automaton 去掉任意字符后成功转换

array 改变任意两字符后成功转换

#include 
  
   
#include 
   
     #include 
    
      #include 
     
       #include 
      
        #include 
       
         using namespace std; int main() { char str1[110],str2[110]; int h1[100],h2[100],i,j; while(cin>>str1>>str2) { memset(h1,0,sizeof(h1)); j=0; int l1=strlen(str1),l2=strlen(str2); for(i=0; i
        
         
 
         
 Suffix Structures time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output 
         
 Bizon the Champion isn't just a bison. He also is a favorite of the "Bizons" team.
 
         
 At a competition the "Bizons" got the following problem: "You are given two distinct words (strings of English letters), s and t. You need to transform word s into word t". The task looked simple to the guys because they know the suffix data structures well. Bizon Senior loves suffix automaton. By applying it once to a string, he can remove from this string any single character. Bizon Middle knows suffix array well. By applying it once to a string, he can swap any two characters of this string. The guys do not know anything about the suffix tree, but it can help them do much more.
 
         
 Bizon the Champion wonders whether the "Bizons" can solve the problem. Perhaps, the solution do not require both data structures. Find out whether the guys can solve the problem and if they can, how do they do it? Can they solve it either only with use of suffix automaton or only with use of suffix array or they need both structures? Note that any structure may be used an unlimited number of times, the structures may be used in any order.
 Input 
         
 The first line contains a non-empty word s. The second line contains a non-empty word t. Words s and t are different. Each word consists only of lowercase English letters. Each word contains at most 100 letters.
 Output 
         
 In the single line print the answer to the problem. Print "need tree" (without the quotes) if word s cannot be transformed into word teven with use of both suffix array and suffix automaton. Print "automaton" (without the quotes) if you need only the suffix automaton to solve the problem. Print "array" (without the quotes) if you need only the suffix array to solve the problem. Print "both" (without the quotes), if you need both data structures to solve the problem.
 
         
 It's guaranteed that if you can solve the problem only with use of suffix array, then it is impossible to solve it only with use of suffix automaton. This is also true for suffix automaton.
 Sample test(s) input 
         
automaton
tomat
 output 
         
automaton
 input 
         
array
arary
 output 
         
array
 input 
         
both
hot
 output 
         
both
 input 
         
need
tree
 output 
         
need tree
 Note 
         
 In the third sample you can act like that: first transform "both" into "oth" by removing the first character using the suffix automaton and then make two swaps of the string using the suffix array and get "hot".