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NOI 2024

Chair Game

  • Start: 2024-03-06 15:00:00
  • End: 2024-03-06 20:00:00
CSES - NOI 2024 - Results
Submission details
Task:Chair Game
Sender:Erik Hedin
Submission time:2024-03-17 09:13:18 +0200
Language:C++ (C++17)
Status:READY
Result:100
Feedback
groupverdictscore
#1ACCEPTED8
#2ACCEPTED5
#3ACCEPTED4
#4ACCEPTED7
#5ACCEPTED12
#6ACCEPTED15
#7ACCEPTED20
#8ACCEPTED29
Test results
testverdicttimegroup
#1ACCEPTED0.00 s1, 7, 8details
#2ACCEPTED0.00 s1, 7, 8details
#3ACCEPTED0.01 s1, 7, 8details
#4ACCEPTED0.01 s1, 7, 8details
#5ACCEPTED0.01 s1, 7, 8details
#6ACCEPTED0.01 s7, 8details
#7ACCEPTED0.02 s7, 8details
#8ACCEPTED0.07 s2, 8details
#9ACCEPTED0.01 s3, 4, 5, 6, 8details
#10ACCEPTED0.01 s3, 4, 5, 6, 8details
#11ACCEPTED0.01 s3, 4, 5, 6, 8details
#12ACCEPTED0.14 s3, 4, 5, 6, 8details
#13ACCEPTED0.01 s4, 5, 6, 7, 8details
#14ACCEPTED0.04 s4, 5, 6, 8details
#15ACCEPTED0.01 s4, 5, 6, 8details
#16ACCEPTED0.10 s4, 5, 6, 8details
#17ACCEPTED0.01 s5, 6, 7, 8details
#18ACCEPTED0.01 s5, 6, 8details
#19ACCEPTED0.01 s5, 6, 8details
#20ACCEPTED0.13 s5, 6, 8details
#21ACCEPTED0.00 s1, 6, 7, 8details
#22ACCEPTED0.01 s6, 7, 8details
#23ACCEPTED0.02 s6, 8details
#24ACCEPTED0.16 s6, 8details
#25ACCEPTED0.01 s8details
#26ACCEPTED0.39 s8details
#27ACCEPTED0.02 s3, 4, 5, 6, 8details
#28ACCEPTED0.02 s8details
#29ACCEPTED0.39 s8details
#30ACCEPTED0.39 s8details

Code

#include <iostream>
#include <vector>
#include <algorithm>
#include <set>
#include <map>
#include <numeric>
#include <functional>
#include <queue>

using namespace std;

typedef long long int ll;
typedef vector<ll> vll;
typedef pair<ll, ll> pll;
typedef vector<pll> vpll;
typedef vector<vll> vvll;
typedef vector<vpll> vvpll;
typedef map<ll, ll> mll_ll;

#define rep(i, a, b) for (ll i = a; i < b; i++)
#define sz(a) (ll) a.size()
#define mp(a, b) make_pair(a, b)
#define pb(a) push_back(a)
#define trav(itr, a, t) for (t::iterator itr = a.begin(); itr != a.end(); itr++)
#define all(a) a.begin(), a.end()

ll n;
vll s;

ll normalizeb(const ll& x) {return ((((x - 1) % n) + n) % n) + 1;}
ll normalizea(const ll& x) {return ((x % n) + n) % n;}

bool is_sol(const vll& a, const vll& b, const vll& c) { // check if {a[n - 2], a[n - 2]} + {b[n - 2], b[n - 1]} =?= {c[n - 2], c[n - 1]}
    return 
        ((a[n - 2] + b[n - 2] - c[n - 2]) % n == 0) ||
        ((a[n - 1] + b[n - 2] - c[n - 2]) % n == 0) ||
        ((a[n - 2] + b[n - 1] - c[n - 2]) % n == 0) ||
        ((a[n - 1] + b[n - 1] - c[n - 2]) % n == 0);
}

