每日一题洛谷P1106 删数问题c++

#include<iostream>
#include<vector>
using namespace std;
int main() {
	string n;
	int k;
	cin >> n >> k;
	vector<char> s(n.begin(), n.end());
	int i = 0;
	while (k) {
		if (i == s.size() - 1 || s[i] > s[i + 1]) {
			k--;
			s.erase(s.begin() + i, s.begin() + i + 1);
			i = 0;
		}
		else i++;
	}
	if (s.size() == 1)cout << s[0];
	else {
		int flag = 0;
		for (int j = 0; j < s.size() ; j++) {
			if (flag || s[j] != '0') {
				cout << s[j];
				flag = 1;
			}
		}
	}
	return 0;
}