CSES - BOI 2026 Mirror Day 2

Submission details
Task:	Sort
Sender:	Sebastian
Submission time:	2026-04-17 10:00:27 +0300
Language:	C++ (C++20)
Status:	READY
Result:	27

Feedback
subtask	verdict	score
#1	ACCEPTED	6
#2	WRONG ANSWER	0
#3	ACCEPTED	7
#4	ACCEPTED	14
#5	WRONG ANSWER	0
#6	WRONG ANSWER	0
#7	WRONG ANSWER	0

Test results
test	verdict	time	subtask
#1	ACCEPTED	0.00 s	2, 6, 7	details
#2	ACCEPTED	0.00 s	1, 2, 3, 6, 7	details
#3	ACCEPTED	0.00 s	2, 6, 7	details
#4	ACCEPTED	0.00 s	1, 2, 3, 6, 7	details
#5	ACCEPTED	0.00 s	1, 2, 3, 6, 7	details
#6	ACCEPTED	0.00 s	1, 2, 3, 6, 7	details
#7	ACCEPTED	0.00 s	1, 2, 3, 6, 7	details
#8	ACCEPTED	0.00 s	1, 2, 3, 6, 7	details
#9	ACCEPTED	0.00 s	1, 2, 3, 6, 7	details
#10	ACCEPTED	0.00 s	1, 2, 3, 6, 7	details
#11	ACCEPTED	0.00 s	2, 6, 7	details
#12	ACCEPTED	0.00 s	2, 6, 7	details
#13	ACCEPTED	0.00 s	2, 6, 7	details
#14	ACCEPTED	0.00 s	2, 6, 7	details
#15	ACCEPTED	0.00 s	2, 6, 7	details
#16	ACCEPTED	0.49 s	3, 7	details
#17	ACCEPTED	0.53 s	3, 7	details
#18	ACCEPTED	0.51 s	3, 7	details
#19	ACCEPTED	0.54 s	3, 7	details
#20	ACCEPTED	0.49 s	3, 7	details
#21	ACCEPTED	0.49 s	3, 7	details
#22	ACCEPTED	0.50 s	3, 7	details
#23	ACCEPTED	0.64 s	3, 7	details
#24	ACCEPTED	0.52 s	4, 7	details
#25	ACCEPTED	0.54 s	4, 7	details
#26	ACCEPTED	0.59 s	4, 7	details
#27	ACCEPTED	0.50 s	4, 7	details
#28	ACCEPTED	0.50 s	4, 7	details
#29	ACCEPTED	0.46 s	4, 7	details
#30	WRONG ANSWER	0.01 s	5, 6, 7	details
#31	WRONG ANSWER	0.01 s	5, 6, 7	details
#32	WRONG ANSWER	0.01 s	5, 6, 7	details
#33	ACCEPTED	0.02 s	5, 6, 7	details
#34	ACCEPTED	0.01 s	5, 6, 7	details
#35	ACCEPTED	0.01 s	5, 6, 7	details
#36	WRONG ANSWER	0.01 s	6, 7	details
#37	WRONG ANSWER	0.01 s	6, 7	details
#38	ACCEPTED	0.02 s	6, 7	details
#39	ACCEPTED	0.02 s	6, 7	details
#40	ACCEPTED	0.01 s	6, 7	details
#41	ACCEPTED	0.01 s	6, 7	details
#42	WRONG ANSWER	0.55 s	7	details
#43	WRONG ANSWER	0.55 s	7	details
#44	WRONG ANSWER	0.56 s	7	details
#45	ACCEPTED	0.61 s	7	details
#46	ACCEPTED	0.64 s	7	details
#47	ACCEPTED	0.65 s	7	details
#48	ACCEPTED	0.65 s	7	details
#49	ACCEPTED	0.51 s	7	details
#50	ACCEPTED	0.52 s	7	details
#51	ACCEPTED	0.47 s	7	details
#52	ACCEPTED	0.00 s	1, 2, 3, 5, 6, 7	details
#53	ACCEPTED	0.00 s	1, 2, 3, 4, 5, 6, 7	details
#54	WRONG ANSWER	0.00 s	2, 5, 6, 7	details
#55	ACCEPTED	0.00 s	1, 2, 3, 4, 6, 7	details
#56	ACCEPTED	0.00 s	1, 2, 3, 6, 7	details
#57	ACCEPTED	0.00 s	6, 7	details
#58	ACCEPTED	0.09 s	3, 4, 7	details
#59	ACCEPTED	0.09 s	3, 7	details
#60	WRONG ANSWER	0.00 s	2, 6, 7	details
#61	WRONG ANSWER	0.00 s	2, 6, 7	details
#62	WRONG ANSWER	0.00 s	2, 6, 7	details
#63	WRONG ANSWER	0.00 s	2, 6, 7	details
#64	WRONG ANSWER	0.00 s	2, 6, 7	details

