1 #include <bits/stdc++.h>
2 #define _for(i,a,b) for(int i = (a);i < (b);i ++)
3 #define pb push_back
4 using namespace std;
5
6 int main()
7 {
8 int n;
9 while(~scanf("%d",&n))
10 {
11 string s[n],rnt;
12 _for(i,0,n)
13 {
14 cin >> s[i];
15 }
16 rnt += s[0];
17 _for(i,1,n)
18 {
19 int j = 0;
20 for(;j < rnt.size();j ++)
21 if(rnt[j]==s[i][0])
22 {
23 int flag = 0;
24 for(int k = 0;k < s[i].size() && j+k < rnt.size();k ++)
25 {
26 if(s[i][k]!=rnt[j+k])
27 {
28 flag = 1;
29 break;
30 }
31 }
32 if(!flag&&s[i].size()>=rnt.size()-j)
33 {
34 break;
35 }
36 }
37 string tmp;
38 _for(k,rnt.size()-j,s[i].size())
39 tmp += s[i][k];
40 rnt += tmp;
41 }
42 cout << rnt << endl;
43 }
44 return 0;
45 }
