@[chensizhe](/user/874900)
题目中有四种情况，仔细看题
by Chenyufeng040525 @ 2023-05-27 01:30:48
@[Chenyufeng040525](/user/929850) 感谢感谢，最后发现输出还要换行。。。给我整吐了
by chensizhe @ 2023-05-27 11:21:52
现在这个代码没问题了：
```
#include<bits/stdc++.h>
using namespace std;
long long f[25][25][25];
long long w(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 w(20,20,20);
}
else if(f[a][b][c]!=0){
return f[a][b][c];
}
else if(a<b&&b<c){
f[a][b][c]=w(a,b,c-1)+w(a,b-1,c-1)-w(a,b-1,c);
return f[a][b][c];
}
else{
f[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 f[a][b][c];
}
}
int main(){
long long a,b,c;
while(1){
cin>>a>>b>>c;
if((a==-1)&&(b==-1)&&(c==-1)){
break;
}
cout<<"w("<<a<<", "<<b<<", "<<c<<") = "<<w(a,b,c)<<endl;
}
return 0;
}
```
by chensizhe @ 2023-05-27 11:22:43