Submission #153070

#	Time	Username	Problem	Language	Result	Execution time	Memory
153070		pr3pony	Exhibition (JOI19_ho_t2)	C++14	100 / 100	83 ms	4572 KiB

joi2019_ho_t2

#include<bits/stdc++.h>
using namespace std;
typedef pair<int,int> pii;
#define F first
#define S second
const int N = 1e5+87;
pii a[N];
int n,m,c[N];
bool ok(int k)
{
    int j = m-k;
    for (int i = 0; i < n && j < m; ++i)
        if (a[i].S <= c[j])
            ++j;
    return j == m;
}
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cin >> n >> m;
    for (int i = 0; i < n; ++i)
        cin >> a[i].S >> a[i].F;
    for (int i = 0; i < m; ++i)
        cin >> c[i];
    sort(a,a+n);
    sort(c,c+m);
    int l=1,r=min(n,m);
    while (l<=r) {
        int k=(l+r)/2;
        if (ok(k))
            l=k+1;
        else
            r=k-1;
    }
    cout << r << endl;
}

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