class Solution {
public:
vector<int> plusOne(vector<int>& digits) {
vector<int> tp(digits), ret;
tp[tp.size() - 1]++;
for(int i = tp.size() - 1; i > 0; i--) {
//cout << i << " " << tp[i] << endl;
if (tp[i] >= 10) {
tp[i] %= 10;
tp[i-1]++;
} else break;
}
if (tp[0] >= 10) {
ret.push_back(1);
tp[0] %= 10;
}
for(int i = 0; i != (int)tp.size(); i++) {
ret.push_back(tp[i]);
}
return ret;
}
};