CSES - Datatähti Open 2021 - Results
Submission details
Task:Split in Three
Sender:Nagibator228
Submission time:2021-01-31 11:09:36 +0200
Language:C++11
Status:READY
Result:100
Feedback
groupverdictscore
#1ACCEPTED22
#2ACCEPTED78
Test results
testverdicttimegroup
#1ACCEPTED0.01 s1, 2details
#2ACCEPTED0.01 s1, 2details
#3ACCEPTED0.01 s1, 2details
#4ACCEPTED0.01 s1, 2details
#5ACCEPTED0.01 s1, 2details
#6ACCEPTED0.01 s1, 2details
#7ACCEPTED0.01 s1, 2details
#8ACCEPTED0.01 s1, 2details
#9ACCEPTED0.01 s2details
#10ACCEPTED0.01 s2details
#11ACCEPTED0.01 s2details
#12ACCEPTED0.01 s2details
#13ACCEPTED0.01 s2details
#14ACCEPTED0.01 s2details
#15ACCEPTED0.01 s2details

Code

#include <bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>

//#pragma GCC optimize ("trapv")
//#pragma GCC optimize ("O3")
//#pragma GCC optimize ("Ofast")
//#pragma GCC optimize ("unroll-loops")
//#pragma GCC target ("sse,sse2,sse3,ssse3,sse4,avx,sse4.1,sse4.2,mmx")

typedef long long ll;
#define ff first
#define what(x) cerr << #x << " = " << x << '\n'
#define ss second
#define pb push_back
#define ld long double
#define ins insert
#define boost ios_base::sync_with_stdio(false), cin.tie(0), cout.tie(0);
#define MOD 1000000007

using namespace std;

mt19937_64 mt_rnd_64(chrono::steady_clock::now().time_since_epoch().count());
int rnd(int l, int r){
    return mt_rnd_64() % (r - l + 1) + l;
}

using namespace __gnu_pbds;

template<class T>
using ordered_set=tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;

template<class T>
using ordered_multiset=tree<T,null_type,less_equal<T>,rb_tree_tag,tree_order_statistics_node_update>;

const ll N = 1e6 + 10;
const ll inf = 1e18 + 10;

ll ans[N];

signed main()
{
    //freopen("input.txt", "r", stdin);
    //freopen("output.txt", "w", stdout);
    ll n;
    cin >> n;
    ll sum = (n * n + n) / 2;
    if (sum % 3) cout << "IMPOSSIBLE";
    else
    {
        sum /= 3;
        sum--;
        for (ll T = 1; T <= 3; ++T)
        {
            ll cur = sum;
            for (ll i = n; i >= 1; --i)
            {
                if (!cur) break;
                if (ans[i]) continue;
                if (cur - i >= 0)
                {
                    ans[i] = T;
                    cur -= i;
                }
//                cout << i << ' ' << cur << '\n';
            }
            sum++;
        }
        for (ll i = 1; i <= n; ++i) cout << ans[i] << ' ';
    }




    return 0;
}

Test details

Test 1

Group: 1, 2

Verdict: ACCEPTED

input
3

correct output
1 2 3 

user output
1 2 3 

Test 2

Group: 1, 2

Verdict: ACCEPTED

input
4

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 3

Group: 1, 2

Verdict: ACCEPTED

input
5

correct output
1 3 1 3 2 

user output
3 3 3 1 2 

Test 4

Group: 1, 2

Verdict: ACCEPTED

input
6

correct output
1 3 2 2 1 3 

user output
3 2 3 3 2 1 

Test 5

Group: 1, 2

Verdict: ACCEPTED

input
7

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 6

Group: 1, 2

Verdict: ACCEPTED

input
8

correct output
2 3 1 2 3 3 2 1 

user output
3 3 1 3 2 3 2 1 

Test 7

Group: 1, 2

Verdict: ACCEPTED

input
9

correct output
1 2 3 1 2 3 3 2 1 

user output
3 3 3 3 1 3 2 2 1 

Test 8

Group: 1, 2

Verdict: ACCEPTED

input
10

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 9

Group: 2

Verdict: ACCEPTED

input
42

correct output
1 3 2 2 1 3 1 2 3 3 2 1 1 2 3 ...

user output
3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 ...

Test 10

Group: 2

Verdict: ACCEPTED

input
95

correct output
1 3 1 3 2 1 2 3 3 2 1 1 2 3 3 ...

user output
3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 ...

Test 11

Group: 2

Verdict: ACCEPTED

input
96

correct output
1 3 2 2 1 3 1 2 3 3 2 1 1 2 3 ...

user output
3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 ...

Test 12

Group: 2

Verdict: ACCEPTED

input
97

correct output
IMPOSSIBLE

user output
IMPOSSIBLE

Test 13

Group: 2

Verdict: ACCEPTED

input
98

correct output
2 3 1 2 3 3 2 1 1 2 3 3 2 1 1 ...

user output
3 3 3 3 1 3 3 3 3 3 3 3 3 3 3 ...

Test 14

Group: 2

Verdict: ACCEPTED

input
99

correct output
1 2 3 1 2 3 3 2 1 1 2 3 3 2 1 ...

user output
3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 ...

Test 15

Group: 2

Verdict: ACCEPTED

input
100

correct output
IMPOSSIBLE

user output
IMPOSSIBLE