#include<bits/stdc++.h>

using namespace std;

string st;
int n,k;

deque<int> a;

int main()
{
    cin>>st>>k;
    int t=st.size();
    for(int i=0;i<t;i++) 
        a.push_back(st[i]-'0');
    for(int i=1;i<=k;i++)
        for(auto it=a.begin();it!=a.end();++it)
            if(*it>*(it+1)) {
                auto now=it;
                a.erase(it);
                it=now;
                break;
            }
    while(!a.empty()&&a.front()==0)
        a.pop_front();
    for(auto& it:a)
        cout<<it;
}

https://www.luogu.com.cn/record/108330803