leetcode/26/01/66.cpp

#include <vector>

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