LeetCode 80. Remove Duplicates from Sorted Array II
2016-07-06 14:41
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描述
给出一个数列，求出一个数列，使得其中重复元素的次数最多不超过2次，问这个数列的长度，并要求把该长度下的数存放在数列中。解决
利用一个标志cnt,统计当前数在结果数列中出现的次数，遍历过去即可。O(n)class Solution {
public:
int removeDuplicates(vector<int>& nums) {
int lenth = nums.size();
if (lenth == 0){
return 0;
}
int index = 0;
nums[index] = nums[0];
int cnt = 1;
for (int i = 1; i < lenth; ++i){
if((nums[i] == nums[index] && cnt == 1)){
nums[++index] = nums[i];
++cnt;
}
else if (nums[i] != nums[index]){
nums[++index] = nums[i];
cnt = 1;
}
}
return index + 1;
}
};
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