1748: 删数问题

#include <iostream>
#include <string>
using namespace std;

int main()
{
	string s;
	int k;
	cin >> s >> k;
	
	int n = 0, i = -1;
	int len = s.length();
	while(n < k)
	{
		i ++;
		if(s[i] > s[i + 1])
		{
			s.erase(i, 1);
			n ++;
			i = -1;
		}
	}
	i = 0;
	while(s[i] == ‘0‘)
		i ++;
	
	cout << s.substr(i, len) << endl;
	
	return 0;
}