CSES - BOI 2026 Mirror Day 2

Submission details
Task:	Sort
Sender:	MRiekasius
Submission time:	2026-04-17 14:59:43 +0300
Language:	C++ (C++20)
Status:	READY
Result:	0

Feedback
subtask	verdict	score
#1	RUNTIME ERROR	0
#2	WRONG ANSWER	0
#3	RUNTIME ERROR	0
#4	WRONG ANSWER	0
#5	RUNTIME ERROR	0
#6	WRONG ANSWER	0
#7	WRONG ANSWER	0

Test results
test	verdict	time	subtask
#1	WRONG ANSWER	0.00 s	2, 6, 7	details
#2	RUNTIME ERROR	0.00 s	1, 2, 3, 6, 7	details
#3	RUNTIME ERROR	0.00 s	2, 6, 7	details
#4	RUNTIME ERROR	0.00 s	1, 2, 3, 6, 7	details
#5	RUNTIME ERROR	0.00 s	1, 2, 3, 6, 7	details
#6	RUNTIME ERROR	0.00 s	1, 2, 3, 6, 7	details
#7	RUNTIME ERROR	0.00 s	1, 2, 3, 6, 7	details
#8	RUNTIME ERROR	0.00 s	1, 2, 3, 6, 7	details
#9	RUNTIME ERROR	0.00 s	1, 2, 3, 6, 7	details
#10	RUNTIME ERROR	0.00 s	1, 2, 3, 6, 7	details
#11	RUNTIME ERROR	0.00 s	2, 6, 7	details
#12	RUNTIME ERROR	0.00 s	2, 6, 7	details
#13	RUNTIME ERROR	0.00 s	2, 6, 7	details
#14	RUNTIME ERROR	0.00 s	2, 6, 7	details
#15	RUNTIME ERROR	0.00 s	2, 6, 7	details
#16	RUNTIME ERROR	0.03 s	3, 7	details
#17	RUNTIME ERROR	0.03 s	3, 7	details
#18	RUNTIME ERROR	0.03 s	3, 7	details
#19	RUNTIME ERROR	0.03 s	3, 7	details
#20	RUNTIME ERROR	0.03 s	3, 7	details
#21	RUNTIME ERROR	0.03 s	3, 7	details
#22	RUNTIME ERROR	0.03 s	3, 7	details
#23	RUNTIME ERROR	0.03 s	3, 7	details
#24	WRONG ANSWER	0.08 s	4, 7	details
#25	WRONG ANSWER	0.08 s	4, 7	details
#26	WRONG ANSWER	0.08 s	4, 7	details
#27	ACCEPTED	0.03 s	4, 7	details
#28	WRONG ANSWER	0.09 s	4, 7	details
#29	WRONG ANSWER	0.08 s	4, 7	details
#30	RUNTIME ERROR	0.01 s	5, 6, 7	details
#31	RUNTIME ERROR	0.00 s	5, 6, 7	details
#32	RUNTIME ERROR	0.01 s	5, 6, 7	details
#33	RUNTIME ERROR	0.00 s	5, 6, 7	details
#34	RUNTIME ERROR	0.00 s	5, 6, 7	details
#35	RUNTIME ERROR	0.01 s	5, 6, 7	details
#36	RUNTIME ERROR	0.01 s	6, 7	details
#37	RUNTIME ERROR	0.00 s	6, 7	details
#38	RUNTIME ERROR	0.01 s	6, 7	details
#39	RUNTIME ERROR	0.01 s	6, 7	details
#40	RUNTIME ERROR	0.01 s	6, 7	details
#41	RUNTIME ERROR	0.01 s	6, 7	details
#42	RUNTIME ERROR	0.03 s	7	details
#43	RUNTIME ERROR	0.03 s	7	details
#44	RUNTIME ERROR	0.03 s	7	details
#45	RUNTIME ERROR	0.03 s	7	details
#46	RUNTIME ERROR	0.03 s	7	details
#47	RUNTIME ERROR	0.03 s	7	details
#48	RUNTIME ERROR	0.03 s	7	details
#49	RUNTIME ERROR	0.03 s	7	details
#50	RUNTIME ERROR	0.03 s	7	details
#51	RUNTIME ERROR	0.03 s	7	details
#52	WRONG ANSWER	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	WRONG ANSWER	0.00 s	1, 2, 3, 4, 6, 7	details
#56	RUNTIME ERROR	0.00 s	1, 2, 3, 6, 7	details
#57	RUNTIME ERROR	0.00 s	6, 7	details
#58	WRONG ANSWER	0.04 s	3, 4, 7	details
#59	RUNTIME ERROR	0.00 s	3, 7	details
#60	RUNTIME ERROR	0.00 s	2, 6, 7	details
#61	RUNTIME ERROR	0.00 s	2, 6, 7	details
#62	RUNTIME ERROR	0.00 s	2, 6, 7	details
#63	RUNTIME ERROR	0.00 s	2, 6, 7	details
#64	RUNTIME ERROR	0.00 s	2, 6, 7	details

