CSES - Datatähti 2025 loppu

Submission details
Task:	Leikkijät
Sender:	Pikaksi
Submission time:	2025-01-18 16:55:36 +0200
Language:	C++ (C++20)
Status:	READY
Result:	23

Feedback
group	verdict	score
#1	ACCEPTED	5
#2	ACCEPTED	8
#3	ACCEPTED	10
#4	WRONG ANSWER	0
#5	WRONG ANSWER	0
#6	WRONG ANSWER	0

Test results
test	verdict	time	group
#1	ACCEPTED	0.94 s	1, 2, 5, 6	details
#2	ACCEPTED	0.95 s	1, 2, 3, 5, 6	details
#3	ACCEPTED	0.94 s	1, 2, 5, 6	details
#4	ACCEPTED	0.94 s	1, 2, 4, 5, 6	details
#5	ACCEPTED	0.95 s	2, 5, 6	details
#6	ACCEPTED	0.95 s	2, 3, 5, 6	details
#7	ACCEPTED	0.95 s	2, 5, 6	details
#8	ACCEPTED	0.95 s	2, 4, 5, 6	details
#9	WRONG ANSWER	0.95 s	5, 6	details
#10	TIME LIMIT EXCEEDED	--	6	details
#11	ACCEPTED	0.95 s	1, 2, 5, 6	details
#12	TIME LIMIT EXCEEDED	--	6	details
#13	ACCEPTED	0.94 s	3, 5, 6	details
#14	ACCEPTED	0.94 s	3, 5, 6	details
#15	WRONG ANSWER	0.95 s	4, 5, 6	details
#16	WRONG ANSWER	0.95 s	5, 6	details
#17	TIME LIMIT EXCEEDED	--	6	details
#18	WRONG ANSWER	0.94 s	4, 5, 6	details
#19	WRONG ANSWER	0.95 s	5, 6	details
#20	TIME LIMIT EXCEEDED	--	6	details
#21	TIME LIMIT EXCEEDED	--	6	details
#22	WRONG ANSWER	0.95 s	5, 6	details

Compiler report

input/code.cpp: In function 'void solve()':
input/code.cpp:37:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |         for (int i = 0; i < order.size() - 1; i++) {
      |                         ~~^~~~~~~~~~~~~~~~~~

Code

#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
typedef long long ll;
// chmod u+x b.sh
void solve(); int main() {
    ios_base::sync_with_stdio(0); cout.tie(0);
    solve();
}

void solve()
{
    map<pair<int, int>, int> ma;
    for (int k = 1; k < 2500; k++) {
        vector<int> order;
        set<int> s;
        for (int i = 1; i <= k; i++) s.insert(i);
        auto it = s.begin();
        bool even = false;
        while (s.size() > 0) {
            auto it2 = it;
            it2++;
            if (it2 == s.end()) {
                it2 = s.begin();
            }
            if (even) {
                //cout << *it << " ";
                order.push_back(*it);
                s.erase(it);
            }
            even = !even;
            it = it2;
        }
        //cout << endl;
        //cout << order[0] << " ";
        for (int i = 0; i < order.size() - 1; i++) {
            //cout << order[i + 1] << " ";
            if (!ma.contains({order[i], order[i + 1]}))
                ma.insert({{order[i], order[i + 1]}, k});
        }
        //cout << endl;
    }
    int t;
    cin >> t;
    for (int i = 0; i < t; i++) {
        int a, b;
        cin >> a >> b;

        if (a % 2 == 0 && a > 2) {
            //cout << "ans2\n";
            if (b == 3) {
                cout << a << "\n";
            }
            else if (b == 1) {
                cout << a + 1 << "\n";
            }
            else if (a + 2 == b) {
                cout << b << "\n";
            }
            else {
                cout << "-1\n";
            }
        }
        else if (b % 2 == 0 && a % 2 != 0 && b > 1) {
            cout << "-1\n";
        }
        else if (a < b && a > 1000 && a % 2 == 1 && b % 2 == 1) {
            cout << max(a, b) << "\n";
        }


        else if (ma.contains({a, b}))
            cout << ma[{a, b}] << "\n";
        else
            cout << -1 << "\n";
    }
}

