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B.cpp
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61 lines (60 loc) · 1.32 KB
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#include<bits/stdc++.h>
#define vi vector<int>
#define mp map<int,int>
#define ump unordered_map <int,int>
#define ll long long int
#define pb push_back
#define mod 1000000007
#define int long long
#define loop(i,x,n) for(int i=x;i<n;i++)
#define rloop(i,n) for(int i=n-1;i>=0;i--)
using namespace std;
/*************************************************************************************************/
int dp[105][105];
int lcs(int n,int m,string s,string t)
{
if(n==0 || m==0)
{
return 0;
}
if(dp[n][m]!=-1)
return dp[n][m];
if(s[n-1]==t[m-1])
return dp[n][m]=1+lcs(n-1,m-1,s,t);
else
{
return dp[n][m]=max(lcs(n,m-1,s,t),lcs(n-1,m,s,t));
}
}
signed main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int n,m;
string s,t;
cin>>s>>t;
n=s.length(),m=t.length();
memset(dp,-1,sizeof(dp));
int l=lcs(n,m,s,t);
if(l==m)
{
cout<<"automaton";
return 0;
}
sort(s.begin(),s.end());
sort(t.begin(),t.end());
if(s==t)
{
cout<<"array";
return 0;
}
memset(dp,-1,sizeof(dp));
l=lcs(n,m,s,t);
if(l==m)
{
cout<<"both";
return 0;
}
cout<<"need tree";
return 0;
}