CF1037D Valid BFS?

Posted 2022-05-06 liuzhaojun

https://www.luogu.org/problemnew/show/CF1037D

#include<iostream>
#include<cstring>
#include<queue>
using namespace std;
const int maxn=100;
struct node
    int n=0;
    int cnt=0;
    int a[maxn];
;
struct node arr[maxn];
string s1,s2;
void bfs(int s)

    queue<node> q;
    q.push(arr[s]);
    while(!q.empty())
    
        node p=q.front();
        q.pop();
        s1=s1+char(‘0‘+p.n);
        if(p.cnt!=0)
        for(int i=0;i<p.cnt;i++)
        
                q.push(arr[p.a[i]]);
        
    

int main()

    int m,x,y,temp,k;
    cin>>m;
    k=m;
    m--;
    while(m--)
    
    cin>>x>>y;
    arr[x].n=x;
    arr[x].a[arr[x].cnt]=y;
    arr[x].cnt++;
    arr[y].n=y;
    
    for(int i=0;i<k;i++)
    
        cin>>temp;
        s2=s2+char(‘0‘+temp);
    
    bfs(1);
    if(s1==s2)
    cout<<"Yes"<<endl;
    else
    cout<<"No"<<endl;
    return 0;
  

以为是道简单题，其实emmmm

先挖个坑