Submission #890558

#	Time	Username	Problem	Language	Result	Execution time	Memory
890558		thunopro	Exhibition (JOI19_ho_t2)	C++14	0 / 100	2 ms	2396 KiB

joi2019_ho_t2

#include<bits/stdc++.h>
using namespace std ;
#define maxn 200009 
#define ll long long
#define fi first 
#define se second 
#define pb push_back 
#define left id<<1
#define right id<<1|1 
#define re exit(0); 

const int mod = 1e9+7 ; 
const int INF = 1e9 ; 
const int LOG = 18 ; 

typedef vector<int> vi ; 
typedef vector<ll> vl ; 
typedef pair<int,int> pii ; 
typedef vector<pii> vii ; 
typedef pair<ll,ll> pll ;  

void add ( int &a , int b ) 
{
	a += b ; 
	if ( a < 0 ) a += mod ; 
	if ( a >= mod ) a -= mod ; 
}

template < typename T > void chkmin (T &a , T b) { if (a>b) a=b ;} 
template < typename T > void chkmax (T &a , T b) { if (a<b) a=b ;}

void rf () 
{
	freopen ("bai1.inp","r",stdin) ; 
//	freopen ("bai1.out","w",stdout) ; 
}

int _pow ( int a , int n ) 
{
	if ( n == 0 ) return 1 ; 
	int res = _pow(a,n/2) ;
	if ( n % 2 ) return (1ll*res*res%mod*a%mod) ; 
	else return 1ll*res*res%mod ; 
}

int n , m ; 
pii a [maxn] ; 
int b [maxn] ; 

bool cmp ( pii u , pii v ) 
{
	if ( u.se == v.se ) return u.fi > v.fi ; 
	else return u.se > v.se ; 
}
int main () 
{
	ios_base::sync_with_stdio(0) ; 
	cin.tie(0) ; cout.tie(0) ; 
//	rf () ; 
	cin >> n >> m ; 
	for ( int i = 1 ; i <= n ; i ++ ) cin >> a [i].fi >> a [i].se ; 
	for ( int i = 1 ; i <= m ; i ++ ) cin >> b [i] ; 
	
	sort (a+1,a+n+1,cmp) ; 
	sort (b+1,b+m+1,greater<int>()) ; 
	
	int res = 0 ; 
	int j = 1 ; 
	for ( int i = 1 ; i <= m ; i ++ ) 
	{
		if ( j <= n && a [j].fi <= b [i] ) res ++ , j ++ ; 
	}
	cout << res ; 
}

Compilation message (stderr)

joi2019_ho_t2.cpp: In function 'void rf()':
joi2019_ho_t2.cpp:34:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   34 |  freopen ("bai1.inp","r",stdin) ;
      |  ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 40
• Subtask 3: 0 / 50