Algorithm

B. Substrings Sort
time limit per test
1 second
memory limit per test
256 megabytes
problem link- https://codeforces.com/contest/988/problem/B
input
standard input
output
standard output

You are given n� strings. Each string consists of lowercase English letters. Rearrange (reorder) the given strings in such a way that for every string, all strings that are placed before it are its substrings.

String a� is a substring of string b� if it is possible to choose several consecutive letters in b� in such a way that they form a�. For example, string "for" is contained as a substring in strings "codeforces", "for" and "therefore", but is not contained as a substring in strings "four", "fofo" and "rof".

Input

The first line contains an integer n� (1≤n≤1001≤�≤100) — the number of strings.

The next n� lines contain the given strings. The number of letters in each string is from 11 to 100100, inclusive. Each string consists of lowercase English letters.

Some strings might be equal.

Output

If it is impossible to reorder n� given strings in required order, print "NO" (without quotes).

Otherwise print "YES" (without quotes) and n� given strings in required order.

Examples
input
Copy
5
a
aba
abacaba
ba
aba
output
Copy
YES
a
ba
aba
aba
abacaba
input
Copy
5
a
abacaba
ba
aba
abab
output
Copy
NO
input
Copy
3
qwerty
qwerty
qwerty
output
Copy
YES
qwerty
qwerty
qwerty
Note

In the second example you cannot reorder the strings because the string "abab" is not a substring of the string "abacaba".

 



 

Code Examples

#1 Code Example with C++ Programming

Code - C++ Programming

#include <bits/stdc++.h>

using namespace std;

int n;
bool vis[101];
string s[101];
vector<string> sol;

int main() {
  cin >> n;
  for(int i = 0; i < n; ++i)
  	cin >> s[i];

  for(int k = 0; k < 100; ++k) {
	  for(int i = 0; i < n; ++i) {
	  	if(vis[i])
	  		continue;
	  	bool ok = true;
	  	for(int j = 0; j < n; ++j) {
	  		if(i == j || vis[j])
	  			continue;

	  		if(s[i].find(s[j]) == string::npos) {
	  			ok = false;
	  			break;
	  		}
	  	}
	  	if(ok) {
	  		sol.push_back(s[i]);
	  		vis[i] = true;
	  	}
	  }
	}

  if(sol.size() != n)
  	cout << "NO" << endl;
  else {
  	cout << "YES" << endl;
  	for(int i = sol.size() - 1; i >= 0; --i)
  		cout << sol[i] << endl;
  }

  return 0;
}
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Input

x
–
+
cmd
5
a
aba
abacaba
ba
aba

Output

x
–
+
cmd
YES
a
ba
aba
aba
abacaba
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Demonstration

Codeforces Solution-B. Substrings Sort-Solution in C, C++, Java, Python,Substrings Sort,Codeforces Solution

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