CSES - BOI 2026 Mirror Day 2

Submission details
Task:	Sort
Sender:	frederikvase
Submission time:	2026-04-17 13:47:15 +0300
Language:	C++ (C++20)
Status:	READY
Result:	100

Feedback
subtask	verdict	score
#1	ACCEPTED	6
#2	ACCEPTED	5
#3	ACCEPTED	7
#4	ACCEPTED	14
#5	ACCEPTED	23
#6	ACCEPTED	12
#7	ACCEPTED	33

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	0.27 s	3, 7	details
#17	ACCEPTED	0.40 s	3, 7	details
#18	ACCEPTED	0.44 s	3, 7	details
#19	ACCEPTED	0.41 s	3, 7	details
#20	ACCEPTED	0.42 s	3, 7	details
#21	ACCEPTED	0.39 s	3, 7	details
#22	ACCEPTED	0.42 s	3, 7	details
#23	ACCEPTED	0.39 s	3, 7	details
#24	ACCEPTED	0.32 s	4, 7	details
#25	ACCEPTED	0.31 s	4, 7	details
#26	ACCEPTED	0.41 s	4, 7	details
#27	ACCEPTED	0.33 s	4, 7	details
#28	ACCEPTED	0.34 s	4, 7	details
#29	ACCEPTED	0.32 s	4, 7	details
#30	ACCEPTED	0.01 s	5, 6, 7	details
#31	ACCEPTED	0.01 s	5, 6, 7	details
#32	ACCEPTED	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	ACCEPTED	0.01 s	6, 7	details
#37	ACCEPTED	0.01 s	6, 7	details
#38	ACCEPTED	0.01 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	ACCEPTED	0.34 s	7	details
#43	ACCEPTED	0.49 s	7	details
#44	ACCEPTED	0.47 s	7	details
#45	ACCEPTED	0.45 s	7	details
#46	ACCEPTED	0.47 s	7	details
#47	ACCEPTED	0.48 s	7	details
#48	ACCEPTED	0.78 s	7	details
#49	ACCEPTED	0.45 s	7	details
#50	ACCEPTED	0.50 s	7	details
#51	ACCEPTED	0.45 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	ACCEPTED	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	0.05 s	3, 4, 7	details
#59	ACCEPTED	0.05 s	3, 7	details
#60	ACCEPTED	0.00 s	2, 6, 7	details
#61	ACCEPTED	0.00 s	2, 6, 7	details
#62	ACCEPTED	0.00 s	2, 6, 7	details
#63	ACCEPTED	0.00 s	2, 6, 7	details
#64	ACCEPTED	0.00 s	2, 6, 7	details

Code

#include <bits/stdc++.h>
using namespace std;
using ll = long long;

struct segtree {
	vector<int> tree;
	int nt = 1;

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

	void set(int i) {
		i += nt;
		tree[i] = 1;
		for (i /= 2; i >= 1; i /= 2) {
			tree[i] = tree[i * 2] + tree[i * 2 | 1];
		}
	}

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

struct querya {
	int i;
	int a, b;
	querya() {}
	querya(int i_, int a_, int b_) : i(i_), a(a_), b(b_) {}
	bool operator<(const querya& other) {
		return a < other.a;
	}
};
struct queryb {
	int i;
	int a, b;
	queryb() {}
	queryb(int i_, int a_, int b_) : i(i_), a(a_), b(b_) {}
	bool operator<(const queryb& other) {
		return b < other.b;
	}
};

void imp() {
	cout << "-1\n";
}

signed main() {
	cin.tie(0)->sync_with_stdio(0);
	ll n, q;
	cin >> n >> q;

	vector<ll> x(n);
	set<ll> values;
	for (ll &e : x) cin >> e, values.insert(e);
	int mxel = 0;
	{
		map<ll, ll> mp;
		for (ll e : values) {
			mp[e] = mxel++;
		}
		for (ll &e : x) e = mp[e];
	}
	vector<pair<ll, int>> add;
	for (int i = 0; i < n; i++) {
		add.emplace_back(x[i], i);
	}
	sort(begin(add), end(add));

	vector<ll> sorted = x;
	sort(begin(sorted), end(sorted));

	vector<ll> prefixinplace(n + 1);
	for (ll i = 0; i < n; i++) {
		prefixinplace[i + 1] = prefixinplace[i] + ll(x[i] == sorted[i]);
	}

