oj.uz

Submission #172142

# Submission time Handle Problem Language Result Execution time Memory
172142 2019-12-31T11:19:52 Z emil_physmath Nice sequence (IZhO18_sequence) C++17
15 / 100
 33 ms 11300 KB 
#include <algorithm>
#include <iostream>
#include <vector>
#include <set>
using namespace std;
typedef double ldouble;
typedef long long llong;
typedef unsigned int uint;
const int maxN = 100001;

vector<int> nei[400001];
int a[400001];
bool used[400001];

void DFS(int v, vector<int>& order)
{
    used[v] = true;
    for (int to: nei[v])
        if (!used[to])
            DFS(to, order);
    order.push_back(v);
}
bool Check(int n, int m, int len)
{
    if (len >= n)
    {
        llong sum = 0;
        for (int i = 1; i <= n; ++i)
            sum += a[i];
        if (sum >= 0) return false;
        for (int i = 2; i + n - 1 <= len; ++i)
        {
            sum -= a[i - 1];
            sum += a[i + n - 1];
            if (sum >= 0) return false;
        }
    }
    if (len >= m)
    {
        llong sum = 0;
        for (int i = 1; i <= m; ++i)
            sum += a[i];
        if (sum <= 0) return false;
        for (int i = 2; i + m - 1 <= len; ++i)
        {
            sum -= a[i - 1];
            sum += a[i + m - 1];
            if (sum <= 0) return false;
        }
    }
    return true;
}
int main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);

    int t;
    cin >> t;
    while (t--)
    {
        int n, m;
        cin >> n >> m;
        int ans = 0;
        vector<int> ansArr;
        int l = max(n, m) - 1, r = max(n, m) + max(n, m) % min(n, m);
        while (l <= r)
        {
            int len = (l + r) / 2;
            for (int i = 0; i <= len; ++i)
            {
                used[i] = false;
                vector<int>().swap(nei[i]);
            }
            for (int i = 1; i <= len; ++i)
            {
                if (i - n >= 0)
                    nei[i].push_back(i - n);
                if (i - m >= 0)
                    nei[i - m].push_back(i);
            }
            vector<int> order;
            for (int i = 0; i <= len; ++i)
                if (!used[i])
                    DFS(i, order);
            reverse(order.begin(), order.end());
            vector<int> pref(len + 1);
            for (int i = 0; i < order.size(); ++i)
                pref[order[i]] = i;
            for (int i = 1; i < pref.size(); ++i)
                pref[i] -= pref[0];
            pref[0] = 0;
            for (int i = 1; i <= len; ++i)
                a[i] = pref[i] - pref[i - 1];
            if (Check(n, m, len))
            {
                ans = len;
                ansArr.resize(len);
                for (int i = 0; i < len; ++i)
                    ansArr[i] = a[i + 1];
                l = len + 1;
            }
            else
                r = len - 1;
        }
        cout << ans << endl;
        for (int i = 0; i < ans; ++i)
            cout << ansArr[i] << ' ';
        cout << '\n';
    }
}

Compilation message

sequence.cpp: In function 'int main()':
sequence.cpp:89:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for (int i = 0; i < order.size(); ++i)
                             ~~^~~~~~~~~~~~~~
sequence.cpp:91:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for (int i = 1; i < pref.size(); ++i)
                             ~~^~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 9720 KB Ok
2 Correct 10 ms 9720 KB Ok
3 Correct 10 ms 9720 KB Ok
4 Correct 10 ms 9720 KB Ok
5 Correct 10 ms 9720 KB Ok
6 Correct 10 ms 9724 KB Ok
7 Correct 10 ms 9720 KB Ok
8 Correct 10 ms 9720 KB Ok
9 Correct 10 ms 9720 KB Ok
10 Correct 10 ms 9720 KB Ok
11 Correct 10 ms 9720 KB Ok
12 Correct 10 ms 9720 KB Ok

Subtask #2
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 9720 KB Ok
2 Correct 10 ms 9720 KB Ok
3 Correct 10 ms 9720 KB Ok
4 Correct 10 ms 9720 KB Ok
5 Correct 10 ms 9720 KB Ok
6 Correct 14 ms 9976 KB Ok
7 Correct 30 ms 11008 KB Ok
8 Correct 19 ms 10320 KB Ok
9 Correct 33 ms 11300 KB Ok
10 Correct 25 ms 10616 KB Ok

