CSES - Aalto Competitive Programming 2025 - wk1 - Wed

Submission details
Task:	Aquarium
Sender:	aalto25a_008
Submission time:	2025-09-08 14:19:40 +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	ACCEPTED	0.00 s	details
#5	WRONG ANSWER	0.00 s	details
#6	WRONG ANSWER	0.00 s	details
#7	ACCEPTED	0.00 s	details
#8	WRONG ANSWER	0.00 s	details
#9	WRONG ANSWER	0.01 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	0.00 s	details
#14	WRONG ANSWER	0.00 s	details
#15	WRONG ANSWER	0.00 s	details
#16	WRONG ANSWER	0.00 s	details
#17	WRONG ANSWER	0.00 s	details
#18	WRONG ANSWER	0.00 s	details
#19	WRONG ANSWER	0.00 s	details
#20	WRONG ANSWER	0.00 s	details
#21	WRONG ANSWER	0.00 s	details
#22	WRONG ANSWER	0.00 s	details
#23	WRONG ANSWER	0.00 s	details
#24	WRONG ANSWER	0.00 s	details
#25	WRONG ANSWER	0.00 s	details
#26	WRONG ANSWER	0.00 s	details
#27	WRONG ANSWER	0.00 s	details
#28	WRONG ANSWER	0.00 s	details
#29	WRONG ANSWER	0.00 s	details
#30	WRONG ANSWER	0.00 s	details
#31	WRONG ANSWER	0.00 s	details
#32	WRONG ANSWER	0.00 s	details
#33	WRONG ANSWER	0.00 s	details
#34	WRONG ANSWER	0.00 s	details
#35	WRONG ANSWER	0.00 s	details
#36	WRONG ANSWER	0.00 s	details
#37	WRONG ANSWER	0.00 s	details
#38	WRONG ANSWER	0.00 s	details
#39	WRONG ANSWER	0.00 s	details
#40	WRONG ANSWER	0.00 s	details
#41	WRONG ANSWER	0.00 s	details
#42	WRONG ANSWER	0.00 s	details
#43	WRONG ANSWER	0.00 s	details
#44	WRONG ANSWER	0.00 s	details

Code

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

int n, q;
long double V;
vector<long double> h;

// Precomputed barriers
vector<long double> leftLimit, rightLimit;

long double computeVolume(long double W) {
    long double vol = 0.0;
    for (int i = 0; i < n; i++) {
        long double limit = min({leftLimit[i], rightLimit[i], W});
        if (limit > h[i]) vol += (limit - h[i]);
    }
    return vol;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    cin >> n;
    h.resize(n);
    for (int i = 0; i < n; i++) cin >> h[i];
    cin >> q >> V;

    // Precompute barriers
    leftLimit.resize(n);
    rightLimit.resize(n);

    // Left barrier from q (0-based)
    leftLimit[q - 1] = 1e18;
    for (int i = q - 2; i >= 0; i--)
        leftLimit[i] = min(h[i + 1], leftLimit[i + 1]);
    for (int i = q; i < n; i++)
        leftLimit[i] = leftLimit[i - 1];

    // Right barrier from q
    rightLimit[q - 1] = 1e18;
    for (int i = q; i < n; i++)
        rightLimit[i] = min(h[i - 1], rightLimit[i - 1]);
    for (int i = q - 2; i >= 0; i--)
        rightLimit[i] = rightLimit[i + 1];

