至少你的数组得开[21][21][21]啊
by Oliver2004 @ 2017-07-05 18:55:42
为什么要用三维呢？？？？？？？？？？
by wangshuheng3541 @ 2017-07-18 21:23:17
```cpp
#include<cstdio>
#define ll long long
using namespace std;
ll w[21][21][21];
int main(){
for(int i=0;i<=20;++i)
for(int j=0;j<=20;++j) w[i][j][0]=w[i][0][j]=w[0][i][j]=1;
for(int i=1;i<=20;++i)
for(int j=1;j<=20;++j)
for(int 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];
ll a,b,c;
while(scanf("%lld%lld%lld",&a,&b,&c)==3){
if(a==-1&&b==-1&&c==-1) break;
if(a<=0||b<=0||c<=0) printf("w(%lld, %lld, %lld) = 1\n",a,b,c);
else if(a>20||b>20||c>20) printf("w(%lld, %lld, %lld) = %lld\n",a,b,c,w[20][20][20]);
else printf("w(%lld, %lld, %lld) = %lld\n",a,b,c,w[a][b][c]);
}
return 0;
}
```
by CALXWMC @ 2017-08-03 13:16:52