485. Max Consecutive Ones
Given a binary array, find the maximum number of consecutive 1s in this array.
Example 1:
Input: [1,1,0,1,1,1]
Output: 3
Explanation: The first two digits or the last three digits are consecutive 1s.
The maximum number of consecutive 1s is 3.
Note:
The input array will only contain 0 and 1.
The length of input array is a positive integer and will not exceed 10,000
分析:设立cnt数组,表示在nums[i]处当前连续的1的值,maxn取其最大的值,在遇到nums[i] == 0的时候更新maxn的值。最后还要更新一下防止最后一个是1.
class Solution {
public:
int findMaxConsecutiveOnes(vector<int>& nums) {
vector<int> cnt(nums.size());
int maxn = 0;
cnt[0] = nums[0];
for(int i = 1; i < nums.size(); i++) {
if(nums[i] == 0) {
cnt[i] = 0;
maxn = max(maxn, cnt[i-1]);
} else {
cnt[i] = cnt[i-1] + 1;
}
}
maxn = max(maxn, cnt[nums.size() - 1]);
return maxn;
}
};
本文介绍了一种通过遍历二进制数组并使用辅助数组记录连续1的数量来找到最长连续1序列的方法。此方法适用于输入数组仅包含0和1的情况,并确保了高效地找出最大连续1的个数。
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