@[fanboyang](/user/1286089)
```c
#include<bits/stdc++.h>
using namespace std;
int fby( int m,int n)
{
if(m==0)
{
return n+1;
}
if(m>0 && n==0)
{
return fby(m-1,1);
}
if(n>0 )
{
return fby(m-1,fby(m,n-1));//要加return
}
}
int main(){
int n,m;
cin>>m>>n;
cout<<fby(m,n);
return 0;
}
```
by LHM_zs @ 2024-08-21 09:41:02
@[LHM_zs](/user/1024294)
very thank you
by fanboyang @ 2024-08-21 10:36:05
@[fanboyang](/user/1286089) **求互关**
```cpp
#include<bits/stdc++.h>
using namespace std;
int m,n;
int akm(int m,int n){
if(m==0)return n+1;
if(n==0)return akm(m-1,1);
return akm(m-1,akm(m,n-1));
}
int main(){
cin>>m>>n;
cout<<akm(m,n)<<endl;
return 0;
}
```
by chenzhishuo2012 @ 2024-09-11 08:39:27
@[fanboyang](/user/1286089)
```cpp
#include<bits/stdc++.h>
using namespace std;
int fby( int m,int n)
{
if(m==0)
{
return n+1;
}
if(m>0 && n==0)
{
return fby(m-1,1);
}
if(n>0 )
{
return fby(m-1,fby(m,n-1));
}
}
int main(){
int n,m;
cin>>m>>n;
cout<<fby(m,n);
return 0;
}
```
$\color{red}问题是啥呢，这个if(n>0)$
$\color{red}需要return，不然如果一直为第3种情况的话就卡了(死循环)$
$\color{red}所以会RE$
# $\color{red}求关$
by 文锡 @ 2024-09-12 12:50:54
@[fanboyang](/user/1286089)
```cpp
#include<bits/stdc++.h>
using namespace std;
int Ackermann(int m,int n)
{
if(m == 0)
{
return n + 1;
}
else
if(m > 0 && n == 0)
{
return Ackermann(m - 1 , 1);
}
if(m > 0 && n > 0)
{
return Ackermann(m - 1, Ackermann(m , n - 1));
}
}
int main()
{
int m , n;
cin >> m >> n;
cout << Ackermann(m , n) << endl;
return 0;
}
by Jason101 @ 2024-09-17 18:43:28
求关QWQ(用的记忆化)
```
#include<cstdio>
int f[1010][1010],n,m;
int akm(int m,int n){
if(!m)return f[m][n]=n+1;
else if(f[m][n])return f[m][n];
else if(m&&!n)return f[m][n]=akm(m-1,1);
else return f[m][n]=akm(m-1,akm(m,n-1));
}
int main(){
scanf("%d%d",&m,&n);akm(m,n);
printf("%d",f[m][n]);return 0;
}
```
by jebfghbbcdsl @ 2024-09-27 21:15:42
@[fanboyang](/user/1286089)
by jebfghbbcdsl @ 2024-09-27 21:39:52
hhhhhhhh
by _liujunming_ @ 2024-10-01 15:48:25