LeetCode——日常刷题(三)

class Solution {
    public String defangIPaddr(String address) {
            StringBuffer stringBuffer=new StringBuffer();
            for(int i=0;i<address.length();i++){
               if(address.charAt(i) == '.'){
                   stringBuffer.append("[.]");
               }else{
                   stringBuffer.append(address.charAt(i));
               }           
            }
            return new String(stringBuffer);
    }
}

class Solution{
    public String replaceSpace(String s){
        StringBuilder sb=new StringBuilder();
        for(Character c:s.toCharArray()){
            if(c==' '){
                sb.append("%20");
                }
                else{ 
                    sb.append(c);
                }
        }
            return sb.toString();
        }
    }

class Solution {
     public int[] smallerNumbersThanCurrent(int[] nums) {
     int len = nums.length;
     int[] res = new int[len];
     for (int i = 0; i < len; i++) {
         for (int j = 0; j < len; j++) { 
             if (i == j) continue;
             if (nums[i] > nums[j]) res[i]++;
         }
     }
     return res;
 }
}

class Solution {
    public int[] createTargetArray(int[] nums, int[] index) {
        List<Integer> list = new ArrayList<Integer>();
        for (int i = 0; i < nums.length; ++i) {
            list.add(index[i], nums[i]);
        }
        int[] res = new int[nums.length];
        for (int i = 0; i < nums.length; ++i) {
            res[i] = list.get(i);
        }
        return res;
    }
}