呃是MLE
by FZzzz @ 2019-02-23 17:37:29
所以MTL是什么？
by zhanghengrui @ 2019-02-23 17:37:32
MTL好评
by 豌豆射手皮0608 @ 2019-02-23 17:38:25
@[zhanghengrui](/space/show?uid=110634) 百度了一下是矩阵模板库QwQ
by t162 @ 2019-02-23 17:38:44
@[stable_sort](/space/show?uid=174045)
帮你改了一下
```cpp
#include<iostream>
#include<cstring>
#include<cstdio>
#define a x
#define b y
#define c z
//#define LOCAL
using namespace std;
long long w[25][25][25];
long long f(long long x,long long y,long long z){
if(x<=0||y<=0||z<=0) return 1;
if(x>20||y>20||z>20) return f(20,20,20);
if(w[x][y][z]>0) return w[x][y][z];
if(a<b&&b<c) w[x][y][z]=f(a,b,c-1)+f(a,b-1,c-1)-f(a,b-1,c);
else w[x][y][z]=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 w[x][y][z];
}
int main()
{
memset(w,-1,sizeof(w));
int a,b,c;
while(cin>>a>>b>>c){
if(a==-1&&b==-1&&c==-1) break;
cout<<"w("<<a<<", "<<b<<", "<<c<<") = "<<f(a,b,c)<<endl;
}
return 0;
}
```
by Smile_Cindy @ 2019-02-23 18:10:56
@[Alpha](/space/show?uid=87058) 过了谢谢大佬，但是这是什么原理呢？
by FZzzz @ 2019-02-23 20:46:06
@[stable_sort](/space/show?uid=174045)
你的a,b,c和x,y,z混淆了，我只不过是把他们重新统一一下而已。
by Smile_Cindy @ 2019-02-23 20:48:37
@[Alpha](/space/show?uid=87058) 哦哦哦是这一段吧
```
if(a<b&&b<c) w[x][y][z]=f(a,b,c-1)+f(a,b-1,c-1)-f(a,b-1,c);
else w[x][y][z]=f(a-1,b,c)+f(a-1,b-1,c)+f(a-1,b,c-1)-f(a-1,b-1,c-1);
```
by FZzzz @ 2019-02-23 20:53:12
@[Alpha](/space/show?uid=87058) 谢谢大佬
by FZzzz @ 2019-02-23 20:53:33