高除低
#include<iostream>
#include<vector>
using namespace std;
int main(){
string s;
cin>>s;
vector<int> a;
int b;
cin>>b;
for(int i=s.size()-1;i>-1;i--){
a.push_back(s[i]-'0');
}
int sam=0;
vector<int> d(a.size(),0);
for(int i=0;i<a.size();i++){
a[i]+=sam*10;
d[i]=a[i]/b;
sam=a[i]%b;
}
while(d.size()>1&&d.back()==0){
d.pop_back();
}
for(int i=d.size()-1;i>=0;i--){
cout<<d[i];
}
return 0;
}