Codeforces 934D - A Determined Cleanup

#include<bits/stdc++.h>
using namespace std;
#define ll long long 
#define pb push_back
#define mem(a,b) memset(a,b,sizeof(a))

const int N=2e3+5;
vector<int>ans;
int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    ll p,k;
    cin>>p>>k;
    int t=0;
    while(p){
        if(t%2==0)ans.pb(p%k),p/=k;
        else{
            if(p%k)ans.pb(k-p%k),p=p/k+1;
            else ans.pb(0),p=p/k;
        }
        t++;
    }
    cout<<ans.size()<<endl;
    for(int i=0;i<ans.size();i++)cout<<ans[i]<<‘ ‘;
    cout<<endl;
    return 0;
}