Code

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pll;
typedef __int128_t i128;
#define all(x) begin(x), end(x)
#define sz(x) ((int)(x).size())
const ll inf = 4e18;

struct event {
    ll t, l, r;
    ll *p;
    
    event(ll t, ll l, ll r, ll *p) : t(t), l(l), r(r), p(p) {}

    bool operator<(const event &o) const {
        return t < o.t;
    }
};

struct segtree {
    ll nt = 0;
    vector<ll> tree;

    segtree(ll n) {
        nt = 1;
        while (nt < n) nt *= 2;
        tree = vector<ll>(2*nt);
    }

    void point_set(ll i, ll v) { return point_set(1, 0, nt-1, i, v); }
    void point_set(ll k, ll tl, ll tr, ll i, ll v) {
        if (tl == tr) return tree[k] = v, void();
        ll mid = tl + (tr - tl) / 2;
        if (i <= mid) point_set(2*k, tl, mid, i, v);
        else point_set(2*k+1, mid+1, tr, i, v);
        tree[k] = tree[2*k] + tree[2*k+1];
    }

    ll range_sum(ll l, ll r) { return range_sum(1, 0, nt-1, l, r); }
    ll range_sum(ll k, ll tl, ll tr, ll l, ll r) {
        if (r < tl || l > tr) return 0;
        if (l <= tl && r >= tr) return tree[k];
        ll mid = tl + (tr - tl) / 2;
        return range_sum(2*k, tl, mid, l, r) + range_sum(2*k+1, mid+1, tr, l, r);
    }
};

void solve() {
    ll n, q; cin >> n >> q;
    vector<ll> aa(n);
    vector<pll> srt(n);
    for (ll i = 0; i < n; i++) {
        cin >> aa[i];
        srt[i] = pll(aa[i], i);
    }
    sort(all(srt));
    for (ll i = 0; i < n; i++) {
        aa[i] = lower_bound(all(srt), pll(aa[i], i)) - srt.begin();
    }

    vector<ll> qa(q), qb(q), bluel(q), bluer(q), purplel(q), purpler(q);
    vector<event> events;
    for (ll i = 0; i < q; i++) {
        cin >> qa[i] >> qb[i];
        ll fp = qa[i];
        ll fr = n - qb[i];
        if (fp > fr) swap(fp, fr);
        events.emplace_back(fp, 0, fp-1, &bluel[i]);
        events.emplace_back(fr, 0, fp-1, &purplel[i]);
        events.emplace_back(fp, fr, n-1, &bluer[i]);
        events.emplace_back(fr, fr, n-1, &purpler[i]);
    }
    sort(all(events));

    segtree is_sorted(n);
    for (ll i = 0; i < n; i++) {
        is_sorted.point_set(i, aa[i] == i);
    }

    ll curt = 0;
    segtree tree(n);
    for (auto &[t, l, r, p] : events) {
        while (curt < t) {
            tree.point_set(srt[curt].second, 1);
            curt++;
        }
        *p = tree.range_sum(l, r);
    }

