Submission #771349

#	Time	Username	Problem	Language	Result	Execution time	Memory
771349		raysh07	Exhibition (JOI19_ho_t2)	C++17	100 / 100	49 ms	2508 KiB

joi2019_ho_t2

#include <bits/stdc++.h>
using namespace std;
//#define int long long
#define INF (int)1e18
#define f first
#define s second

mt19937_64 RNG(chrono::steady_clock::now().time_since_epoch().count());

int n, m;
vector <int> c;
vector <pair<int, int>> a;
vector <int> num;

bool check(int y){
    int dp = 0;
    // for (auto x : a){
    //     int num = c.end() - lower_bound(c.begin(), c.end(), x.s);
    //     if (num >= y - dp) dp++;
    // }
    
    for (auto x : num){
        if (x >= y - dp) dp++;
    }
    
    return dp >= y;
}

void Solve() 
{
    cin >> n >> m;
    
    a.resize(n);
    c.resize(m);
    for (auto &x : a) cin >> x.s >> x.f;
    sort(a.begin(), a.end());
    num.resize(n);
    
    for (auto &x : c) cin >> x;
    sort(c.begin(), c.end());
    
    for (int i = 0; i < n; i++){
        num[i] = c.end() - lower_bound(c.begin(), c.end(), a[i].s);
    }
    
    int l = 0, r = n;
    while (l != r){
        int mid = (l + r + 1) / 2;
        if (check(mid)) l = mid;
        else r = mid - 1;
    }
    
    cout << l << "\n";
}

int32_t main() 
{
    auto begin = std::chrono::high_resolution_clock::now();
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int t = 1;
 //   cin >> t;
    for(int i = 1; i <= t; i++) 
    {
        //cout << "Case #" << i << ": ";
        Solve();
    }
    auto end = std::chrono::high_resolution_clock::now();
    auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin);
    cerr << "Time measured: " << elapsed.count() * 1e-9 << " seconds.\n"; 
    return 0;
}

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