[i][j][k-1] + data[i][j-1][k-1] - data[i][j-1][k]; else data[i][j][k]=data[i-1][j][k] + data[i-1][j-1][k] + data[i-1][j][k-1] -data[i-1][j-1][k-1]; } int a,b,c; while(1) { scanf("%d %d %d",&a,&b,&c); if((a==-1)&&(b==-1)&&(c==-1)) break; printf("w(%d, %d, %d) = ",a,b,c); if(a>20||b>20||c>20) printf("%d\n",data[20][20][20]); else if(a<=0||b<=0||c<=0) printf("1\n"); else printf("%d\n",data[a][b][c]); } } Followed by:
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