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A. Array.cpp
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A. Array.cpp
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// https://codeforces.com/contest/300/problem/A
#include <bits/stdc++.h>
using namespace std;
int main() {
vector<int> pos,neg,zero;
int n;
cin>>n;
int a[n];
for(int i=0;i<n;i++){
cin>>a[i];
if(a[i] <0){
neg.push_back(a[i]);
}
else if(a[i]>0){
pos.push_back(a[i]);
}
else{
zero.push_back(a[i]);
}
}
if(neg.size()%2==0){
int t=neg.back();
neg.pop_back();
zero.push_back(t);
}
if(pos.empty()){
int a=neg.back();
neg.pop_back() ;
int b =neg.back();
neg.pop_back() ;
pos.push_back(a);
pos.push_back(b);
}
//print
cout<<neg.size()<<" ";
for(int i=0;i<neg.size();i++){
cout<<neg[i]<<" ";
}
cout<<"\n";
cout<<pos.size()<<" ";
for(int i=0;i<pos.size();i++){
cout<<pos[i]<<" ";
}
cout<<"\n";
cout<<zero.size()<<" ";
for(int i=0;i<zero.size();i++){
cout<<zero[i]<<" ";
}
}