#include<bits/stdc++.h> using namespace std; string s; int del; int main() { cin >> s >> del; int delet = 0; for(int i = 0;i < del;i++) { delet = 0; while(s[delet] < s[delet+1]) { delet++; } s.erase(0+delet,0+delet); } while(s.size() != 1 && s[0] == '0') { s.erase(0,0); } cout << s << endl; return 0; }