    // Binary search for water level
    long double low = h[q - 1], high = *max_element(h.begin(), h.end()) + V;
    for (int iter = 0; iter < 100; iter++) {
        long double mid = (low + high) / 2.0;
        if (computeVolume(mid) < V)
            low = mid;
        else
            high = mid;
    }

    cout << fixed << setprecision(5) << (low + high) / 2.0 << "\n";
    return 0;
}

Test details

Test 1

Verdict: WRONG ANSWER

input
`1 1 1 1` view save

correct output
`1` view save

user output
`2.00000` view save

Test 2

Verdict: WRONG ANSWER

input
`2 1 2 1 1` view save

correct output
`1` view save

user output
`2.00000` view save

Test 3

Verdict: WRONG ANSWER

input
`3 1 1 3 2 7` view save

correct output
`1` view save

user output
`8.00000` view save

Test 4

Verdict: ACCEPTED

input
`5 1 1 5 3 5 3 6` view save

correct output
`5` view save

user output
`5.00000` view save

Test 5

Verdict: WRONG ANSWER

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

correct output
`2` view save

user output
`5.00000` view save

Test 6

Verdict: WRONG ANSWER

input
`8 7 5 3 1 2 4 6 8 4 7` view save

correct output
`3` view save

user output
`8.00000` view save

Test 7

Verdict: ACCEPTED

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

correct output
`5` view save

user output
`5.00000` view save

Test 8

Verdict: WRONG ANSWER

input
`10 9 7 5 3 1 2 4 6 8 10 5 11` view save

correct output
`3.66667` view save

user output
`12.00000` view save

Test 9

Verdict: WRONG ANSWER

input
`12 11 9 7 5 3 1 2 4 6 8 10 12 6 16` view save

correct output
`4` view save

user output
`17.00000` view save

Test 10

Verdict: WRONG ANSWER

input
`14 13 11 9 7 5 3 1 2 4 6 8 10 12 ...` view save

correct output
`5` view save

user output
`23.00000` view save

Test 11

Verdict: WRONG ANSWER

input
`16 15 13 11 9 7 5 3 1 2 4 6 8 10 ...` view save

correct output
`5.6` view save

user output
`29.00000` view save

Test 12

Verdict: WRONG ANSWER

input
`18 17 15 13 11 9 7 5 3 1 2 4 6 8 ...` view save

correct output
`6` view save

user output
`37.00000` view save

Test 13

Verdict: WRONG ANSWER

input
`20 19 17 15 13 11 9 7 5 3 1 2 4 6...` view save

correct output
`7` view save

user output
`45.00000` view save

Test 14

Verdict: WRONG ANSWER

input
`25 5 1 24 14 24 11 13 11 9 9 4 6 ...` view save

correct output
`6` view save

user output
`11.00000` view save

Test 15

Verdict: WRONG ANSWER

input
`30 29 27 25 23 21 19 17 15 13 11 ...` view save

correct output
`10` view save

user output
`100.00000` view save

Test 16

Verdict: WRONG ANSWER

input
`40 39 37 35 33 31 29 27 25 23 21 ...` view save

correct output
`13.4615` view save

user output
`176.00000` view save

Test 17

Verdict: WRONG ANSWER

input
`50 49 47 45 43 41 39 37 35 33 31 ...` view save

correct output
`17` view save

user output
`274.00000` view save

Test 18

Verdict: WRONG ANSWER

input
`70 69 67 65 63 61 59 57 55 53 51 ...` view save

correct output
`23.2609` view save

user output
`536.00000` view save

Test 19

Verdict: WRONG ANSWER

input
`1 1 1 1` view save

correct output
`1` view save

user output
`2.00000` view save

Test 20

Verdict: WRONG ANSWER

input
`2 3 2 1 16` view save

correct output
`3` view save

user output
`18.00000` view save

Test 21

Verdict: WRONG ANSWER

input
`3 6 4 3 3 81` view save

correct output
`3` view save

user output
`84.00000` view save

Test 22

Verdict: WRONG ANSWER

input
`5 14 8 5 24 16 5 625` view save

correct output
`16` view save

user output
`630.00000` view save

Test 23

Verdict: WRONG ANSWER

input
`6 19 11 6 34 23 35 3 1296` view save

correct output
`19` view save

user output
`1302.00000` view save

Test 24

Verdict: WRONG ANSWER