void modify(vll& a, vll& b, vll& c, mll_ll& ra) { // assume 0, 1, 2, ..., n - 3 are fine. n - 1 is extra
    //cout << is_sol(a, b, c) << endl;
    while (!is_sol(a, b, c)) {
        ll r = ra[normalizea(c[n - 2] - b[n - 2])];
        swap(b[n - 2], b[r]);
        swap(c[n - 2], c[r]);
        swap(c[n - 2], c[n - 1]);
        //cout << a[r] << " " << b[r] << " " << c[r] << endl;
        //cout << is_sol(a, b, c) << endl;
    }
    // resolve which pair is good
    if ((a[n - 2] + b[n - 2] - c[n - 2]) % n == 0) {
        //cout << "A" << endl;
    } else if ((a[n - 1] + b[n - 2] - c[n - 2]) % n == 0) {
        //cout << "B" << endl;
        swap(a[n - 1], a[n - 2]);
        swap(ra[a[n - 1]], ra[a[n - 2]]);
    } else if ((a[n - 2] + b[n - 1] - c[n - 2]) % n == 0) {
        swap(a[n - 1], a[n - 2]);
        swap(ra[a[n - 1]], ra[a[n - 2]]);
        swap(c[n - 1], c[n - 2]);
    } else if ((a[n - 1] + b[n - 1] - c[n - 2]) % n == 0) {
        //cout << "D" << endl;
        swap(c[n - 1], c[n - 2]);
    }
}

void solve() {
    cin >> n;
    s.resize(n);
    rep(i, 0, n) cin >> s[i];

    if (accumulate(all(s), 0LL) % n) {
        cout << "NO\n";
        return;
    }

    vll a(n);
    vll b(n, 0);
    vll c(n);
    mll_ll ra;
    rep(i, 0, n) {
        a[i] = i;
        ra[i] = i;
        c[i] = i;
    }

    rep(i, 0, n - 1) {
        // find the first b_j = 0
        ll j = 0;
        while (b[j] != 0) j++;

        //cout << "j = " << j << endl;

        b[j] = s[i];
        b[n - 1] -= s[i];

        swap(a[j], a[n - 2]);
        swap(ra[a[j]], ra[a[n - 2]]);
        swap(b[j], b[n - 2]);
        swap(c[j], c[n - 2]);

        modify(a, b, c, ra);

        /* cout << "a[]: ";
        rep(i, 0, n) cout << a[i] << " ";
        cout << endl;
        cout << "b[]: ";
        rep(i, 0, n) cout << b[i] << " ";
        cout << endl;
        cout << "c[]: ";
        rep(i, 0, n) cout << c[i] << " ";
        cout << endl;
        cout << "ra[]: ";
        rep(i, 0, n) cout << ra[i] << " ";
        cout << endl; */
    }

    vll answ(n);
    rep(i, 0, n) answ[a[i]] = normalizeb(b[i]);

    cout << "YES\n";
    rep(i, 0, n) cout << answ[i] << " ";
    cout << "\n";
}

int main() {
    cin.tie(NULL)->sync_with_stdio(false);

    ll testcases; cin >> testcases;
    rep(testcase, 0, testcases) solve();
    cout << flush;

