第18题 Remove Element

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Given an array and a value, remove all instances of that value in place and return the new length.

The order of elements can be changed. It doesn‘t matter what you leave beyond the new length.

Solution1：

public class Solution {
    public int removeElement(int[] A, int elem) {
        int length=0, ptr=0;
        for(int i=0; i<A.length;i++){
            if(A[i]!=elem){
                A[ptr]=A[i];
                ptr++;
                length++;
            }
        }
        return length;
    }
}

public class Solution {
    public int removeElement(int[] A, int elem) {
        int length=A.length;
        for(int i=0; i<length;i++){
            if(A[i]==elem){
                A[i]=A[length-1];
                length--;
                i--;
            }
        }
        return length;
    }
}

第18题 Remove Element

标签：style   color   io   ar   java   for   strong   数据   sp   

原文地址：http://blog.csdn.net/amberfeb/article/details/39993921