    // --------

    for (ll i = 0; i < q; i++) {
        ll a = qa[i], b = qb[i];
        ll lb = bluel[i], lp = purplel[i] - lb;
        ll rb = bluer[i], rp = purpler[i] - rb;
        ll fp = qa[i];
        ll fr = n - qb[i];
        if (fp > fr) swap(fp, fr);
        ll lr = fp - lb - lp, rr = (n - fr) - rb - rp;
        ll mb = fp - lb - rb, mr = (n - fr) - lr - rr;
        ll mp = n - lb - lp - lr - mb - mr - rb - rp - rr;
        if (a + b <= n) {
            bool bad = lb < a || rr < b || is_sorted.range_sum(fp, fr-1) < fr - fp;
            if (bad) cout << "-1\n";
            else {
                ll cnt = (is_sorted.range_sum(0, fp-1) < fp) + (is_sorted.range_sum(fr, n-1) < n - fr);
                cout << cnt << '\n';
            }
            continue;
        }
        if (is_sorted.range_sum(0, n-1) == n) {
            cout << "0\n";
            continue;
        }
        if (is_sorted.range_sum(0, fp-1) == fp || is_sorted.range_sum(fr, n-1) == n - fr) {
            cout << "1\n";
            continue;
        }

        // a + b > n

        ll res = inf;
        {
            ll non_blue = lp + lr + mp + mr - (fr - fp);
            ll non_red = rb + rp;
            if (non_blue < 0) non_blue = 0;
            if (non_red < 0) non_red = 0;
            ll cand = 1 + (non_blue + (fr - fp) - 1) / (fr - fp) + (non_red + (fr - fp) - 1) / (fr - fp);
            res = min(res, cand);
        }
        {
            ll non_blue = lp + lr;
            ll non_red = rb + rp + mb + mp - (fr - fp);
            if (non_blue < 0) non_blue = 0;
            if (non_red < 0) non_red = 0;
            ll cand = 1 + (non_blue + (fr - fp) - 1) / (fr - fp) + (non_red + (fr - fp) - 1) / (fr - fp);
            res = min(res, cand);
        }
        cout << res << '\n';
    }
}

