Submission #1101388

#	Time	Username	Problem	Language	Result	Execution time	Memory
1101388		NoLove	trapezoid (balkan11_trapezoid)	C++14	0 / 100	177 ms	48984 KiB

trapezoid

/**
 *    author : Lăng Trọng Đạt
 *    created: 16-10-2024 
**/
#include <bits/stdc++.h>
using namespace std;
#ifndef LANG_DAT
#define db(...) ;
#endif // LANG_DAT
#define int long long
#define mp make_pair
#define f first
#define se second
#define pb push_back
#define all(v) (v).begin(), (v).end()
#define FOR(i, a, b) for (int i = (a); (i) <= (b); (i++))
#define FD(i, lo, up) for (int i = (up); (i) >= (lo); i--)
#define si(x) (int)(x.size())
bool mx(int& a, int b) { if (b > a) {a = b; return true;} return false;}
bool mi(int& a, int b) { if (b < a) {a = b; return true;} return false;}
using pii = pair<int, int>;
const int INF = 1e18 + 5;
const int MOD = 1e9 + 7;

const int N = 1e6 + 5;
int g[N];
int n, m, k, q, a, b, c, d;

vector<int> vals = {-1, MOD};

struct Data
{
    vector<int> v;
} t[N];

int res[N];
int bit_max[4*N];
void upd_max(int p, int val) {
    for (; p <= si(vals); p += p & -p) 
        mx(bit_max[p], val);
}
int get_max(int p) {
    int res = 0;
        for (; p > 0; p -= p & -p) 
            mx(res, bit_max[p]);
    return res;
}

int32_t main() {
    cin.tie(0)->sync_with_stdio(0);
    if (fopen("hi.inp", "r")) {
        freopen("hi.inp", "r", stdin);
//        freopen("hi.out", "w", stdout);
    } 

    cin >> n;

    vector<array<int, 3>> events;
    FOR(i, 1, n) {
        t[i].v.resize(4);
        for (int& j : t[i].v) {
            cin >> j;
            vals.push_back(j);
        }
        // cin >> t[i].a >> t[i].b >> t[i].c >> t[i].d;
        // vals.push_back(t[i].a); vals.push_back(t[i].b); vals.push_back(t[i].c); vals.push_back(t[i].d);
        events.push_back({t[i].v[0], 0, i});
        events.push_back({t[i].v[1], 1, i});
    }

    sort(all(events));
    sort(all(vals));
    vals.resize(unique(all(vals)) - vals.begin());

    for(auto[x, type, ind] : events) {
        vector<int> v = t[ind].v;
        for (int& i : v) {
            i = lower_bound(all(vals), i) - vals.begin();
        }
        db(x, v[2], v[3])
        if (type == 0) {
            res[ind] = get_max(v[2]) + 1;
        } else {
            upd_max(v[3], res[ind]);
        }
    }

    cout << get_max(si(vals)) << " ";
}

Compilation message (stderr)

trapezoid.cpp: In function 'int32_t main()':
trapezoid.cpp:75:13: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   75 |     for(auto[x, type, ind] : events) {
      |             ^
trapezoid.cpp:52:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |         freopen("hi.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 100