Submission #880508

#	Time	Username	Problem	Language	Result	Execution time	Memory
880508		kh0i	trapezoid (balkan11_trapezoid)	C++17	100 / 100	101 ms	21428 KiB

trapezoid

#include "bits/stdc++.h"
using namespace std;

#ifdef LOCAL
#include "debug.h"
#else
#define debug(...)
#endif

using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;   

#define F first
#define S second
#define sz(x) (int)((x).size())
#define all(x) (x).begin(), (x).end()

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
ll get_rand(ll l, ll r) {
    assert(l <= r);
    return uniform_int_distribution<ll> (l, r)(rng);
}

const ll mod = 30013;

struct Trapezoid{
    int a, b, c, d;
    bool operator < (const Trapezoid &o){ return a < o.a; }
};

pll combine(const pll &A, const pll &B){
    pll res;
    res.F = max(A.F, B.F);
    if(A.F == B.F) res.S = (A.S + B.S) % mod;
    else if(A.F < B.F) res.S = B.S;
    else res.S = A.S;
    return res;
}

struct SegTri{
    vector<pll> st;
    int n;

    void init(int _n){
        n = _n;
        st.resize(4 * n + 6, {0, 0});
    } 

    void _update(int id, int l, int r, int pos, pll val){
        if(l == r){
            st[id] = combine(st[id], val);
            return;
        }
        int mid = (l + r) / 2;
        if(pos <= mid)
            _update(2 * id, l, mid, pos, val);
        else
            _update(2 * id + 1, mid + 1, r, pos, val);
        st[id] = combine(st[2 * id], st[2 * id + 1]);
    }

    pll _get(int id, int l, int r, int tl, int tr){
        if(l > tr or tl > r)
            return {0, 0};
        if(tl <= l and r <= tr)
            return st[id];
        int mid = (l + r) / 2;
        return combine(_get(2 * id, l, mid, tl, tr), _get(2 * id + 1, mid + 1, r, tl, tr));
    }

    void update(int pos, pll val){
        _update(1, 1, n, pos, val);
    }

    pll get(int l, int r){
        if(l > r)
            return {0, 0};
        return _get(1, 1, n, l, r);
    }
} dak;

const int N = 1e5 + 3;

int n;
vector<Trapezoid> tr;
vector<pair<Trapezoid, int>> tr_b;
vector<int> xx = {0};
pll f[N];

void solve(){
    cin >> n;
    for(int i = 1; i <= n; ++i){
        int a, b, c, d;
        cin >> a >> b >> c >> d;
        tr.push_back({a, b, c, d});
        xx.push_back(c);
        xx.push_back(d);
    }

    sort(all(xx));
    xx.resize(unique(all(xx)) - xx.begin());
    sort(all(tr));
    for(auto &[a, b, c, d] : tr){
        c = lower_bound(all(xx), c) - xx.begin() + 1;
        d = lower_bound(all(xx), d) - xx.begin() + 1;
    }

    for(int i = 0; i < sz(tr); ++i)
        tr_b.push_back({tr[i], i});

    sort(all(tr_b), [](const pair<Trapezoid, int> &A, const pair<Trapezoid, int> &B) -> bool {
        return A.F.b < B.F.b;
    });

    dak.init(sz(xx) + 2);
    dak.update(1, {0, 1});

    int cur = 0;
    for(int i = 0; i < sz(tr); ++i){
        debug(tr[i].a, tr[i].b, tr[i].c, tr[i].d);
        while(cur < i and tr_b[cur].F.b < tr[i].a){
            dak.update(tr_b[cur].F.d, f[tr_b[cur].S]);
            ++cur;
        };
        f[i] = dak.get(1, tr[i].c - 1);
        f[i].F += 1;
        debug(i, f[i]);
    }

    pll res = {0, 1};
    for(int i = 0; i < sz(tr); ++i)
        res = combine(res, f[i]);
    cout << res.F << ' ' << res.S << '\n';
}

int32_t main() {
    cin.tie(nullptr)->sync_with_stdio(0);
    #define task "troll"
    if(fopen(task".inp", "r")){
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }
    int test = 1;
//    cin >> test;
    for(int i = 1; i <= test; ++i){
//        cout << "Case #" << i << ": ";
        solve();
    }
    #ifdef LOCAL
        cerr << "\n[Time]: " << 1000.0 * clock() / CLOCKS_PER_SEC << " ms.\n";
    #endif
    return 0;
}

Compilation message (stderr)

trapezoid.cpp: In function 'int32_t main()':
trapezoid.cpp:141:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  141 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
trapezoid.cpp:142:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  142 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 100 / 100