input
`8 32 18 9 61 39 62 32 35 4 4096` view save

correct output
`61` view save

user output
`4076.00000` view save

Test 25

Verdict: WRONG ANSWER

input
`9 40 22 10 77 49 78 40 44 39 3 6561` view save

correct output
`40` view save

user output
`6571.00000` view save

Test 26

Verdict: WRONG ANSWER

input
`10 49 26 12 94 60 96 49 54 48 39 4 10000` view save

correct output
`94` view save

user output
`9957.00000` view save

Test 27

Verdict: WRONG ANSWER

input
`12 69 36 15 135 85 138 69 76 67 5...` view save

correct output
`69` view save

user output
`20751.00000` view save

Test 28

Verdict: WRONG ANSWER

input
`14 93 47 18 184 114 187 93 102 90...` view save

correct output
`141` view save

user output
`38386.00000` view save

Test 29

Verdict: WRONG ANSWER

input
`16 121 60 22 240 148 244 120 132 ...` view save

correct output
`240` view save

user output
`65454.00000` view save

Test 30

Verdict: WRONG ANSWER

input
`18 151 74 25 303 186 308 151 166 ...` view save

correct output
`303` view save

user output
`104869.00000` view save

Test 31

Verdict: WRONG ANSWER

input
`20 186 90 29 374 229 381 185 204 ...` view save

correct output
`286` view save

user output
`159997.00000` view save

Test 32

Verdict: WRONG ANSWER

input
`25 287 136 40 584 355 594 286 316...` view save

correct output
`516` view save

user output
`390615.00000` view save

Test 33

Verdict: WRONG ANSWER

input
`30 409 191 52 841 508 855 409 452...` view save

correct output
`656` view save

user output
`809575.00000` view save

Test 34

Verdict: WRONG ANSWER

input
`40 720 328 80 1494 898 1519 719 7...` view save

correct output
`1519` view save

user output
`2559235.00000` view save

Test 35

Verdict: WRONG ANSWER

input
`50 1118 503 113 2333 1397 2372 11...` view save

correct output
`2372` view save

user output
`6248509.00000` view save

Test 36

Verdict: WRONG ANSWER

input
`70 2176 964 195 4570 2725 4648 21...` view save

correct output
`4648` view save

user output
`24007676.00000` view save

Test 37

Verdict: WRONG ANSWER

input
`100 4416 1932 356 9323 5542 9483 4...` view save

correct output
`9700` view save

user output
`100000356.00000` view save

Test 38

Verdict: WRONG ANSWER

input
`500 104548 249301 180224 233177 52...` view save

correct output
`104548` view save

user output
`62500000528.00000` view save

Test 39

Verdict: WRONG ANSWER

input
`600 150482 358999 259492 335771 64...` view save

correct output
`353835` view save

user output
`129599932044.00000` view save

Test 40

Verdict: WRONG ANSWER

input
`900 446578 58127 573897 680544 236...` view save

correct output
`790626` view save

user output
`656099273633.00000` view save

Test 41

Verdict: WRONG ANSWER

input
`900 783372 729637 443692 140636 78...` view save

correct output
`805592` view save

user output
`656099229837.00000` view save

Test 42

Verdict: WRONG ANSWER

input
`100 4416 1932 356 9323 5542 9483 4...` view save

correct output
`9700` view save

user output
`100000356.00000` view save

Test 43

Verdict: WRONG ANSWER

input
`500 104548 249301 180224 233177 52...` view save

correct output
`104548` view save

user output
`62500000528.00000` view save

Test 44

Verdict: WRONG ANSWER

input
`600 150482 358999 259492 335771 64...` view save

correct output
`353835` view save

user output
`129599932044.00000` view save

Aalto Competitive Programming 2025 - wk1 - Wed

Aquarium

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

Test 23

Test 24

Test 25

Test 26

Test 27

Test 28

Test 29

Test 30

Test 31

Test 32

Test 33

Test 34

Test 35

Test 36

Test 37

Test 38

Test 39

Test 40

Test 41

Test 42

Test 43

Test 44

Tasks

Submissions (aalto25a_008)