Submission #1310324

#	Time	Username	Problem	Language	Result	Execution time	Memory
1310324		_Temirhan	Exhibition (JOI19_ho_t2)	C++20	0 / 100	2 ms	572 KiB

joi2019_ho_t2

#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>  
#include <ext/pb_ds/assoc_container.hpp>

using namespace std;
using namespace __gnu_pbds;

#if defined(__GNUC__) || defined(__clang__)
#pragma GCC optimize("Ofast,unroll-loops,inline-functions,no-stack-protector,03")
#pragma GCC target ("sse,sse2,sse3,ssse3,sse4,popcnt,abm,avx2,mmx,fma,avx,tune=native")
#pragma clang loop vectorize(enable)
#pragma clang loop interleave(enable)
#endif

#define int long long
#define sz(x) (int)x.size()
#define F first
#define S second
#define pb push_back
#define nl '\n'
#define o_set tree<int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update>
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
typedef pair<int, int> pii;

void file( string s = "" )
{
    if( s.empty() )
        return;
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}

const int N = 2e5 + 2;
const int N1 = 1e6 + 2;
const int inf = 1e9 + 2;
const int INF = 1e18 + 2;
const int mod = 1e9 + 7;
int T = 1;

void solve()
{
    int n, m;
    cin >>n >>m;
    pii p[n + 1];
    int c[m + 1];
    for( int i = 1; i <= n; ++i )
        cin >>p[i].F >>p[i].S;
    for( int i = 1; i <= m; ++i )
        cin >>c[i];
    sort(p + 1, p + n + 1);
    sort(c + 1, c + m + 1);
    int ans = 0, last = INF;
    for( int i = n, j = m; j >= 1 && i >= 1; --j )
    {
        while( i > 1 && (p[i].F > c[j] || p[i].S > last) )
            --i;
        if( p[i].F <= c[j] && p[i].S <= last )
        {
            ++ans;
            last = p[i].S;
        }
    }
    cout <<ans;
}

signed main()
{
    file("");
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    // cin >>T;
    while( T-- )
        solve();
}

Compilation message (stderr)

joi2019_ho_t2.cpp: In function 'void file(std::string)':
joi2019_ho_t2.cpp:29:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t2.cpp:30:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 40
• Subtask 3: 0 / 50