Submission #1023843

#	Time	Username	Problem	Language	Result	Execution time	Memory
1023843		vjudge1	Exhibition (JOI19_ho_t2)	C++17	100 / 100	44 ms	4688 KiB

joi2019_ho_t2

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define fi first
#define se second
#define task "code"
 
const int ar=1e5+5;
const ll mod=1e9+7;
int n,m;
pair<int,int> pic[ar];
int c[ar];
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    if (fopen(task".inp","r"))
    {
        freopen(task".inp","r",stdin);
        freopen(task".out","w",stdout);
    }
    cin>>n>>m;
    for (int i=1;i<=n;i++)
    {
        cin>>pic[i].se>>pic[i].fi;
    }
    for (int i=1;i<=m;i++)
    {
        cin>>c[i];
    }
    sort(c+1,c+m+1);
    sort(pic+1,pic+n+1);
    int ans=0;
    int pos=m;
    for (int i=n;i>=1;i--)
    {
        int s=pic[i].se;
        if (c[pos]>=s) ans++,pos--;
        if (ans==m) return cout<<m,0;
    }
    cout<<ans;
}

Compilation message (stderr)

joi2019_ho_t2.cpp: In function 'int main()':
joi2019_ho_t2.cpp:19:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |         freopen(task".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
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(task".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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