CSES - Datatähti 2025 alku - Results
Submission details
Task:Tikut
Sender:zli0122
Submission time:2024-11-10 22:22:29 +0200
Language:C++ (C++11)
Status:READY
Result:7
Feedback
groupverdictscore
#1ACCEPTED7
#20
#30
#40
#50
#60
Test results
testverdicttimegroup
#1ACCEPTED0.00 s1, 3, 4, 5, 6details
#2ACCEPTED0.01 s1, 4, 5, 6details
#3ACCEPTED0.01 s1, 4, 5, 6details
#4ACCEPTED0.01 s1, 4, 5, 6details
#5--2, 5, 6details
#6--2, 5, 6details
#7--3, 5, 6details
#8ACCEPTED0.00 s3, 5, 6details
#9--3, 5, 6details
#10--3, 5, 6details
#11--3, 5, 6details
#12--4, 5, 6details
#13--4, 5, 6details
#14--4, 5, 6details
#15--4, 5, 6details
#16ACCEPTED0.02 s5, 6details
#17--5, 6details
#18--5, 6details
#19--5, 6details
#20--6details
#21--6details
#22--6details

Code

#include <bits/stdc++.h>
#define INF INT32_MAX/2 + 1;
using namespace std;

int N, M;

vector<vector<int>> generate_sequences(int l, int k) {
    if (l == 1) {
        if (k > 0) return {{k}};
        return {};
    }

    vector<vector<int>> sequences;
    for (int i = 1; i <= k - l + 1; i++){
        for (auto current: generate_sequences(l - 1, k - i)) {
            current.push_back(i);
            sequences.push_back(current);
        }
    }
    return sequences;
}

int main() {
    cin >> N >> M;

    int a;
    vector<int> pieces(N, 1);
    vector<int> s;
    vector<int> m(N);
    for (int _ = 0; _ < N; _++) {
        cin >> a;
        s.push_back(a);
    }
    sort(s.rbegin(), s.rend());
    int global_min = s.back();
    
    for (int i = 0; i < N; i++) m[i]=s[i];

    //for (auto i: s) cout << i << " ";cout << endl;
    
    int max_index, max_value, minmax, maxmin, d1, d2;
    int prev_d = INF;
    for (int k = 1; k <= M; k++) {
        // find the index of the two cuts maximizing min and minimizing max respectively
        minmax = maxmin = 0;
        for (int i = 0; i < N; i++) {
            if (m[i] > m[minmax]) minmax = i;
            if (s[i]*(pieces[maxmin] + 1) > s[maxmin]*(pieces[i] + 1)) maxmin = i;
        }

        // find max_value among the sticks after we minimize max.
        max_index = minmax ^ 1;
        max_value = (s[minmax]-1)/(pieces[minmax]+1) + 1;
        for (int i = 0; i < N; i++) {
            if (i == minmax) continue;
            if (m[i] >= m[max_index] and m[i] > max_value) {
                max_index = i;
                max_value = m[max_index];
            }
        }
        d1 = max_value - min(global_min, s[minmax]/(pieces[minmax]+1));

        // find max_value among the sticks after we minimize max.
        max_index = maxmin ^ 1;
        max_value = (s[maxmin]-1)/(pieces[maxmin]+1) + 1;
        for (int i = 0; i < N; i++) {
            if (i == maxmin) continue;
            if (m[i] >= m[max_index] and m[i] > max_value) {
                max_index = i;
                max_value = m[max_index];
            }
        }

        d2 = max_value - min(global_min, s[maxmin]/(pieces[maxmin]+1));

        if (d1 > d2) minmax = maxmin;
        if (prev_d > min(d1, d2)) prev_d = min(d1, d2);

        // otherwise we should try complete search to get out of local optimum trap.
        else {
            prev_d = min(d1, d2);
            for (auto pieces : generate_sequences(N, N+k)) {
                int max_val = 0;
                int min_val = INF;
                for (int i = 0; i < N; i++) {
                    max_val = max(max_val, (s[i]-1)/pieces[i] + 1);
                    min_val = min(min_val, s[i]/pieces[i]);
                }
                prev_d = min(prev_d, max_val-min_val);
            }
        }
        

        cout << prev_d << " ";

        // cut the piece
        pieces[minmax]++;
        m[minmax] = (s[minmax]-1)/pieces[minmax] + 1;
        global_min = min(global_min, s[minmax]/pieces[minmax]);