	vector<ll> prefixmax(n), suffixmin(n);
	prefixmax[0] = x[0];
	for (ll i = 1; i < n; i++) {
		prefixmax[i] = max(x[i], prefixmax[i - 1]);
	}
	suffixmin[n - 1] = x[n - 1];
	for (ll i = n - 1; i--; ) {
		suffixmin[i] = min(x[i], suffixmin[i + 1]);
	}

	vector<querya> qas;
	vector<queryb> qbs;
	vector<pair<int, int>> queries(q);
	for (int qq = 0; qq < q; qq++) {
		ll a, b;
		cin >> a >> b;
		queries[qq] = {a, b};
		qas.emplace_back(qq, a, b);
		qbs.emplace_back(qq, a, b);
	}
	sort(begin(qas), end(qas));
	reverse(begin(qas), end(qas));

	segtree treea(n);
	vector<ll> ba(q), bb(q), bam(q), bbm(q);
	for (int i = 1; i <= n; i++) {
		treea.set(add[i - 1].second);
		while (!qas.empty() && qas.back().a == i) {
			auto [qq, a, b] = qas.back();
			qas.pop_back();

			ba[qq] = a - treea.query(0, a - 1);
			bam[qq] = a + b - n - treea.query(n - b, a - 1);
		}
	}

	sort(begin(qbs), end(qbs));
	reverse(begin(qbs), end(qbs));
	segtree treeb(n);
	for (int i = 1; i <= n; i++) {
		treeb.set(add[n - i].second);
		while (!qbs.empty() && qbs.back().b == i) {
			auto [qq, a, b] = qbs.back();
			qbs.pop_back();

			bb[qq] = b - treeb.query(n - b, n - 1);
			bbm[qq] = a + b - n - treeb.query(n - b, a - 1);
		}
	}

	for (int qq = 0; qq < q; qq++) {
		auto [a, b] = queries[qq];

		if (prefixinplace[n] == n) {
			cout << "0\n";
			continue;
		} else if (a == n || b == n) {
			cout << "1\n";
			continue;
		}

		if (a + b <= n) {
			if (prefixinplace[n - b] - prefixinplace[a] != n - b - a || 
					prefixmax[a - 1] > suffixmin[n - b]) {
				imp();
				continue;
			}

			ll res = 2;
			if (prefixinplace[a] == a) res--;
			if (prefixinplace[n] - prefixinplace[n - b] == b) res--;
			cout << res << "\n";

			continue;
		}

		if (prefixinplace[n] - prefixinplace[a] == n - a ||
			prefixinplace[n - b] == n - b) {
			cout << "1\n";
			continue;
		}

		// Answer is at least 2
		ll overlap = a + b - n;
		auto Sol = [](ll overlap, ll ba, ll bb, ll bam, ll bbm) -> ll {
			bb -= bbm;
			ba -= overlap;
			if (max(ba, bb) <= 0) return 2;
			ll lo = 1, hi = 5e5;
			while (lo < hi) {
				ll mid = lo + (hi - lo) / 2;
				ll nbb = bb - overlap * ((mid + 1) / 2);
				ll nba = ba - overlap * (mid / 2);
				if (max(nbb, nba) <= 0) {
					hi = mid;
				} else {
					lo = mid + 1;
				}
			}
			return 2 + lo;
		};

		//cout << ba[qq] << " " << bb[qq] << " " << bam[qq] << " " << bbm[qq] << "\n";
		ll res = min(Sol(overlap, ba[qq], bb[qq], bam[qq], bbm[qq]), 
					 Sol(overlap, bb[qq], ba[qq], bbm[qq], bam[qq]));
		cout << res << "\n";
	}
}

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: ACCEPTED

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

Test 31

Subtask: 5, 6, 7

Verdict: ACCEPTED

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 2 -1 2 -1 ...` view save

Test 32

Subtask: 5, 6, 7

Verdict: ACCEPTED

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

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: ACCEPTED

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

Test 37

Subtask: 6, 7

Verdict: ACCEPTED

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

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: ACCEPTED

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

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

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

Test 43

Subtask: 7

Verdict: ACCEPTED

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 2 -1 ...` view save

Test 44

Subtask: 7

Verdict: ACCEPTED

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

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

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

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: ACCEPTED

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

correct output
`2` view save

user output
`2` view save

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: ACCEPTED

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

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

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

Test 61

Subtask: 2, 6, 7

Verdict: ACCEPTED

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

Test 62

Subtask: 2, 6, 7

Verdict: ACCEPTED

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

Test 63

Subtask: 2, 6, 7

Verdict: ACCEPTED

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

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

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

Test 64

Subtask: 2, 6, 7

Verdict: ACCEPTED

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

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

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

BOI 2026 Mirror Day 2

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