View Code of Problem 609

#include <iostream>
#include <cstdio>
using namespace std;
int main(){
    string s;
    while(cin>>s){
        int n;
        cin>>n;
        while(n--){
        for(int i=0;i<s.length();i++){
            if(s[i]>s[i+1]||i==s.length()-1){
                s.erase(i,1);
            break;}
            }
        }
        int i=0;
        for(i=0;i<s.length();){
            if(s[i]=='0')
                i++;
            else
                break;
        }
        if(i<s.length())
        cout<<s.substr(i)<<endl;
        else
            cout<<0<<endl;
    }
    return 0;
}