```cpp
#include<bits/stdc++.h>
using namespace std;
long long s[25][25][25];
long long w(long long a,long long b,long long c){
if(a<1||b<1||c<1) return 1;
else if(a>20||b>20||c>20) a=20,b=20,c=20;
if(s[a][b][c])return s[a][b][c];
else if(a<b&&b<c) s[a][b][c]=w(a,b,c-1)+w(a,b-1,c-1)-w(a,b-1,c);
else s[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 s[a][b][c];
}
int main(){
long long a,b,c;
while(1){
cin>>a>>b>>c;
if(a==-1&&b==-1&&c==-1) return 0;
printf("w(%lld, %lld, %lld) = %lld\n",a,b,c,w(a,b,c));
}
}
```
第五行和第六行顺序反了，还有long long开到底
by GrainRain25 @ 2024-08-13 20:50:39
感谢巨佬，已关
by hiebb @ 2024-08-13 21:03:18
~~但不开long long好像也能过~~
by hiebb @ 2024-08-13 21:05:32
不开long long的后果：
by johnhby @ 2024-08-14 14:30:36
Subtask #0
0ms/0B
RE #3 0ms/0B
RE #4 0ms/0B
RE #5 0ms/0B
RE #6 0ms/0B
RE #7
Subtask #1 3ms/560.00KB
WA #1 33ms/680.00KB
WA #2
by johnhby @ 2024-08-14 14:32:09