Submission #540779

#	Time	Username	Problem	Language	Result	Execution time	Memory
540779		status_coding	Exhibition (JOI19_ho_t2)	C++14	100 / 100	152 ms	4444 KiB

joi2019_ho_t2

#include <bits/stdc++.h>

using namespace std;

struct pos
{
    int val, s;

    bool operator<(pos b)
    {
        if(val != b.val)
            return val<b.val;
        return s < b.s;
    }
};

int n,m;
pos v[100005];
int s[100005];

int st, dr, mij, last;

bool ok(int k)
{
    int j=m-k+1;
    for(int i=1;i<=n;i++)
    {
        if(j<=m && v[i].s <= s[j])
            j++;
    }

    return (j == m+1);
}

int main()
{
    cin>>n>>m;

    for(int i=1;i<=n;i++)
        cin>>v[i].s>>v[i].val;
    sort(v+1, v+n+1);

    for(int i=1;i<=m;i++)
        cin>>s[i];
    sort(s+1, s+m+1);


    st=1, dr=n;
    while(st <= dr)
    {
        mij = (st+dr)/2;

        if(ok(mij))
        {
            last=mij;
            st=mij+1;
        }
        else
            dr=mij-1;
    }

    cout<<last;
    return 0;
}

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