第一，可以把and改成&&，or改成||；
第二，第七行“<”改为“<=”
by 狂犇 @ 2019-01-03 20:50:22
那就`cout<<w(a,b,c)/2;`
~~话说我就常常这么干~~
by qwertylzx·破祥 @ 2019-01-03 21:03:13
把 < 变成 <=试试看
by 逸少 @ 2019-01-03 21:34:30
@[狂犇](/space/show?uid=125325)
@[20180235陈逸凡](/space/show?uid=128775)
5个全部re了
```cpp
#include <iostream>
#include<vector>
#include<string>
using namespace std;
int k[30][30][30] ;
int w(long long a, long long b, long long c) {
if (a <= 0 || b <= 0 || c <= 0) return 1;
if (k[a][b][c]) return k[a][b][c];
else if (a > 20 || b > 20 || c > 20) return w(20, 20, 20);
else {
if (a < b && b < c) k[a][b][c] = w(a, b, c - 1) + w(a, b - 1, c - 1) - w(a, b - 1, c);
else k[a][b][c] = w(a - 1, b, c) + w(a - 1, b - 1, c) + w(a - 1, b, c - 1) - w(a - 1, b - 1, c - 1);
}
return k[a][b][c];
}
int main()
{
long long a, b, c;
while (1) {
cin >> a >> b >> c;
if (a == -1 && b == -1 && c == -1) break;
else cout << "w("<<a<<", "<<b<<", "<<c<<") = "<<w(a,b,c)<< endl;
}
return 0;
}
```
by fz风 @ 2019-01-04 11:10:55
~~数组开大点！~~
~~尴尬~~
by 逸少 @ 2019-01-04 19:53:10
@[20180235陈逸凡](/space/show?uid=128775)
哇塞 ，开到k[99][99][99],前面两个ac了。
k【200】【200】【200】就全部ac了，
这是为什么？我看题解他们全部是25或者30了就成功了啊
by fz风 @ 2019-01-04 20:25:28