Submission #129393

#	Time	Username	Problem	Language	Result	Execution time	Memory
129393		souhhcong	Exhibition (JOI19_ho_t2)	C++14	100 / 100	248 ms	1680 KiB

joi2019_ho_t2

#include <iostream>
#include <algorithm>
using namespace std;

#define st first
#define nd second
const int N = 1e5+5;
int n, m;
pair<int,int> pic[N];
int frame[N];

bool check(int val)
{
    int pos = val;
    for (int i = 0; i < n; i++)
    {
        if (pic[i].nd <= frame[pos])
        {
            pos++;
        }
    }
    //cout << pos << endl;
    if (pos == m)
        return 1;
    return 0;
}

int main()
{
    cin >> n >> m;
    for (int i = 0; i < n; i++)
    {
        cin >> pic[i].nd >> pic[i].st;
    }
    for (int i = 0; i < m; i++)
    {
        cin >> frame[i];
    }
    sort(pic,pic+n);
    sort(frame,frame+m);
    int l = 0, r = m, mid, ans = 0;
    while(l != r)
    {
        mid = (l+r)/2;
        //cout << l << ' ' << mid << ' ' << r << endl;
        if (check(m-mid))
        {
            ans = max(ans,mid);
            l = mid+1;
        }
        else
            r = mid;
        if (l == r)
        {
            if (check(m-l))
                ans = max(ans,l);
        }
    }
    cout << ans;
}

• Subtask 1: 10 / 10
• Subtask 2: 40 / 40
• Subtask 3: 50 / 50