int main() {
    cin.tie(0)->sync_with_stdio(0);
    solve();
}

Test details

Test 1

Subtask: 2, 6, 7

Verdict: ACCEPTED

input
`6 3 3 1 4 1 5 9 4 1 3 3 2 5` view save

correct output
`1 -1 2` view save

user output
`1 -1 2` view save

Test 2

Subtask: 1, 2, 3, 6, 7

Verdict: ACCEPTED

input
`2 1 548813503 548813503 1 1` view save

correct output
`0` view save

user output
`0` view save

Test 3

Subtask: 2, 6, 7

Verdict: ACCEPTED

input
`1 1 417021999 1 1` view save

correct output
`0` view save

user output
`0` view save

Test 4

Subtask: 1, 2, 3, 6, 7

Verdict: ACCEPTED

input
`10 10 20751947 20751947 20751947 494...` view save

correct output
`-1 -1 1 1 -1 ...` view save

user output
`-1 -1 1 1 -1 ...` view save

Test 5

Subtask: 1, 2, 3, 6, 7

Verdict: ACCEPTED

input
`10 10 12780811 19475241 19475241 683...` view save

correct output
`0 0 0 0 0 ...` view save

user output
`0 0 0 0 0 ...` view save

Test 6

Subtask: 1, 2, 3, 6, 7

Verdict: ACCEPTED

input
`10 10 14574963 14574963 14574963 864...` view save

correct output
`0 0 0 0 0 ...` view save

user output
`0 0 0 0 0 ...` view save

Test 7

Subtask: 1, 2, 3, 6, 7

Verdict: ACCEPTED

input
`10 10 237541216 237541216 35036522 6...` view save

correct output
`-1 -1 -1 2 -1 ...` view save

user output
`-1 -1 -1 2 -1 ...` view save

Test 8

Subtask: 1, 2, 3, 6, 7

Verdict: ACCEPTED

input
`10 10 319425549 513116712 539199939 ...` view save

correct output
`-1 -1 -1 -1 -1 ...` view save

user output
`-1 -1 -1 -1 -1 ...` view save

Test 9

Subtask: 1, 2, 3, 6, 7

Verdict: ACCEPTED

input
`10 10 54363219 54363219 110986323 11...` view save

correct output
`0 0 0 0 0 ...` view save

user output
`0 0 0 0 0 ...` view save

Test 10

Subtask: 1, 2, 3, 6, 7

Verdict: ACCEPTED

input
`10 5 55687086 550701455 326656159 5...` view save

correct output
`-1 -1 -1 -1 -1` view save

user output
`-1 -1 -1 -1 -1` view save

Test 11

Subtask: 2, 6, 7

Verdict: ACCEPTED

input
`10 10 35889584 588130796 815837475 8...` view save

correct output
`-1 -1 1 1 1 ...` view save

user output
`-1 -1 1 1 1 ...` view save

Test 12

Subtask: 2, 6, 7

Verdict: ACCEPTED

input
`10 10 679842175 48724877 720966351 6...` view save

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

user output
`2 3 2 1 1 ...` view save

Test 13

Subtask: 2, 6, 7

Verdict: ACCEPTED

input
`10 10 893310183 811950921 338863962 ...` view save

correct output
`2 1 1 2 5 ...` view save

user output
`2 1 1 2 5 ...` view save

Test 14

Subtask: 2, 6, 7

Verdict: ACCEPTED

input
`10 10 221045363 282395847 441913686 ...` view save

correct output
`0 0 0 0 0 ...` view save

user output
`0 0 0 0 0 ...` view save

Test 15

Subtask: 2, 6, 7

Verdict: ACCEPTED

input
`10 10 509019662 983949268 960017302 ...` view save

correct output
`3 -1 3 3 3 ...` view save

user output
`3 -1 3 3 3 ...` view save

Test 16

Subtask: 3, 7

Verdict: ACCEPTED

input
`200000 200000 2277053 2277053 2277053 227705...` view save

correct output
`-1 -1 -1 -1 -1 ...` view save

user output
`-1 -1 -1 -1 -1 ...` view save

Test 17

Subtask: 3, 7

Verdict: ACCEPTED

input
`200000 200000 6767 16596 16596 27202 37272 4...` view save

correct output
`-1 -1 -1 -1 -1 ...` view save

user output
`-1 -1 -1 -1 -1 ...` view save

Test 18

Subtask: 3, 7

Verdict: ACCEPTED

input
`200000 200000 5393 5910 9099 15755 15755 164...` view save

correct output
`-1 -1 -1 -1 -1 ...` view save

user output
`-1 -1 -1 -1 -1 ...` view save

Test 19

Subtask: 3, 7

Verdict: ACCEPTED

input
`200000 200000 3779 4629 8999 10468 22605 227...` view save

correct output
`-1 1 2 -1 -1 ...` view save

user output
`-1 1 2 -1 -1 ...` view save

Test 20

Subtask: 3, 7

Verdict: ACCEPTED

input
`200000 200000 878 2791 10849 11861 13405 239...` view save

correct output
`-1 -1 -1 -1 -1 ...` view save

user output
`-1 -1 -1 -1 -1 ...` view save

Test 21

Subtask: 3, 7

Verdict: ACCEPTED

input
`200000 200000 430 1479 1992 2829 7152 14093 ...` view save

correct output
`-1 -1 -1 -1 -1 ...` view save

user output
`-1 -1 -1 -1 -1 ...` view save

Test 22

Subtask: 3, 7

Verdict: ACCEPTED

input
`199997 200000 2733 10526 13882 14035 14689 3...` view save

correct output
`-1 -1 -1 -1 -1 ...` view save

user output
`-1 -1 -1 -1 -1 ...` view save

Test 23

Subtask: 3, 7

Verdict: ACCEPTED

input
`200000 200000 12345 13538 15407 18490 18984 ...` view save

correct output
`0 0 0 0 0 ...` view save

user output
`0 0 0 0 0 ...` view save

Test 24

Subtask: 4, 7

Verdict: ACCEPTED

input
`200000 200000 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...` view save

