希望有人能帮帮我，我是个蒟蒻

#include<iostream>
#include<cstdio>
#include<cmath>
#include<algorithm>
#include<cstring>
#include<string>
using namespace std;
int main(){
    string n,ans="";
    int s,i;
    cin>>n>>s;
    int len=n.size();
    int count=0;
    while(count<len){
        if(n[i]<=n[i+1]){
            i++;
            ans+=n[i-1];
            count++;
            continue;
        }
        if(s>0&&n[i]>n[i+1]){
        	s--;
			count++;
			i++;
			continue;
		}else{
			i++;
			count++;
			continue;
		}
    }
    int sum=0;
    while(ans[sum]=='0'&&len-sum>1){
    	sum++;
	}
    for(int i=sum;i<len;i++){
    	cout<<ans[i];
	}
    return 0;
}