【leetcode】Plus One

Question：

Given a number represented as an array of digits, plus one to the number.

Anwser 1：  szie  ->  0

class Solution {public:    vector<int> plusOne(vector<int> &digits) {        // Start typing your C/C++ solution below        // DO NOT write int main() function        vector<int> result(digits);                int carry = 1;        int size = digits.size();                for(int i = size - 1; i >= 0 ; i--){            int tmp = result[i] + carry;            result[i] = tmp % 10;            carry = tmp / 10;        }                if(carry > 0){            result.insert(result.begin(), carry);        }                return result;    }};

Anwser 2：  0  ->  szie

class Solution {public:    vector<int> plusOne(vector<int> &digits) {        // Start typing your C/C++ solution below        // DO NOT write int main() function        vector<int> result(digits);        reverse(result.begin(), result.end());                int carry = 1;        int size = digits.size();                for(int i = 0; i < size; i++){            int tmp = result[i] + carry;            result[i] = tmp % 10;            carry = tmp / 10;        }                if(carry == 1){            result.push_back(carry);        }                reverse(result.begin(), result.end());                return result;    }};

參考推薦：
leetcode.com

cplusplus vector