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 9720 KB Ok
2 Correct 10 ms 9720 KB Ok
3 Correct 10 ms 9720 KB Ok
4 Correct 10 ms 9720 KB Ok
5 Incorrect 11 ms 9848 KB Jury has the better answer : jans = 11, pans = 10
6 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 10 ms 9720 KB Jury has the better answer : jans = 7, pans = 6
2 Halted 0 ms 0 KB -

Subtask #5
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 9720 KB Ok
2 Correct 10 ms 9720 KB Ok
3 Correct 10 ms 9720 KB Ok
4 Correct 10 ms 9720 KB Ok
5 Correct 10 ms 9720 KB Ok
6 Correct 10 ms 9724 KB Ok
7 Correct 10 ms 9720 KB Ok
8 Correct 10 ms 9720 KB Ok
9 Correct 10 ms 9720 KB Ok
10 Correct 10 ms 9720 KB Ok
11 Correct 10 ms 9720 KB Ok
12 Correct 10 ms 9720 KB Ok
13 Correct 10 ms 9720 KB Ok
14 Correct 10 ms 9720 KB Ok
15 Correct 10 ms 9720 KB Ok
16 Correct 10 ms 9720 KB Ok
17 Incorrect 11 ms 9848 KB Jury has the better answer : jans = 11, pans = 10
18 Halted 0 ms 0 KB -

Subtask #6
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 9720 KB Ok
2 Correct 10 ms 9720 KB Ok
3 Correct 10 ms 9720 KB Ok
4 Correct 10 ms 9720 KB Ok
5 Correct 10 ms 9720 KB Ok
6 Correct 10 ms 9724 KB Ok
7 Correct 10 ms 9720 KB Ok
8 Correct 10 ms 9720 KB Ok
9 Correct 10 ms 9720 KB Ok
10 Correct 10 ms 9720 KB Ok
11 Correct 10 ms 9720 KB Ok
12 Correct 10 ms 9720 KB Ok
13 Correct 10 ms 9720 KB Ok
14 Correct 10 ms 9720 KB Ok
15 Correct 10 ms 9720 KB Ok
16 Correct 10 ms 9720 KB Ok
17 Correct 10 ms 9720 KB Ok
18 Correct 14 ms 9976 KB Ok
19 Correct 30 ms 11008 KB Ok
20 Correct 19 ms 10320 KB Ok
21 Correct 33 ms 11300 KB Ok
22 Correct 25 ms 10616 KB Ok
23 Correct 10 ms 9720 KB Ok
24 Correct 10 ms 9720 KB Ok
25 Correct 10 ms 9720 KB Ok
26 Correct 10 ms 9720 KB Ok
27 Incorrect 11 ms 9848 KB Jury has the better answer : jans = 11, pans = 10
28 Halted 0 ms 0 KB -

Subtask #7
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 9720 KB Ok
2 Correct 10 ms 9720 KB Ok
3 Correct 10 ms 9720 KB Ok
4 Correct 10 ms 9720 KB Ok
5 Correct 10 ms 9720 KB Ok
6 Correct 10 ms 9724 KB Ok
7 Correct 10 ms 9720 KB Ok
8 Correct 10 ms 9720 KB Ok
9 Correct 10 ms 9720 KB Ok
10 Correct 10 ms 9720 KB Ok
11 Correct 10 ms 9720 KB Ok
12 Correct 10 ms 9720 KB Ok
13 Correct 10 ms 9720 KB Ok
14 Correct 10 ms 9720 KB Ok
15 Correct 10 ms 9720 KB Ok
16 Correct 10 ms 9720 KB Ok
17 Correct 10 ms 9720 KB Ok
18 Correct 14 ms 9976 KB Ok
19 Correct 30 ms 11008 KB Ok
20 Correct 19 ms 10320 KB Ok
21 Correct 33 ms 11300 KB Ok
22 Correct 25 ms 10616 KB Ok
23 Correct 10 ms 9720 KB Ok
24 Correct 10 ms 9720 KB Ok
25 Correct 10 ms 9720 KB Ok
26 Correct 10 ms 9720 KB Ok
27 Incorrect 11 ms 9848 KB Jury has the better answer : jans = 11, pans = 10
28 Halted 0 ms 0 KB -