玄关

yiwugougou @ 2024-08-13 19:53:12

#include<bits/stdc++.h>
using namespace std;
int w(int a,int b,int 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(a<b && b<c){
        return w(a,b,c-1) + w(a,b-1,c-1) - w(a,b-1,c);
    }else{
        return w(a−1,b,c) + w(a−1,b−1,c) + w(a−1,b,c−1) − w(a−1,b−1,c−1);
    }
}
int main(){
    int x,y,z;
    while(cin>>x>>y>>z && (x!=-1 || y!=-1 || z!=-1)){
        cout<<"w("<<x<<", "<<y<<", "<<z<<") = "<<w(x,y,z)<<endl;
    }
    return 0;
}

by goIdie @ 2024-08-13 19:56:38

@xiaohezi ,

#include<bits/stdc++.h>
#define int long long
using namespace std;
long long x,y,z,ans[155][155][155];
int w(int a,int b,int c)
{
    if(a<=0||b<=0||c<=0)return 1;
    if(a>20||b>20||c>20)return w(20,20,20);
    if(ans[a][b][c])return ans[a][b][c];
    if(a<b&&b<c)ans[a][b][c]=w(a,b,c-1)+w(a,b-1,c-1)-w(a,b-1,c);
    else ans[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 ans[a][b][c];
}
signed main()
{   
    while(cin>>x>>y>>z)
    {
        if(x==-1&&y==-1&&z==-1)break;
        cout<<"w("<<x<<", "<<y<<", "<<z<<") = "<<w(x,y,z)<<endl;
    }
    return 0;
}

by cj180202 @ 2024-08-13 19:57:50

@xiaohezi

会重复调用，浪费时间，记忆化答案。

by yiwugougou @ 2024-08-21 21:26:07

@cj180202

懂了，（最近有点忙，没来得及看）

by yiwugougou @ 2024-08-21 21:26:54

@goIdie 已关

@cj180202 已关

by yiwugougou @ 2024-08-21 21:35:42

@goIdie 按你的代码打了一遍，结果这样了

by goIdie @ 2024-08-21 21:37:18

@xiaohezi ,你那打的是减号吗。。。

by yiwugougou @ 2024-08-21 21:54:30

服了，图省事复制题目上的代码，结果他更我忘大家来找茬

by yiwugougou @ 2024-08-21 21:54:53

打错字了