correct output
`-1 1 -1 -1 -1 ...` view save

user output
`-1 1 -1 -1 -1 ...` view save

Test 25

Subtask: 4, 7

Verdict: ACCEPTED

input
`200000 200000 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...` view save

correct output
`1 -1 1 -1 1 ...` view save

user output
`1 -1 1 -1 1 ...` view save

Test 26

Subtask: 4, 7

Verdict: ACCEPTED

input
`200000 200000 2 2 1 1 2 1 2 1 2 2 2 1 1 1 2 ...` view save

correct output
`4 3 2 2 6 ...` view save

user output
`4 3 2 2 6 ...` view save

Test 27

Subtask: 4, 7

Verdict: ACCEPTED

input
`200000 200000 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...` view save

correct output
`0 0 0 0 0 ...` view save

user output
`0 0 0 0 0 ...` view save

Test 28

Subtask: 4, 7

Verdict: ACCEPTED

input
`200000 200000 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 ...` view save

correct output
`8513 1099 35939 9299 19597 ...` view save

user output
`8513 1099 35939 9299 19597 ...` view save

Test 29

Subtask: 4, 7

Verdict: ACCEPTED

input
`200000 200000 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 ...` view save

correct output
`178345 169257 62115 96143 64796 ...` view save

user output
`178345 169257 62115 96143 64796 ...` view save

Test 30

Subtask: 5, 6, 7

Verdict: WRONG ANSWER

input
`5000 5000 1 2 3 4 5 6 7 8 9 10 11 12 13 ...` view save

correct output
`1 1 -1 1 -1 ...` view save

user output
`1 1 -1 1 -1 ...` view save

Feedback: Incorrect character on line 12 col 1: expected "2", got "1"

Test 31

Subtask: 5, 6, 7

Verdict: WRONG ANSWER

input
`5000 5000 1 2 3 4 5 6 7 8 9 72 145 47 19...` view save

correct output
`-1 2 -1 2 -1 ...` view save

user output
`-1 1 -1 1 -1 ...` view save

Feedback: Incorrect character on line 2 col 1: expected "2", got "1"

Test 32

Subtask: 5, 6, 7

Verdict: WRONG ANSWER

input
`4999 5000 1 2 3 4 5 6 7 8 9 10 11 12 13 ...` view save

correct output
`-1 2 -1 -1 -1 ...` view save

user output
`-1 2 -1 -1 -1 ...` view save

Feedback: Incorrect character on line 7 col 1: expected "2", got "1"

Test 33

Subtask: 5, 6, 7

Verdict: ACCEPTED

input
`5000 5000 4033 4368 3086 3208 4313 388 8...` view save

correct output
`3 3 3 3 11 ...` view save

user output
`3 3 3 3 11 ...` view save

Test 34

Subtask: 5, 6, 7

Verdict: ACCEPTED

input
`5000 5000 1 2 3 4 5 6 7 8 9 10 11 12 13 ...` view save

correct output
`0 0 0 0 0 ...` view save

user output
`0 0 0 0 0 ...` view save

Test 35

Subtask: 5, 6, 7

Verdict: ACCEPTED

input
`5000 5000 5000 4999 4998 4997 4996 4995 ...` view save

correct output
`2039 1910 -1 687 673 ...` view save

user output
`2039 1910 -1 687 673 ...` view save

Test 36

Subtask: 6, 7

Verdict: WRONG ANSWER

input
`5000 5000 202010 457852 826471 926337 10...` view save

correct output
`-1 -1 2 -1 -1 ...` view save

user output
`-1 -1 2 -1 -1 ...` view save

Feedback: Incorrect character on line 28 col 1: expected "2", got "1"

