Submission #727036

#	Time	Username	Problem	Language	Result	Execution time	Memory
727036		Bogdan1110	Exhibition (JOI19_ho_t2)	C++14	100 / 100	61 ms	4800 KiB

joi2019_ho_t2

#include <bits/stdc++.h>
#define FAST {ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);}
#define FILES {freopen("input.txt", "r", stdin);freopen("output.txt", "w", stdout);}
#define ll long long
#define ull unsigned long long
#define pqueue priority_queue
#define pb push_back
#define fi first
#define se second
#define ld long double
#define pii pair<int,int>
#define pll pair<long long,long long>
#define all(a) (a).begin(), (a).end()
#define mp make_pair 
using namespace std;
// order_of_key -> # less than k
// find_by_order -> k-th element
// pq max element
 
void files() {
    #ifndef ONLINE_JUDGE
        freopen("input.txt", "r", stdin);
        freopen("output.txt", "w", stdout);
    #endif
}

const double eps = 0.00000001;
const int NMAX = 100010;
const ll inf = LLONG_MAX/3;
const ll modi = 998244353;

void solve() {
    int n,m;
    cin >> n >> m;
    
    vector<pii>v(n);
    vector<int>c(m,0);

    for (int i = 0; i < n ; i++ ) {
        cin >> v[i].se >> v[i].fi;
    }

    sort(all(v));

    for (int i = 0 ; i < m ; i++ ) {
        cin >> c[i];
    }

    sort(all(c));

    vector<int>res(n+1,INT_MAX);
    int cnt = m-1;
    for (int i = n-1 ; i >=0 ; i-- ) {
        if ( cnt < 0 ) break;
        if ( c[cnt] >= v[i].se ) {
            //cout << c[cnt] << ' ' << v[i].fi << ' ' << v[i].se << endl;
            cnt--;
        }
    }

    cout << m - cnt -1 << endl;

}

int main () { 
    FAST

    int t=1;

    /*
    cin >> t;
    //*/

    int i = 1;
    while(t--) {
        //cout << "Case #" << i++ << ": " ;
        solve();
    }
}  

Compilation message (stderr)

joi2019_ho_t2.cpp: In function 'int main()':
joi2019_ho_t2.cpp:74:9: warning: unused variable 'i' [-Wunused-variable]
   74 |     int i = 1;
      |         ^
joi2019_ho_t2.cpp: In function 'void files()':
joi2019_ho_t2.cpp:22:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |         freopen("input.txt", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t2.cpp:23:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         freopen("output.txt", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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