inplace0_1.cpp

// Author : Shankar Balajee Sambasivam
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,fma")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>  
#include <chrono>
#include <random>
#include <iomanip>
#include <fstream>
 
using namespace std;
 
/* ************************************************************************************************************************************ */
typedef long long ll;
typedef long double ld;
typedef pair<int,int> p32;
typedef pair<ll,ll> p64;
typedef pair<double,double> pdd;
typedef vector<ll> v64;
typedef vector<int> v32;
typedef vector<vector<int> > vv32;
typedef vector<vector<ll> > vv64;
typedef vector<vector<p64> > vvp64;
typedef vector<p64> vp64;
typedef vector<p32> vp32;
ll MOD = 998244353;
double eps = 1e-12;
#define forn(i,e) for(ll i = 0; i < e; i++)
#define forsn(i,s,e) for(ll i = s; i < e; i++)
#define rforn(i,s) for(ll i = s; i >= 0; i--)
#define rforsn(i,s,e) for(ll i = s; i >= e; i--)
#define endl "\n"
#define dbg(x) cout<<#x<<" = "<<x<<ln
#define mp make_pair
#define pb push_back
#define fast_cin() ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL)
#define all(x) (x).begin(), (x).end()
#define sz(x) ((ll)(x).size())
#define int long long
 

/* ************************************************************************************************************************************* */
/* CODE BEGINS HERE */

signed main()
{
   fast_cin();
   int a[]={0,1,0,1,1,0};
   int n=6;
   int l=0;
   int r=n-1;
   while(l<r)
   {
        while(a[l]!=1 and r>l)
        {
            l++;
        }
        while(a[r]!=0 and r>l)
        {
            r--;
        }
        int t=a[l];
        a[l]=a[r];
        a[r]=t;
   }
   forn(i,6)
   {
    cout << a[i] << ' ';
   }
}