Test 37

Subtask: 6, 7

Verdict: WRONG ANSWER

input
`5000 5000 190583 326486 431922 462939 72...` view save

correct output
`-1 -1 -1 -1 2 ...` view save

user output
`-1 -1 -1 -1 2 ...` view save

Feedback: Incorrect character on line 8 col 1: expected "2", got "1"

Test 38

Subtask: 6, 7

Verdict: ACCEPTED

input
`5000 5000 821998255 400550008 71790232 5...` view save

correct output
`5 3 3 2 5 ...` view save

user output
`5 3 3 2 5 ...` view save

Test 39

Subtask: 6, 7

Verdict: ACCEPTED

input
`5000 5000 266174928 446601941 191252234 ...` view save

correct output
`3 3 414 4 3 ...` view save

user output
`3 3 414 4 3 ...` view save

Test 40

Subtask: 6, 7

Verdict: ACCEPTED

input
`5000 5000 11621 243915 243915 949123 137...` view save

correct output
`0 0 0 0 0 ...` view save

user output
`0 0 0 0 0 ...` view save

Test 41

Subtask: 6, 7

Verdict: ACCEPTED

input
`5000 5000 999767052 998555066 997822810 ...` view save

correct output
`919 459 505 833 809 ...` view save

user output
`919 459 505 833 809 ...` view save

Test 42

Subtask: 7

Verdict: WRONG ANSWER

input
`200000 200000 478025 478025 478025 478025 47...` view save

correct output
`-1 -1 2 2 2 ...` view save

user output
`-1 -1 1 1 1 ...` view save

Feedback: Incorrect character on line 3 col 1: expected "2", got "1"

Test 43

Subtask: 7

Verdict: WRONG ANSWER

input
`200000 200000 1810 2088 3022 3097 7459 7943 ...` view save

correct output
`2 -1 -1 2 -1 ...` view save

user output
`2 -1 -1 1 -1 ...` view save

Feedback: Incorrect character on line 4 col 1: expected "2", got "1"

Test 44

Subtask: 7

Verdict: WRONG ANSWER

input
`199531 200000 11328 26391 30353 37063 44412 ...` view save

correct output
`-1 2 -1 2 2 ...` view save

user output
`-1 1 -1 1 1 ...` view save

Feedback: Incorrect character on line 2 col 1: expected "2", got "1"