Compiler report

input/code.cpp: In function 'int main()':
input/code.cpp:68:17: warning: unused variable 'ans' [-Wunused-variable]
   68 |             int ans = 0;
      |                 ^~~
input/code.cpp:27:15: warning: unused variable 'pirmoDvejetoX' [-Wunused-variable]
   27 |     const int pirmoDvejetoX = paskutinioVienetoX + 1;
      |               ^~~~~~~~~~~~~

Code

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

int main()
{
    //cout << (long long)INT_MAX - 1000000000LL << endl;
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int n, q;
    cin >> n >> q;
    vector<int> vienetaiIkiX(n + 1, 0), dvejetaiIkiX(n + 1, 0);
    for(int i = 1; i <= n; i++){
        int x;
        cin >> x;
        vienetaiIkiX[i] = vienetaiIkiX[i-1] + 2 - x;
        dvejetaiIkiX[i] = dvejetaiIkiX[i-1] + x - 1;
    }
    /*
    for(auto i: vienetaiIkiX) cout << i << " ";
    cout << "\n";
    for(auto i: dvejetaiIkiX) cout << i << " ";
    cout << "\n";
    //*/
    const int totalVienetai = vienetaiIkiX[n];
    const int totalDvejetai = dvejetaiIkiX[n];
    const int paskutinioVienetoX = totalVienetai - 1;
    const int pirmoDvejetoX = paskutinioVienetoX + 1;
    bool isItSorted = (vienetaiIkiX[totalVienetai] == totalVienetai);
    if(isItSorted){
        while(q--) cout << 0 << "\n";
        return 0;
    }
    while(q--){
        int a, b;
        cin >> a >> b;
        if(a + b <= n){
            if(a > totalVienetai || totalVienetai > n-b){
                //tikrai zinom, kad ne tobulai sorted
                bool doesAContainAll1 = (vienetaiIkiX[a] == totalVienetai);

                if(doesAContainAll1) cout << 1 << "\n";
                else{
                    if(totalVienetai > n - b){
                        cout << 1 << "\n";
                    }
                    else cout << -1;
                }
            }
            else{
                int ans = 0;
                // tikrinam ar pirmiausia a sorted
                bool isATikVienetai  = (vienetaiIkiX[a] == a);
                ans += (int)(!isATikVienetai);
                //tikrinam ar tarpas tinkamas
                int tarpeTuretuButiVienetu = max(min(totalVienetai - a, n - a - b), 0);
                if(vienetaiIkiX[n - b] - vienetaiIkiX[a] != tarpeTuretuButiVienetu){
                    cout << -1;
                    continue;
                }
                int bVienetu = max(totalVienetai - n + b, 0);

                if(totalVienetai - vienetaiIkiX[n - b] != bVienetu) ans++;

                cout << ans << "\n";
            }
        }
        else{
            int ans = 0;
            int tarpoIlgis = a + b - n;
            a -= tarpoIlgis;
            b -= tarpoIlgis;
            const int aTuretuTuretiVienetu = min(a, totalVienetai);
            const int midTuretuTuretiVienetu = max(min(tarpoIlgis, totalVienetai - aTuretuTuretiVienetu), 0);
            const int bTuretuTuretiVienetu = max(0, totalVienetai - aTuretuTuretiVienetu - midTuretuTuretiVienetu);
            int aTuriVienetu = vienetaiIkiX[a];
            int midTuriVienetu = vienetaiIkiX[a + tarpoIlgis] - vienetaiIkiX[a];
            int bTuriVienetu = vienetaiIkiX[b] - midTuriVienetu;

            int bReikiaPokycio = abs(bTuretuTuretiVienetu - bTuriVienetu);
            int bPokyciuiEjimu = bReikiaPokycio/tarpoIlgis;
            if(bReikiaPokycio % tarpoIlgis != 0) bPokyciuiEjimu++;
            bool bSorted = (dvejetaiIkiX[max(n - totalDvejetai, n - b)] == 0);
            if(!bSorted && bPokyciuiEjimu == 0) bPokyciuiEjimu++;


            int aReikiaPokycio = abs(aTuretuTuretiVienetu - aTuriVienetu);
            int aPokyciuiEjimu = aReikiaPokycio/tarpoIlgis;
            if(aReikiaPokycio % tarpoIlgis != 0) aPokyciuiEjimu++;
            bool aSorted = (min(a, totalVienetai) == vienetaiIkiX[max(totalVienetai, a)]);
            if(!aSorted && aPokyciuiEjimu == 0) aPokyciuiEjimu++;

            cout << aPokyciuiEjimu + bPokyciuiEjimu << "\n";

