Submission #99730

#	Time	Username	Problem	Language	Result	Execution time	Memory
99730		Fasho	Exhibition (JOI19_ho_t2)	C++14	100 / 100	87 ms	2812 KiB

joi2019_ho_t2

#include <bits/stdc++.h>
#define N 1000005
#define ll long long int  
#define mp make_pair
#define pb push_back
#define ppb pop_back
#define sp " "
#define endl "\n"
#define fi first
#define se second
#define ii pair<int,int>
#define lli pair<ll,ll>
#define fast cin.tie(0);cout.tie(0);ios_base::sync_with_stdio(false)
#define fast2 freopen ("myfile.in","r",stdin);freopen ("myfile.out","w",stdout);
#define mod 1000000007
#define fs(x,y) for(int i=1;i<=y;i++) cin>>x[i];
#define fo(i,x,y) for(int i=x;i<=y;i++)
using namespace std;

ll n,ar[N],sum,m;

lli p[N];

bool check(int x)
{
	if(x==0)
		return 1;

	int q=m;

	for(int i=n;i>=1 && q>m-x;i--)
	{
		if(p[i].se<=ar[q])
			q--;
		// cout<<q<<sp<<p[i].se<<sp<<ar[q]<<endl;
	}
	// cout<<q<<sp;
	if(q==m-x)
		return true;
	return false;
}


int main()
{
  fast;
  cin>>n>>m;
  fo(i,1,n)
    cin>>p[i].se>>p[i].fi;
  sort(p+1,p+n+1);
  fs(ar,m)
  // cout<<endl;
  sort(ar+1,ar+m+1);
  // fo(i,1,m)
  // 	cout<<ar[i]<<sp;
  // 	cout<<endl;
  int l=0,r=min(m,n);
  // fo(i,1,n)
  // cout<<p[i].se<<sp;
  // cout<<endl;
  while(l<r)
  {
    if(r-l==1)
    {
      if(check(r))
        l=r;

      break;
    }
    // cout<<endl;
    int mid=(l+r)/2;
    // cout<<mid<<sp<<check(mid)<<endl;
    if(check(mid))
      l=mid;
    else
      r=mid-1;
  }
  cout<<l;
}

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