Submission #1043630

#	Time	Username	Problem	Language	Result	Execution time	Memory
1043630		Minbaev	Exhibition (JOI19_ho_t2)	C++17	100 / 100	35 ms	5732 KiB

joi2019_ho_t2

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp> 
 
#pragma GCC target("avx,avx2,fma")
#pragma GCC optimize("Ofast,unroll-loops")
 
using namespace std;
using namespace __gnu_pbds;
 
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define f first
#define s second
#define int long long
#define ll long long
#define pii pair<int,int>
#define ar array
 
template<class T>bool umax(T &a,T b){if(a<b){a=b;return true;}return false;}
template<class T>bool umin(T &a,T b){if(b<a){a=b;return true;}return false;}
 
typedef tree<int, null_type, less_equal<int>, rb_tree_tag,
 tree_order_statistics_node_update> ordered_set;
 
const int inf = 1e17 + 7;
const int mod = 1e9 + 7;
const int N = 3e5 + 5;
const int md = 998244353;
 
int binpow(int a, int b){
	if(b == 0)return 1;
	if(b % 2 == 0){
		int c = binpow(a,b/2);
		return (c*c)%mod;
	}
	return (binpow(a,b-1)*a)%mod;
}
 
int divi(int a, int b){
	return (a*(binpow(b,mod-2)))%mod;
}
 
int n,m,k;
 
void solve(){
	
	cin >> n >> m;
	vector<array<int,2>>v(n);
	vector<int>vs(m);
	
	for(auto &to:v)cin >> to[1] >> to[0];
	for(auto &to:vs)cin >> to;
	
	sort(all(v));
	sort(all(vs));
	
	//~ for(auto to:v)cout << to[0] << " " << to[1] << "\n";
	
	int r = n-1, ans = 0;
	for(int i = m-1;i>=0;i--){
		while(r >= 0 && v[r][1] > vs[i]){
			r -= 1;
		}
		if(r >= 0){ans += 1;r -= 1;}
	}
	
	cout << ans << "\n";
	
}
/*
 
*/
 signed main()
{
//	freopen("seq.in", "r", stdin);
//  freopen("seq.out", "w", stdout);
	ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL);
	int tt=1;//cin>>tt;
	while(tt--)solve();
 
}
 

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