    return 0;
}

Test details

Test 1

Group: 1, 7, 8

Verdict: ACCEPTED

input
637
1
1
2
1 1
...
view save

correct output
YES
1 
YES
1 1 
YES
...
view save

user output
YES
1 
YES
1 1 
YES
...
Truncated

Test 2

Group: 1, 7, 8

Verdict: ACCEPTED

input
246
7
1 1 1 1 1 1 1
7
1 1 2 1 1 7 1
...
view save

correct output
YES
1 1 1 1 1 1 1 
YES
1 1 1 1 2 7 1 
YES
...
view save

user output
YES
1 1 1 1 1 1 1 
YES
1 1 2 7 1 1 1 
YES
...
Truncated

Test 3

Group: 1, 7, 8

Verdict: ACCEPTED

input
810
8
1 1 1 1 1 1 1 1
8
1 1 1 8 1 1 2 1
...
view save

correct output
YES
1 1 1 1 1 1 1 1 
YES
1 1 2 8 1 1 1 1 
YES
...
view save

user output
YES
1 1 1 1 1 1 1 1 
YES
1 1 1 1 1 2 8 1 
YES
...
Truncated

Test 4

Group: 1, 7, 8

Verdict: ACCEPTED

input
1000
8
8 8 5 2 8 7 6 5
8
6 5 2 2 8 2 1 6
...
view save

correct output
NO
YES
8 2 2 6 2 5 1 6 
NO
NO
...
view save

user output
NO
YES
2 2 6 2 5 1 6 8 
NO
NO
...
Truncated

Test 5

Group: 1, 7, 8

Verdict: ACCEPTED

input
1000
8
2 1 7 7 2 3 8 2
8
4 1 5 4 7 3 5 3
...
view save

correct output
YES
7 2 2 7 1 3 8 2 
YES
4 4 7 3 3 5 5 1 
YES
...
view save

user output
YES
1 2 2 7 3 8 2 7 
YES
5 3 5 7 4 1 3 4 
YES
...
Truncated

Test 6

Group: 7, 8

Verdict: ACCEPTED

input
1000
16
15 16 6 4 14 2 1 6 2 16 10 2 9...
view save

correct output
NO
NO
NO
NO
NO
...
view save

user output
NO
NO
NO
NO
NO
...
Truncated

Test 7

Group: 7, 8

Verdict: ACCEPTED

input
1000
16
2 4 13 6 8 16 12 8 16 5 9 5 9 ...
view save

correct output
YES
13 5 2 8 12 2 8 5 16 16 9 6 9 ...
view save

user output
YES
5 2 4 6 9 11 2 8 12 9 2 16 5 1...
Truncated

Test 8

Group: 2, 8

Verdict: ACCEPTED

input
1000
1
1
2
1 2
...
view save

correct output
YES
1 
NO
YES
3 1 2 
...
view save

user output
YES
1 
NO
YES
3 1 2 
...
Truncated

Test 9

Group: 3, 4, 5, 6, 8

Verdict: ACCEPTED

input
988
1
1
2
1 1
...
view save

correct output
YES
1 
YES
1 1 
YES
...
view save

user output
YES
1 
YES
1 1 
YES
...
Truncated

Test 10

Group: 3, 4, 5, 6, 8

Verdict: ACCEPTED

input
199
1
1
2
1 1
...
view save

correct output
YES
1 
YES
1 1 
YES
...
view save

user output
YES
1 
YES
1 1 
YES
...
Truncated

Test 11

Group: 3, 4, 5, 6, 8

Verdict: ACCEPTED

input
1000
100
1 1 1 2 1 1 2 2 1 1 1 1 1 2 1 ...
view save

correct output
NO
NO
NO
NO
NO
...
view save

user output
NO
NO
NO
NO
NO
...
Truncated

Test 12

Group: 3, 4, 5, 6, 8

Verdict: ACCEPTED

input
1000
100
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...
view save

correct output
YES
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...
view save

user output
YES
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...
Truncated

