Submission #827143

#	Time	Username	Problem	Language	Result	Execution time	Memory
827143		Hanksburger	Festivals in JOI Kingdom 2 (JOI23_festival2)	C++17	10 / 100	9072 ms	320 KiB

festival2

#include <bits/stdc++.h>
using namespace std;
vector<pair<int, int> > vec, vec2;
int a[2][35], n, p, ans;
void recur(int ind)
{
    if (ind>n*2)
    {
        vec.clear();
        vec2.clear();
        for (int i=1; i<=n; i++)
        {
            vec.push_back({a[0][i], a[1][i]});
            vec2.push_back({a[1][i], a[0][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++;
        return;
    }
    for (int i=1; i<=n; i++)
    {
        if ((i==1 || a[0][i-1]) && !a[0][i])
        {
            a[0][i]=ind;
            recur(ind+1);
            a[0][i]=0;
        }
    }
    for (int i=1; i<=n; i++)
    {
        if (a[0][i] && !a[1][i])
        {
            a[1][i]=ind;
            recur(ind+1);
            a[1][i]=0;
        }
    }
}
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin >> n;
    recur(1);
    cout << ans; // remember to put p back here later
}

Compilation message (stderr)

festival2.cpp: In function 'void recur(int)':
festival2.cpp:19:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |         for (int i=0; i<vec.size(); i++)
      |                       ~^~~~~~~~~~~
festival2.cpp:27:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |         for (int i=0; i<vec2.size(); i++)
      |                       ~^~~~~~~~~~~~

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