38 lines
692 B
C++
38 lines
692 B
C++
#include <iostream>
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#include <string>
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#include <vector>
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#include <algorithm>
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#include <cstdio>
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using namespace std;
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int main()
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{
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vector<string> v;
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char ch[10];
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string s;
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int n;
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cin>>n;
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int i,j;
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while(cin>>n)
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{
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v.clear();
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for(i=0;i<n;i++)
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{
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scanf("%s",&ch);
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s=ch;
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v.push_back(s);
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}
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sort(v.begin(),v.end());
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for(i=0;i<n-1;i++)
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{
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if(v[i+1].find(v[i])==0)
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{
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cout<<"NO"<<endl;
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goto RL;
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}
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}
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cout<<"YES"<<endl;
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RL:continue;
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}
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return 0;
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}
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