Submission #913922

#	Time	Username	Problem	Language	Result	Execution time	Memory
913922		12345678	Port Facility (JOI17_port_facility)	C++17	0 / 100	6 ms	8280 KiB

port_facility

#include <bits/stdc++.h>

using namespace std;

const int nx=1e6+5, mod=1e9+7;
long long n, cnt, p[nx];

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>n;
    p[0]=1;
    for (int i=1; i<nx; i++) p[i]=(p[i-1]*2)%mod;
    vector<pair<int, int>> v(n);
    for (auto &[x, y]:v) cin>>x>>y;
    sort(v.begin(), v.end());
    for (int i=0; i<n; i++)
    {
        int tmp=0;
        for (int j=0; j<i; j++) if (v[j].second<v[i].second&&v[j].second>v[i].first) tmp++;
        if (tmp>1) return cout<<0, 0;
        cnt+=(1-tmp);
    }
    cout<<p[cnt];
}

/*
4
4 5
3 6
2 7
1 8

4
1 5
2 6
3 7
4 8

4
1 2
3 4
5 7
6 8
*/

• Subtask 1: 0 / 10
• Subtask 2: 0 / 12
• Subtask 3: 0 / 56
• Subtask 4: 0 / 22