LintCode 640 - Edit Distance II


http://lintcode.com/en/problem/edit-distance-ii/
Given two strings S and T, determine if they are both one edit distance apart.
Example
Given s = "aDb", t = "adb"
return true
http://blog.csdn.net/sunday0904/article/details/71154703
首先判断两个字符串的长度,是否符合一个编辑距离。然后判断是要用替换还是插入。
  1.     public boolean isOneEditDistance(String s, String t) {  
  2.         int slen = s.length();  
  3.         int tlen = t.length();  
  4.         int temp = slen - tlen;  
  5.         if(s.equals(t)) return false;  
  6.         if(temp == 0){  
  7.             boolean flag = true;  
  8.             for(int i = 0; i< slen ;i++){  
  9.                 if(s.charAt(i) != t.charAt(i)){  
  10.                     if(flag){  
  11.                         flag = false;  
  12.                     }else{  
  13.                         return false;  
  14.                     }  
  15.                 }  
  16.             }  
  17.             return true;  
  18.         }else if(temp == 1){  
  19.             if(s.substring(0 , tlen).equals(t)){  
  20.                 return true;  
  21.             }  
  22.             boolean flag = true;  
  23.             for(int i = 0;i<slen;i++){  
  24.                 if(flag){  
  25.                     if(s.charAt(i) != t.charAt(i)){  
  26.                         flag = false;  
  27.                     }      
  28.                 }else{  
  29.                     if(s.charAt(i) != t.charAt(i - 1)){  
  30.                         return false;  
  31.                     }  
  32.                 }  
  33.                   
  34.             }  
  35.             return true;  
  36.         }else if(temp == -1){  
  37.             if(t.substring(0 , slen).equals(s)){  
  38.                 return true;  
  39.             }  
  40.             boolean flag = true;  
  41.             for(int i = 0;i<tlen;i++){  
  42.                 if(flag){  
  43.                     if(t.charAt(i) != s.charAt(i)){  
  44.                         flag = false;  
  45.                     }      
  46.                 }else{  
  47.                     if(t.charAt(i) != s.charAt(i - 1)){  
  48.                         return false;  
  49.                     }  
  50.                 }  
  51.                   
  52.             }  
  53.             return true;  
  54.         }else{  
  55.             return false;  
  56.         }  
  57.     } 


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