Submission #3579795

---

Source Code Expand

#include<bits/stdc++.h>
using namespace std;
int n;
char k;
set <string> s;
bool b;
int main(){
	cin>>n;
	for(int i=0;i<n;i++){
		string c;
		cin>>c;
		if(s.find(c)!=s.end() || (i!=0 && c[0]!=k))
			b=true;
		else
			s.insert(c);
		k=c[c.size()-1];
	}
	if(b)
		cout<<"No";
	else
		cout<<"Yes";
}

Submission Info

Judge Result