Submission #4062334

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Source Code Expand

#include <iostream>
#include <set>
using namespace std;
int main()
{
  int N;
  cin >> N;
  string W[N];
  for (int i = 0; i < N; i++)
    cin >> W[i];
  set<string> st;
  st.insert(W[0]);
  char last = W[0].at(W[0].length() - 1);
  string ans = "Yes";
  for (int i = 1; i < N; i++)
  {
    if (st.find(W[i]) != st.end())
      ans = "No";
    if (last != W[i].at(0))
      ans = "No";
    st.insert(W[i]);
    last = W[i].at(W[i].length() - 1);
  }
  cout << ans << endl;
  return 0;
}

Submission Info

Judge Result