#include<bits/stdc++.h>
 
 
using namespace std;
 
stack <int> stc;
queue <int> q;
vector <int> v;
 
int main(){
    int i, m, n;
    int coach;
 
    while(scanf("%d", &coach) && coach){
        stc = stack<int>();
        q = queue<int>();
 
        while(1){
            stc = stack<int>();
            q = queue<int>();
 
            cin>> n;
            q.push(n);
 
            if(n == 0){
                cout<< endl;
                break;
            }
            for(i=1; i<coach; i++){
                cin>> n;
                q.push(n);
            }
 
            m = 1;
            while(m<=coach){
                stc.push(m);
 
                while(!stc.empty() && stc.top()==q.front()){
                    stc.pop();
                    q.pop();
                }
                m++;
            }
            if(stc.size()==0){
                cout<<"Yes"<<endl;
            }
            else{
                cout <<"No"<<endl;
 
            }
        }
 
    }
 
 
    return 0;
}
 

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5
1 2 3 4 5
5 4 1 2 3
1 4 3 2 5
3 4 2 5 1
3 4 2 1 5
4 3 5 2 1
0
3
1 2 3
1 3 2
2 1 3
2 3 1
3 1 2
3 2 1
0
4
1 2 3 4
1 2 4 3
1 3 2 4
1 3 4 2
1 4 2 3
1 4 3 2
2 1 3 4
2 1 4 3
2 3 1 4
2 3 4 1
2 4 1 3
2 4 3 1
3 1 2 4
3 1 4 2
3 2 1 4
3 2 4 1
3 4 1 2
3 4 2 1
4 1 2 3
4 1 3 2
4 2 1 3
4 2 3 1
4 3 1 2
4 3 2 1
0
10
5 7 10 9 8 6 4 3 2 1
5 6 4 8 7 3 2 9 1 10
0
0