        
    }
    cout << "\n";
}

Test details

Test 1

Group: 1, 3, 4, 5, 6

Verdict: ACCEPTED

input
1 1
6

correct output

user output

Test 2

Group: 1, 4, 5, 6

Verdict: ACCEPTED

input
5 10
4 8 6 2 7

correct output
5 4 2 2 2 1 1 1 1 1 

user output
5 4 2 2 2 1 1 1 1 1 

Test 3

Group: 1, 4, 5, 6

Verdict: ACCEPTED

input
5 10
5 5 8 6 7

correct output
3 3 2 3 2 2 1 1 1 2 

user output
3 3 2 3 2 2 1 1 1 2 

Test 4

Group: 1, 4, 5, 6

Verdict: ACCEPTED

input
5 10
8 7 9 6 10

correct output
4 4 3 3 2 2 1 2 2 1 

user output
4 4 3 3 2 2 1 2 2 1 

Test 5

Group: 2, 5, 6

Verdict:

input
1000 1071
3 2 3 1 3 3 2 3 2 3 2 2 2 1 2 ...

correct output
2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 ...

user output
(empty)

Test 6

Group: 2, 5, 6

Verdict:

input
1000 1500
3 2 2 3 2 3 2 2 2 3 2 2 3 3 3 ...

correct output
2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 ...

user output
(empty)

Test 7

Group: 3, 5, 6

Verdict:

input
1000 2
15 710 210 347 398 66 318 277 ...

correct output
994 994 

user output
(empty)

Test 8

Group: 3, 5, 6

Verdict: ACCEPTED

input
1000 2
743 890 592 942 736 969 616 50...

correct output
498 496 

user output
498 496 

Test 9

Group: 3, 5, 6

Verdict:

input
1000 2
987 968 920 994 988 918 914 95...

correct output
500 500 

user output
(empty)

Test 10

Group: 3, 5, 6

Verdict:

input
1000 2
996 1000 998 998 999 997 997 9...

correct output
500 500 

user output
(empty)

Test 11

Group: 3, 5, 6

Verdict:

input
1000 2
501 501 501 501 501 501 501 50...

correct output
1 168 

user output
(empty)

Test 12

Group: 4, 5, 6

Verdict:

input
100 200
145 136 74 83 73 36 196 115 11...

correct output
194 190 189 183 182 181 181 17...

user output
(empty)

Test 13

Group: 4, 5, 6

Verdict:

input
100 200
157 110 168 155 192 107 146 15...

correct output
95 96 96 95 93 94 94 94 90 91 ...

user output
(empty)

Test 14

Group: 4, 5, 6

Verdict:

input
50 200
137 118 160 118 146 160 140 18...

correct output
98 98 98 96 90 91 88 88 84 86 ...

user output
(empty)

Test 15

Group: 4, 5, 6

Verdict:

input
100 200
147 174 186 148 155 128 158 18...

correct output
99 99 98 98 97 97 96 96 95 95 ...

user output
(empty)

Test 16

Group: 5, 6

Verdict: ACCEPTED

input
1000 2000
928772177 816188227 216592201 ...

correct output
991676844 990940224 990685481 ...

user output
991676844 990940224 990685481 ...

Test 17

Group: 5, 6

Verdict:

input
1000 2000
665759876 597950008 615453266 ...

correct output
498801198 498681904 498504321 ...

user output
(empty)

Test 18

Group: 5, 6

Verdict:

input
500 2000
683288817 784230412 626685186 ...

correct output
497667621 498434895 495465990 ...

user output
(empty)

Test 19

Group: 5, 6

Verdict:

input
1000 2000
666667000 809309500 571572000 ...

correct output
499499500 499249250 498999000 ...

user output
(empty)

Test 20

Group: 6

Verdict:

input
100000 200000
861772559 734298084 983382252 ...

correct output
499973914 499985299 499985141 ...

user output
(empty)

Test 21

Group: 6

Verdict:

input
30000 200000
691834579 617419813 514778075 ...

correct output
499967533 499976270 499969810 ...

user output
(empty)

Test 22

Group: 6

Verdict:

input
100000 200000
820255000 960780000 741965000 ...

correct output
499995000 499992500 499990000 ...

user output
(empty)