Submission #1151007

#	Time	Username	Problem	Language	Result	Execution time	Memory
1151007		nguyn	Exhibition (JOI19_ho_t2)	C++20	100 / 100	51 ms	1608 KiB

joi2019_ho_t2

#include <bits/stdc++.h>
using namespace std;

#define ll long long 
#define F first
#define S second
#define pb push_back 
#define pii pair<int,int>

const int N = 1e5 + 5;

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

signed main(){
    ios_base::sync_with_stdio(false) ; 
    cin.tie(0) ; cout.tie(0) ; 
    if (fopen("INP.INP" ,"r")) {
        freopen("INP.INP" ,"r" , stdin) ;
        freopen("OUT.OUT" , "w" , stdout) ;
    }
    cin >> n >> m;
    for (int i = 1; i <= n; i++) {
    	cin >> a[i].S >> a[i].F; 
    }
    sort(a + 1, a + 1 + n); 
    for (int i = 1; i <= m; i++) {
    	cin >> b[i]; 
    }
    sort(b + 1, b + 1 + m); 
    int j = m;
    for (int i = n; i >= 1; i--) {
    	if (j && a[i].S <= b[j]) {
    		j--;
    	}
    }	
    cout << m - j; 
}

Compilation message (stderr)

joi2019_ho_t2.cpp: In function 'int main()':
joi2019_ho_t2.cpp:20:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |         freopen("INP.INP" ,"r" , stdin) ;
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t2.cpp:21:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |         freopen("OUT.OUT" , "w" , stdout) ;
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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