Submission #826921

#	Time	Username	Problem	Language	Result	Execution time	Memory
826921		Hanksburger	Festivals in JOI Kingdom 2 (JOI23_festival2)	C++17	5 / 100	9091 ms	212 KiB

festival2

#include <bits/stdc++.h>
using namespace std;
vector<pair<int, int> > vec, vec2;
int a[40005];
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n, p, ans=0;
    cin >> n >> p;
    for (int i=1; i<=n*2; i++)
        a[i]=i;
    do
    {
        int ok=1;
        for (int i=1; i<n; i++)
        {
            if (a[i]>a[i+1])
            {
                ok=0;
                break;
            }
        }
        for (int i=1; i<=n; i++)
        {
            if (a[i]>a[i+n])
            {
                ok=0;
                break;
            }
        }
        if (ok)
        {
            vec.clear();
            vec2.clear();
            for (int i=1; i<=n; i++)
            {
                vec.push_back({a[i], a[i+n]});
                vec2.push_back({a[i+n], a[i]});
            }
            sort(vec.begin(), vec.end());
            sort(vec2.begin(), vec2.end());
            int res=0, res2=0, pre=0, pre2=0;
            for (int i=0; i<vec.size(); i++)
            {
                if (pre<vec[i].first)
                {
                    pre=vec[i].second;
                    res++;
                }
            }
            for (int i=0; i<vec2.size(); i++)
            {
                if (pre2<vec2[i].second)
                {
                    pre2=vec2[i].first;
                    res2++;
                }
            }
            if (res<res2)
                ans++;
        }
    }
    while (next_permutation(a+1, a+n*2+1));
    cout << ans%p;
}

Compilation message (stderr)

festival2.cpp: In function 'int main()':
festival2.cpp:45:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |             for (int i=0; i<vec.size(); i++)
      |                           ~^~~~~~~~~~~
festival2.cpp:53:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |             for (int i=0; i<vec2.size(); i++)
      |                           ~^~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 5
• Subtask 3: 0 / 27
• Subtask 4: 0 / 14
• Subtask 5: 0 / 36
• Subtask 6: 0 / 13