Test 45

Subtask: 7

Verdict: ACCEPTED

input
`200000 200000 106738201 369187074 412614650 ...` view save

correct output
`2 12 3 19 3 ...` view save

user output
`2 12 3 19 3 ...` view save

Test 46

Subtask: 7

Verdict: ACCEPTED

input
`200000 200000 670611290 43427363 8475380 309...` view save

correct output
`3 5 3 3 3 ...` view save

user output
`3 5 3 3 3 ...` view save

Test 47

Subtask: 7

Verdict: ACCEPTED

input
`200000 200000 907542569 504758282 948727805 ...` view save

correct output
`3 33 3 3 3 ...` view save

user output
`3 33 3 3 3 ...` view save

Test 48

Subtask: 7

Verdict: ACCEPTED

input
`200000 200000 487056731 460461648 142698485 ...` view save

correct output
`3 3 3 3 3 ...` view save

user output
`3 3 3 3 3 ...` view save

Test 49

Subtask: 7

Verdict: ACCEPTED

input
`200000 200000 12772 23236 23236 23236 41149 ...` view save

correct output
`0 0 0 0 0 ...` view save

user output
`0 0 0 0 0 ...` view save

Test 50

Subtask: 7

Verdict: ACCEPTED

input
`200000 200000 999993539 999993361 999993361 ...` view save

correct output
`125375 16687 -1 84781 46147 ...` view save

user output
`125375 16687 -1 84781 46147 ...` view save

Test 51

Subtask: 7

Verdict: ACCEPTED

input
`200000 200000 999993539 999993361 999993361 ...` view save

correct output
`94788 177608 95881 56377 179957 ...` view save

user output
`94788 177608 95881 56377 179957 ...` view save

Test 52

Subtask: 1, 2, 3, 5, 6, 7

Verdict: ACCEPTED

input
`5 1 2 1 3 5 4 2 2` view save

correct output
`2` view save

user output
`2` view save

Test 53

Subtask: 1, 2, 3, 4, 5, 6, 7

Verdict: ACCEPTED

input
`2 1 1 2 1 1` view save

correct output
`0` view save

user output
`0` view save

Test 54

Subtask: 2, 5, 6, 7

Verdict: WRONG ANSWER

input
`4 1 2 1 4 3 3 2` view save

correct output
`2` view save

user output
`1` view save

Feedback: Incorrect character on line 1 col 1: expected "2", got "1"

Test 55

Subtask: 1, 2, 3, 4, 6, 7

Verdict: ACCEPTED

input
`10 10 1 1 1 1 2 2 1 1 2 2 7 1 2 6 4 5 ...` view save

correct output
`-1 1 -1 -1 -1 ...` view save

user output
`-1 1 -1 -1 -1 ...` view save

Test 56

Subtask: 1, 2, 3, 6, 7

Verdict: ACCEPTED

input
`10 10 181777772 181777772 181777772 ...` view save

correct output
`-1 -1 -1 -1 -1 ...` view save

user output
`-1 -1 -1 -1 -1 ...` view save

Test 57

Subtask: 6, 7

Verdict: ACCEPTED

input
`100 10 92800811 524548163 939127795 9...` view save

correct output
`-1 -1 3 -1 3 ...` view save

user output
`-1 -1 3 -1 3 ...` view save

Test 58

Subtask: 3, 4, 7

Verdict: ACCEPTED

input
`100 100000 2 2 2 1 2 2 2 2 1 2 1 1 1 2 2 ...` view save

correct output
`-1 -1 -1 -1 -1 ...` view save

user output
`-1 -1 -1 -1 -1 ...` view save

Test 59

Subtask: 3, 7

Verdict: ACCEPTED

input
`100 100000 172695325 172695325 172695325 ...` view save

correct output
`-1 -1 -1 -1 -1 ...` view save

user output
`-1 -1 -1 -1 -1 ...` view save

Test 60

Subtask: 2, 6, 7

Verdict: WRONG ANSWER

input
`4 10 869194539 239439572 968540665 ...` view save

correct output
`-1 2 -1 -1 -1 ...` view save

user output
`-1 1 -1 -1 -1 ...` view save

Feedback: Incorrect character on line 2 col 1: expected "2", got "1"

Test 61

Subtask: 2, 6, 7

Verdict: WRONG ANSWER

input
`10 10 55366041 112170735 112170735 5...` view save

correct output
`-1 -1 2 1 1 ...` view save

user output
`-1 -1 2 1 1 ...` view save

Feedback: Incorrect character on line 8 col 1: expected "2", got "1"

Test 62

Subtask: 2, 6, 7

Verdict: WRONG ANSWER

input
`10 10 156018639 156018639 445832758 ...` view save

correct output
`-1 1 -1 -1 2 ...` view save

user output
`-1 1 -1 -1 2 ...` view save

Feedback: Incorrect character on line 10 col 1: expected "2", got "1"

Test 63

Subtask: 2, 6, 7

Verdict: WRONG ANSWER

input
`10 10 702507512 702507512 892090406 ...` view save

correct output
`-1 2 -1 2 2 ...` view save

user output
`-1 2 -1 1 2 ...` view save

Feedback: Incorrect character on line 4 col 1: expected "2", got "1"

Test 64

Subtask: 2, 6, 7

Verdict: WRONG ANSWER

input
`10 10 720324490 720324490 720324490 ...` view save

correct output
`-1 2 2 1 -1 ...` view save

user output
`-1 1 2 1 -1 ...` view save

Feedback: Incorrect character on line 2 col 1: expected "2", got "1"

BOI 2026 Mirror Day 2

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