代码君来啦||ヽ(*￣▽￣*)ノミ|Ю```cpp
#include<bits/stdc++.h>
using namespace std;
int s[30][30][30];
long long f(long long a,long long b,long long c)
{
if(a<=0 || b<=0 || c<=0)
return 1;
else
if(a>20 || b>20 || c>20)
return f(20,20,20);
else
if(s[a][b][c]!=0)
return s[a][b][c];
else
if(a<b && b<c)
{
s[a][b][c]=f(a,b,c-1)+f(a,b-1,c-1)-f(a,b-1,c);
return s[a][b][c];
}
else
{
s[a][b][c]=f(a-1,b,c)+f(a-1,b-1,c)+f(a-1,b,c-1)-f(a-1,b-1,c-1);
return s[a][b][c];
}
}
int main()
{
long long a,b,c;
cin>>a>>b>>c;
while(!(a==-1 && b==-1 && c==-1))
{
cout<<"w("<<a<<", "<<b<<", "<<c<<") = "<<f(a,b,c)<<endl;
cin>>a>>b>>c;
}
return 0;
}
```
by max11 @ 2023-07-15 09:57:51
```cpp
#include<bits/stdc++.h>
using namespace std;
int s[30][30][30];
long long f(long long a,long long b,long long c)
{
if(a<=0 || b<=0 || c<=0)
return 1;
else
if(a>20 || b>20 || c>20)
return f(20,20,20);
else
if(s[a][b][c]!=0)
return s[a][b][c];
else
if(a<b && b<c)
{
s[a][b][c]=f(a,b,c-1)+f(a,b-1,c-1)-f(a,b-1,c);
return s[a][b][c];
}
else
{
s[a][b][c]=f(a-1,b,c)+f(a-1,b-1,c)+f(a-1,b,c-1)-f(a-1,b-1,c-1);
return s[a][b][c];
}
}
int main()
{
long long a,b,c;
cin>>a>>b>>c;
while(!(a==-1 && b==-1 && c==-1))
{
cout<<"w("<<a<<", "<<b<<", "<<c<<") = "<<f(a,b,c)<<endl;
cin>>a>>b>>c;
}
return 0;
}
```
by max11 @ 2023-07-15 09:58:40