CSES - Aalto Competitive Programming 2026 - wk2 - Homework

Submission details
Task:	Apartments
Sender:	aalto26bh_002
Submission time:	2026-09-07 12:36:26 +0300
Language:	C++ (C++20)
Status:	READY
Result:	WRONG ANSWER

Test results
test	verdict	time
#1	WRONG ANSWER	0.00 s	details
#2	WRONG ANSWER	0.00 s	details
#3	WRONG ANSWER	0.00 s	details
#4	WRONG ANSWER	0.00 s	details
#5	WRONG ANSWER	0.13 s	details
#6	WRONG ANSWER	0.13 s	details
#7	WRONG ANSWER	0.11 s	details
#8	WRONG ANSWER	0.11 s	details
#9	WRONG ANSWER	0.00 s	details
#10	WRONG ANSWER	0.00 s	details
#11	WRONG ANSWER	0.00 s	details
#12	WRONG ANSWER	0.00 s	details
#13	WRONG ANSWER	0.28 s	details
#14	WRONG ANSWER	0.28 s	details
#15	WRONG ANSWER	0.28 s	details
#16	WRONG ANSWER	0.23 s	details
#17	WRONG ANSWER	0.08 s	details
#18	WRONG ANSWER	0.00 s	details
#19	ACCEPTED	0.00 s	details

Code

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

int main()
{
    int numApplicants, numAppartments, allowedDiff;
    cin >> numApplicants >> numAppartments >> allowedDiff;
    vector<int> desiredAppartmentSizes(numApplicants);
    for (int i = 0; i < numApplicants; i++)
    {
        cin >> desiredAppartmentSizes[i];
    }
    vector<int> appartmentSizes(numAppartments);
    vector<bool> appartmentOccupied(numAppartments, false);

    for (int i = 0; i < numAppartments; i++)
    {
        cin >> appartmentSizes[i];
    }

    sort(appartmentSizes.begin(), appartmentSizes.end());
    int cont = 0;
    for (int i = 0; i < numApplicants; i++)
    {
        auto lowerIdx = lower_bound(appartmentSizes.begin(), appartmentSizes.end(), desiredAppartmentSizes[i] - allowedDiff);
        auto upperIdx = upper_bound(appartmentSizes.begin(), appartmentSizes.end(), desiredAppartmentSizes[i] + allowedDiff);
        int upper = distance(appartmentSizes.begin(), upperIdx);
        int lower = distance(appartmentSizes.begin(), lowerIdx);
        int idx = lower + (upper - lower) / 2;
        if (!appartmentOccupied[idx])
        {
            appartmentOccupied[idx] = true;
            cont++;
        }
    }
    cout << numApplicants - cont;
}

Test details

Test 1

Verdict: WRONG ANSWER

input
`10 10 0 37 62 56 69 34 46 10 86 16 49 50 95 47 43 9 62 83 71 71 7` view save

correct output
`1` view save

user output
`4` view save

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

Test 2

Verdict: WRONG ANSWER

input
`10 10 10 90 41 20 39 49 21 35 31 74 86 14 24 24 7 82 85 82 4 60 95` view save

correct output
`6` view save

user output
`5` view save

Feedback: Incorrect character on line 1 col 1: expected "6", got "5"

Test 3

Verdict: WRONG ANSWER

input
`10 10 1000 59 5 65 15 42 81 58 96 50 1 18 59 71 65 97 83 80 68 92 67` view save

correct output
`10` view save

user output
`9` view save

Feedback: Incorrect character on line 1 col 1: expected "10", got "9"

Test 4

Verdict: WRONG ANSWER

input
`10 10 1000000000 25 80 59 43 67 21 77 5 8 99 66 41 62 24 88 55 1 53 50 60` view save

correct output
`10` view save

user output
`9` view save

Feedback: Incorrect character on line 1 col 1: expected "10", got "9"

Test 5

Verdict: WRONG ANSWER

input
`200000 200000 0 34 48 12 99 89 71 20 7 9 38 58...` view save

correct output
`197286` view save

user output
`199900` view save

Feedback: Incorrect character on line 1 col 3: expected "197286", got "199900"

Test 6

Verdict: WRONG ANSWER

input
`200000 200000 10 89 26 46 74 91 19 47 18 83 85 ...` view save

correct output
`200000` view save

user output
`199900` view save

Feedback: Incorrect character on line 1 col 1: expected "200000", got "199900"

Test 7

Verdict: WRONG ANSWER

input
`200000 200000 1000 71 84 11 90 70 59 60 11 52 65 ...` view save

correct output
`200000` view save

user output
`199999` view save

Feedback: Incorrect character on line 1 col 1: expected "200000", got "199999"

Test 8

Verdict: WRONG ANSWER

input
`200000 200000 1000000000 21 94 92 4 12 5 38 47 59 92 2 ...` view save

correct output
`200000` view save

user output
`199999` view save

Feedback: Incorrect character on line 1 col 1: expected "200000", got "199999"

Test 9

Verdict: WRONG ANSWER

input
`10 10 0 727245017 647121519 549745115 ...` view save

correct output
`0` view save

user output
`2` view save

Feedback: Incorrect character on line 1 col 1: expected "0", got "2"

Test 10

Verdict: WRONG ANSWER

input
`10 10 10 30734435 218114477 257355293 4...` view save

correct output
`0` view save

user output
`3` view save

Feedback: Incorrect character on line 1 col 1: expected "0", got "3"

Test 11

Verdict: WRONG ANSWER

input
`10 10 1000 7899629 162004163 327616450 51...` view save

correct output
`0` view save

user output
`4` view save

Feedback: Incorrect character on line 1 col 1: expected "0", got "4"

Test 12

Verdict: WRONG ANSWER

input
`10 10 1000000000 725746771 537157640 742868604 ...` view save

correct output
`10` view save

user output
`9` view save

Feedback: Incorrect character on line 1 col 1: expected "10", got "9"

Test 13

Verdict: WRONG ANSWER

input
`200000 200000 0 375495587 322263536 985991668 ...` view save

correct output
`42` view save

user output
`99995` view save

Feedback: Incorrect character on line 1 col 1: expected "42", got "99995"

Test 14

Verdict: WRONG ANSWER

input
`200000 200000 10 906603621 968136956 666786366 ...` view save

correct output
`846` view save

user output
`100092` view save

Feedback: Incorrect character on line 1 col 1: expected "846", got "100092"

Test 15

Verdict: WRONG ANSWER

input
`200000 200000 1000 215460174 880023362 242442952 ...` view save

correct output
`57149` view save

user output
`96209` view save

Feedback: Incorrect character on line 1 col 1: expected "57149", got "96209"

Test 16

Verdict: WRONG ANSWER

input
`200000 200000 1000000000 50349580 773460492 440699400 8...` view save

correct output
`200000` view save

user output
`199999` view save

Feedback: Incorrect character on line 1 col 1: expected "200000", got "199999"

Test 17

Verdict: WRONG ANSWER

input
`199999 1 1 199996 199997 149999 117797 19...` view save

correct output
`1` view save

user output
`199997` view save

Feedback: Incorrect character on line 1 col 2: expected "1", got "199997"

Test 18

Verdict: WRONG ANSWER

input
`5 2 2 2 2 2 40 50 40 50` view save

correct output
`2` view save

user output
`3` view save

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

Test 19

Verdict: ACCEPTED

input
`4 3 5 60 45 80 60 30 60 75` view save

correct output
`2` view save

user output
`2` view save

Aalto Competitive Programming 2026 - wk2 - Homework

Apartments

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

Tasks

Submissions (aalto26bh_002)