Submission #2360755

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Source Code Expand

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
typedef vector<int> vi;
typedef pair<int,int> pi;
#define inf 1000000000
#define rep(i,a,b) for (int i = a; i <= b; i++)
#define rep1(i, a, b) for(int i =a; i >=b; i--)
#define f first
#define ss second
#define pb push_back
//#define mp make_pair

int freq[55][27], n,ans[27];
string s[55];

int main(){

ios::sync_with_stdio(0);
cin.tie(0);

cin >> n;
rep(i, 0, n-1){
cin >> s[i];
rep(j, 0, s[i].size()-1){
freq[i][s[i][j]-'a']++;
}
}

rep(i, 0, 25){
ans[i]=inf;
rep(j, 0, n-1){
ans[i]=min(freq[j][i], ans[i]);
}
}

string an;
rep(i, 0, 25){
if(ans[i]) {
 rep(j, 0, ans[i]-1)an+= i+'a';
}
}
cout << an << endl;
}

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