2 solutions

  • 0
    @ 2022-12-3 17:49:31

    map

    #include <bits/stdc++.h>
    using namespace std;
    #define accelerate ios::sync_with_stdio(false),cin.tie(0);
    #define int long long
    #define PII pair<int,int>
    #define INF 0x3f3f3f3f
    #define ufor(i,st,en) for(int i=st;i<=en;i++)
    #define dfor(i,en,st) for(int i=en;i>=st;i--)
    const int N=2e5+10;
    unordered_map<int,int>ff;
    struct node{
    	int x,y;
    	bool operator <(const node &xx){
    		return y<xx.y;
    	}
    }a[N];
    
    signed main(){
    	int n,m,x;
    	accelerate;
    	cin>>n>>m;
    	for(int i=1;i<=n;i++){
    		cin>>a[i].x;
    		a[i].y=i;
    		ff[a[i].x]=i;
    	}
    	vector<node>v;
    	for(int j=1;j<=m;j++){
    		cin>>x;
    		if(ff[x]) v.push_back(node{a[ff[x]]});
    	}
    	sort(v.begin(),v.end());
    	for(auto i:v) cout<<i.x<<" ";
    }

    Information

    ID
    6675
    Time
    1000ms
    Memory
    256MiB
    Difficulty
    7
    Tags
    # Submissions
    119
    Accepted
    28
    Uploaded By