Test details

Test 1

Group: 1, 2, 5, 6

Verdict: ACCEPTED

input
`1000 42 100 73 94 1 13 31 100 ...` view save

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

user output
`-1 -1 -1 -1 -1 ...` Truncated

Test 2

Group: 1, 2, 3, 5, 6

Verdict: ACCEPTED

input
`1000 54 3 42 44 30 1 52 3 ...` view save

correct output
`54 44 31 52 15 ...` view save

user output
`54 44 31 52 15 ...` Truncated

Test 3

Group: 1, 2, 5, 6

Verdict: ACCEPTED

input
`1000 27 25 81 65 45 43 87 23 ...` view save

correct output
`-1 -1 -1 139 -1 ...` view save

user output
`-1 -1 -1 139 -1 ...` Truncated

Test 4

Group: 1, 2, 4, 5, 6

Verdict: ACCEPTED

input
`1000 55 63 39 71 95 96 61 69 ...` view save

correct output
`65 75 -1 72 98 ...` view save

user output
`65 75 -1 72 98 ...` Truncated

Test 5

Group: 2, 5, 6

Verdict: ACCEPTED

input
`1000 222 56 871 832 207 364 919 980 ...` view save

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

user output
`-1 -1 -1 -1 -1 ...` Truncated

Test 6

Group: 2, 3, 5, 6

Verdict: ACCEPTED

input
`1000 892 3 332 334 820 822 42 1 ...` view save

correct output
`892 334 822 43 108 ...` view save

user output
`892 334 822 43 108 ...` Truncated

Test 7

Group: 2, 5, 6

Verdict: ACCEPTED

input
`1000 77 93 319 575 509 381 675 707 ...` view save

correct output
`98 607 574 713 919 ...` view save

user output
`98 607 574 713 919 ...` Truncated

Test 8

Group: 2, 4, 5, 6

Verdict: ACCEPTED

input
`1000 969 985 233 489 403 659 427 555 ...` view save

correct output
`992 500 777 565 261 ...` view save

user output
`992 500 777 565 261 ...` Truncated

Test 9

Group: 5, 6

Verdict: WRONG ANSWER

input
`1000 10375 364462 501875 499131 495774 7544 133830 316225 ...` view save

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

user output
`-1 -1 -1 -1 -1 ...` Truncated

Test 10

Group: 6

Verdict: TIME LIMIT EXCEEDED

input
`100000 771321 298762 20752 494590 633649 443015 748804 831912 ...` view save

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

user output
(empty)

Test 11

Group: 1, 2, 5, 6

Verdict: ACCEPTED

input
`900 1 1 1 2 1 3 1 4 ...` view save

correct output
`-1 -1 3 -1 5 ...` view save

user output
`-1 -1 3 -1 5 ...` Truncated

Test 12

Group: 6

Verdict: TIME LIMIT EXCEEDED

input
`90000 1 1 1 2 1 3 1 4 ...` view save

correct output
`-1 -1 3 -1 5 ...` view save

user output
(empty)

Test 13

Group: 3, 5, 6

Verdict: ACCEPTED

input
`1000 237542 859435 965750 179154 972602 758585 453450 751662 ...` view save

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

user output
`-1 -1 -1 -1 -1 ...` Truncated

Test 14

Group: 3, 5, 6

Verdict: ACCEPTED

input
`1000 773164 1 870426 1 309736 309738 957602 957604 ...` view save

correct output
`773165 870427 309738 957604 513118 ...` view save

user output
`773165 870427 309738 957604 513118 ...` Truncated

Test 15

Group: 4, 5, 6

Verdict: WRONG ANSWER

input
`1000 178896 591355 54364 110987 361539 818612 275401 926643 ...` view save

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

user output
`-1 -1 -1 926643 822299 ...` Truncated

Test 16

Group: 5, 6

Verdict: WRONG ANSWER

input
`1000 704481 704465 696919 688727 941011 949203 171023 171025 ...` view save

correct output
`-1 -1 951785 -1 -1 ...` view save

user output
`-1 -1 949203 171025 -1 ...` Truncated

Test 17

Group: 6

Verdict: TIME LIMIT EXCEEDED

input
`100000 67901 133437 637521 637537 742567 742569 864043 864044 ...` view save

correct output
`148638 637540 -1 -1 652457 ...` view save

user output
(empty)

Test 18

Group: 4, 5, 6

Verdict: WRONG ANSWER

input
`1000 650375 650377 181841 443985 750137 750138 256969 322505 ...` view save

correct output
`-1 484136 -1 341476 850152 ...` view save

user output
`650377 443985 -1 322505 849361 ...` Truncated

Test 19

Group: 5, 6

Verdict: WRONG ANSWER

input
`1000 1 3 1 5 1 9 1 17 ...` view save

correct output
`3 5 10 20 40 ...` view save

user output
`3 5 10 20 40 ...` Truncated

Test 20

Group: 6

Verdict: TIME LIMIT EXCEEDED

input
`100000 1 3 1 5 1 9 1 17 ...` view save

correct output
`3 5 10 20 40 ...` view save

user output
(empty)

Test 21

Group: 6

Verdict: TIME LIMIT EXCEEDED

input
`100000 999999 1 999999 3 999999 5 999999 7 ...` view save

correct output
`1000002 1000005 1000000 1000011 1000001 ...` view save

user output
(empty)

Test 22

Group: 5, 6

Verdict: WRONG ANSWER

input
`1000 999999 1 999999 3 999999 5 999999 7 ...` view save

correct output
`1000002 1000005 1000000 1000011 1000001 ...` view save

user output
`-1 -1 -1 -1 -1 ...` Truncated

Datatähti 2025 loppu

Leikkijät

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

Test 19

Test 20

Test 21

Test 22

Tasks

Submissions (Pikaksi)