Submission #293415

#	Time	Username	Problem	Language	Result	Execution time	Memory
293415		BeanZ	Exhibition (JOI19_ho_t2)	C++14	100 / 100	56 ms	5632 KiB

joi2019_ho_t2

#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define endl '\n'
const int N = 1e5 + 5;
pair<ll, ll> a[N];
ll b[N];
int main(){
        ios_base::sync_with_stdio(false);
        cin.tie(0);
        if (fopen("balance.in", "r")){
                freopen("balance.in", "r", stdin);
                freopen("balance.out", "w", stdout);
        }
        ll n, m;
        cin >> n >> m;
        for (int i = 1; i <= n; i++){
                ll s, v;
                cin >> s >> v;
                a[i] = {v, s};
        }
        sort(a + 1, a + n + 1);
        for (int i = 1; i <= m; i++) cin >> b[i];
        sort(b + 1, b + m + 1);
        ll now = m;
        ll ans = 0;
        for (int i = n; i >= 1; i--){
                if (a[i].second <= b[now]){
                        ans++;
                        now--;
                }
        }
        cout << ans;
}
/*
*/

Compilation message (stderr)

joi2019_ho_t2.cpp: In function 'int main()':
joi2019_ho_t2.cpp:14:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   14 |                 freopen("balance.in", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t2.cpp:15:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   15 |                 freopen("balance.out", "w", stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

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