Test 13

Group: 4, 5, 6, 7, 8

Verdict: ACCEPTED

input
963
1
1
2
1 1
...
view save

correct output
YES
1 
YES
1 1 
YES
...
view save

user output
YES
1 
YES
1 1 
YES
...
Truncated

Test 14

Group: 4, 5, 6, 8

Verdict: ACCEPTED

input
979
1
1
2
1 1
...
view save

correct output
YES
1 
YES
1 1 
YES
...
view save

user output
YES
1 
YES
1 1 
YES
...
Truncated

Test 15

Group: 4, 5, 6, 8

Verdict: ACCEPTED

input
1000
100
3 3 1 2 1 1 2 3 1 3 2 1 1 3 1 ...
view save

correct output
NO
NO
NO
NO
NO
...
view save

user output
NO
NO
NO
NO
NO
...
Truncated

Test 16

Group: 4, 5, 6, 8

Verdict: ACCEPTED

input
1000
100
1 2 2 2 2 1 1 1 2 3 1 1 3 2 1 ...
view save

correct output
YES
2 2 2 3 1 2 3 1 2 3 1 3 1 3 1 ...
view save

user output
YES
1 3 1 2 3 1 2 2 3 1 3 1 2 2 3 ...
Truncated

Test 17

Group: 5, 6, 7, 8

Verdict: ACCEPTED

input
980
1
1
2
1 1
...
view save

correct output
YES
1 
YES
1 1 
YES
...
view save

user output
YES
1 
YES
1 1 
YES
...
Truncated

Test 18

Group: 5, 6, 8

Verdict: ACCEPTED

input
947
1
1
2
1 1
...
view save

correct output
YES
1 
YES
1 1 
YES
...
view save

user output
YES
1 
YES
1 1 
YES
...
Truncated

Test 19

Group: 5, 6, 8

Verdict: ACCEPTED

input
1000
100
1 2 4 2 1 3 1 2 2 3 1 1 3 1 4 ...
view save

correct output
NO
NO
NO
NO
NO
...
view save

user output
NO
NO
NO
NO
NO
...
Truncated

Test 20

Group: 5, 6, 8

Verdict: ACCEPTED

input
1000
100
3 4 4 4 4 4 4 3 3 3 4 4 2 3 3 ...
view save

correct output
YES
4 2 4 4 1 3 4 2 4 2 3 4 2 4 4 ...
view save

user output
YES
2 3 3 4 2 4 4 1 4 2 4 2 3 3 4 ...
Truncated

Test 21

Group: 1, 6, 7, 8

Verdict: ACCEPTED

input
715
1
1
2
1 1
...
view save

correct output
YES
1 
YES
1 1 
YES
...
view save

user output
YES
1 
YES
1 1 
YES
...
Truncated

Test 22

Group: 6, 7, 8

Verdict: ACCEPTED

input
843
1
1
2
1 1
...
view save

correct output
YES
1 
YES
1 1 
YES
...
view save

user output
YES
1 
YES
1 1 
YES
...
Truncated

Test 23

Group: 6, 8

Verdict: ACCEPTED

input
1000
100
3 4 5 1 4 4 2 3 2 3 4 1 1 1 2 ...
view save

correct output
NO
NO
NO
NO
NO
...
view save

user output
NO
NO
NO
NO
NO
...
Truncated

Test 24

Group: 6, 8

Verdict: ACCEPTED

input
1000
100
5 3 4 3 5 3 3 5 5 4 5 5 5 5 2 ...
view save

correct output
YES
4 4 5 5 2 4 4 5 3 5 5 2 5 5 2 ...
view save

user output
YES
1 5 5 2 4 4 5 5 2 5 3 4 4 5 3 ...
Truncated

Test 25

Group: 8

Verdict: ACCEPTED

input
1000
100
88 70 59 44 28 10 19 19 42 16 ...
view save

correct output
NO
NO
NO
NO
NO
...
view save

user output
NO
NO
NO
NO
NO
...
Truncated

Test 26

Group: 8

Verdict: ACCEPTED

input
1000
100
31 72 52 30 77 56 79 10 88 11 ...
view save

correct output
YES
31 62 14 10 66 63 1 82 37 92 3...
view save

user output
YES
65 67 10 63 88 22 53 17 72 94 ...
Truncated

Test 27

Group: 3, 4, 5, 6, 8

Verdict: ACCEPTED

input
1000
1
1
2
1 1
...
view save

correct output
YES
1 
YES
1 1 
YES
...
view save

user output
YES
1 
YES
1 1 
YES
...
Truncated

Test 28

Group: 8

Verdict: ACCEPTED

input
1000
1
1
2
2 2
...
view save

correct output
YES
1 
YES
2 2 
YES
...
view save

user output
YES
1 
YES
2 2 
YES
...
Truncated

Test 29

Group: 8

Verdict: ACCEPTED

input
1000
100
87 81 29 35 8 98 77 50 46 34 5...
view save

correct output
YES
34 74 25 91 80 18 95 26 88 12 ...
view save

user output
YES
29 65 24 73 95 85 66 85 40 73 ...
Truncated

Test 30

Group: 8

Verdict: ACCEPTED

input
1000
100
65 92 39 22 67 41 17 65 97 71 ...
view save

correct output
YES
9 38 24 59 69 24 63 3 22 35 24...
view save

user output
YES
98 35 41 7 77 52 63 97 38 70 8...
Truncated

Tasks

A Anime Shops-B Chair Game-C Thin Ice-

Submissions (Erik Hedin)

2024-03-17 09:13:18 1002024-03-12 00:35:19 372024-03-12 00:07:39 372024-03-11 09:11:57 322024-03-06 17:29:50 372024-03-06 17:15:18 372024-03-06 16:14:55 172024-03-06 16:13:45 52024-03-06 16:03:41 12