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LeetCode: 60 plus one (加一) #93

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resse92 opened this issue Oct 17, 2018 · 0 comments
Open

LeetCode: 60 plus one (加一) #93

resse92 opened this issue Oct 17, 2018 · 0 comments
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@resse92
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resse92 commented Oct 17, 2018

从最后一个加一,有进制则前一位继续加。。。

class Solution {
public:
    vector<int> plusOne(vector<int>& digits) {
        int n = digits.size();
        for (int i = n - 1; i >= 0; --i) {
            if (digits[i] == 9) digits[i] = 0;
            else {
                digits[i] += 1;
                return digits;
            }
        }
        if (digits.front() == 0) digits.insert(digits.begin(), 1);
        return digits;
    }
};
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