        }
    }
}

Test details

Test 1

Subtask: 2, 6, 7

Verdict: WRONG ANSWER

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
`-1-112` view save

Feedback: Output is shorter than expected

Test 2

Subtask: 1, 2, 3, 6, 7

Verdict: RUNTIME ERROR

input
`2 1 548813503 548813503 1 1` view save

correct output
`0` view save

user output
(empty)

Test 3

Subtask: 2, 6, 7

Verdict: RUNTIME ERROR

input
`1 1 417021999 1 1` view save

correct output
`0` view save

user output
(empty)

Test 4

Subtask: 1, 2, 3, 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 5

Subtask: 1, 2, 3, 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 6

Subtask: 1, 2, 3, 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 7

Subtask: 1, 2, 3, 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 8

Subtask: 1, 2, 3, 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 9

Subtask: 1, 2, 3, 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 10

Subtask: 1, 2, 3, 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 11

Subtask: 2, 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 12

Subtask: 2, 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 13

Subtask: 2, 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 14

Subtask: 2, 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 15

Subtask: 2, 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 16

Subtask: 3, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 17

Subtask: 3, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 18

Subtask: 3, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 19

Subtask: 3, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 20

Subtask: 3, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 21

Subtask: 3, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 22

Subtask: 3, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 23

Subtask: 3, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 24

Subtask: 4, 7

Verdict: WRONG ANSWER

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
`-12 1 0 1 0 ...` view save

Feedback: Output is shorter than expected

Test 25

Subtask: 4, 7

Verdict: WRONG ANSWER

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
`2 -12 -12 2 -13 ...` view save

Feedback: Output is shorter than expected

Test 26

Subtask: 4, 7

Verdict: WRONG ANSWER

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 2 2 2 5 ...` view save

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

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: WRONG ANSWER

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
`4460 575 18849 4881 10284 ...` view save

Feedback: Output is shorter than expected

Test 29

Subtask: 4, 7

Verdict: WRONG ANSWER

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
`91397 86727 31833 49265 33206 ...` view save

Feedback: Output is shorter than expected

Test 30

Subtask: 5, 6, 7

Verdict: RUNTIME ERROR

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
(empty)

Test 31

Subtask: 5, 6, 7

Verdict: RUNTIME ERROR

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
(empty)

Test 32

Subtask: 5, 6, 7

Verdict: RUNTIME ERROR

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
(empty)

Test 33

Subtask: 5, 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 34

Subtask: 5, 6, 7

Verdict: RUNTIME ERROR

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
(empty)

Test 35

Subtask: 5, 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 36

Subtask: 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 37

Subtask: 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 38

Subtask: 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 39

Subtask: 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 40

Subtask: 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 41

Subtask: 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 42

Subtask: 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 43

Subtask: 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 44

Subtask: 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 45

Subtask: 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 46

Subtask: 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 47

Subtask: 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 48

Subtask: 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 49

Subtask: 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 50

Subtask: 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 51

Subtask: 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 52

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

Verdict: WRONG ANSWER

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

Feedback: Incorrect character on line 1 col 1: expected "2", got "5"

Test 55

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

Verdict: WRONG ANSWER

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
`-11 1 -11 1 2 ...` view save

Feedback: Output is shorter than expected

Test 56

Subtask: 1, 2, 3, 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 57

Subtask: 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 58

Subtask: 3, 4, 7

Verdict: WRONG ANSWER

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
`-11 -1-1-1-1-1-11 -1-1-11 1 -11 ...` view save

Feedback: Output is shorter than expected

Test 59

Subtask: 3, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 60

Subtask: 2, 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 61

Subtask: 2, 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 62

Subtask: 2, 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 63

Subtask: 2, 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

Test 64

Subtask: 2, 6, 7

Verdict: RUNTIME ERROR

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

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

user output
(empty)

BOI 2026 Mirror Day 2

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Compiler report

Code

Test details

Test 1

Test 2

Test 3

Test 4

Test 5

Test 6

Test 7

Test 8

Test 9

Test 10

Test 11

Test 12

Test 13

Test 14

Test 15

Test 16

Test 17

Test 18

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Test 20

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Test 40

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Test 45

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Test 50

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Test 63

Test 64

Tasks

Submissions (MRiekasius)