Submission #285460

#	Time	Username	Problem	Language	Result	Execution time	Memory
285460		leductoan	Exhibition (JOI19_ho_t2)	C++14	100 / 100	62 ms	4600 KiB

joi2019_ho_t2

#include<bits/stdc++.h>
using namespace std;
#define task "JOI19_ho_t2"
#define lb lower_bound
#define ub upper_bound
#define ALL(v) (v).begin(),(v).end()
#define zs(v) int((v).size())
#define fi first
#define se second
#define pb push_back
#define mp make_pair
typedef long double ld;
typedef long long ll;
typedef pair<int,int> pii;
const int d4i[4]={-1, 0, 1, 0}, d4j[4]={0, 1, 0, -1};
const int d8i[8]={-1, -1, 0, 1, 1, 1, 0, -1}, d8j[8]={0, 1, 1, 1, 0, -1, -1, -1};
const ll mod=1000000007; /// 998244353
const int base=311;
const int N=1e5+5;

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

void biot()
{
    cin>>n>>m;
    for(int i=1;i<=n;++i) cin>>a[i].se>>a[i].fi;
    for(int i=1;i<=m;++i) cin>>b[i];
    sort(a+1,a+n+1);
    sort(b+1,b+m+1);
    int i=n, j=m,ans=0;
    while(i>=1&&j>=1)
    {
        if(a[i].se<=b[j])
        {
            --i;
            --j;
            ++ans;
            continue;
        }
        --i;
    }
    cout<<ans;
}
int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);
    if(fopen(task".inp","r"))
    {
        freopen(task".inp","r",stdin);
        freopen(task".out","w",stdout);
    }
    biot();
}

Compilation message (stderr)

joi2019_ho_t2.cpp: In function 'int main()':
joi2019_ho_t2.cpp:50:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   50 |         freopen(task".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t2.cpp:51:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   51 |         freopen(task".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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