Cel mai mic numar

#include <bits/stdc++.h>
using namespace std;
string s;
int steve[100001],vf;
int main()
{
#ifdef HOME
    freopen("test.in","r",stdin);
    freopen("test.out","w",stdout);
#endif // HOME
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    int n,k,i;
    cin>>n>>k>>s;
    for(i=0; i<n; i++)
    {
        while(k&&vf>(s[i]=='0')&&s[i]-'0'<steve[vf])
        {
            vf--;
            k--;
        }
        if(k>=vf&&steve[vf]==0&&s[i]-'0'<steve[1]&&s[i]!='0')
        {
            k-=vf;
            vf=0;
        }
        steve[++vf]=s[i]-'0';
    }
    while(k&&vf)
    {
        k--;
        vf--;
    }
    for(i=1; i<=vf; i++)
        cout<<steve[i];
    return 0;
}