Submission #334827

#	Time	Username	Problem	Language	Result	Execution time	Memory
334827		VROOM_VARUN	trapezoid (balkan11_trapezoid)	C++14	100 / 100	352 ms	47956 KiB

trapezoid

/*
ID: varunra2
LANG: C++
TASK: trapezoids
*/

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

#ifdef DEBUG
#include "lib/debug.h"
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#define debug_arr(...) \
  cerr << "[" << #__VA_ARGS__ << "]:", debug_arr(__VA_ARGS__)
#pragma GCC diagnostic ignored "-Wsign-compare"
//#pragma GCC diagnostic ignored "-Wunused-parameter"
//#pragma GCC diagnostic ignored "-Wunused-variable"
#else
#define debug(...) 42
#endif

#define EPS 1e-9
#define IN(A, B, C) assert(B <= A && A <= C)
#define INF (int)1e9
#define MEM(a, b) memset(a, (b), sizeof(a))
#define MOD 30013
#define MOD1 1000000007
#define MP make_pair
#define PB push_back
#define all(cont) cont.begin(), cont.end()
#define rall(cont) cont.end(), cont.begin()
#define x first
#define y second

const double PI = acos(-1.0);
typedef long long ll;
typedef long double ld;
typedef pair<int, int> PII;
typedef map<int, int> MPII;
typedef multiset<int> MSETI;
typedef set<int> SETI;
typedef set<string> SETS;
typedef vector<int> VI;
typedef vector<PII> VII;
typedef vector<VI> VVI;
typedef vector<string> VS;

#define rep(i, a, b) for (int i = a; i < (b); ++i)
#define trav(a, x) for (auto& a : x)
#define sz(x) (int)(x).size()
typedef pair<int, int> pii;
typedef vector<int> vi;
#pragma GCC diagnostic ignored "-Wsign-compare"
// util functions

int n;
VVI vals;
MPII cmp;
VI dp1;
VI dp2;

int siz;

void compress(VI& use) {
  sort(all(use));
  use.resize(unique(all(use)) - use.begin());
  rep(i, 0, sz(use)) cmp[use[i]] = i;
  siz = sz(use);
}

void init() {
  vals.resize(n);
  dp1.resize(n);
  dp2.resize(n);
}

void upd(PII& cur, PII& nw) {
  if (nw.x > cur.x)
    cur = nw;
  else if (nw.x == cur.x)
    cur.y += nw.y;
}

PII comb(PII a, PII b) {
  if (a.x > b.x) return a;
  if (b.x > a.x) return b;
  return MP(a.x, (a.y + b.y) % MOD);
}

const PII bad(0, 0);

struct segtree {
  int n;
  VII st;

  void init(int _n) {
    n = _n;
    st.assign(4 * n, bad);
  }

  PII qry(int tl, int tr, int l, int r, int node) {
    if (l > r) return bad;
    if (tl > r or tr < l) return bad;
    if (tl <= l and tr >= r) return st[node];
    int mid = (l + r) / 2;
    return comb(qry(tl, tr, l, mid, 2 * node + 1),
                qry(tl, tr, mid + 1, r, 2 * node + 2));
  }

  void upd(int ind, PII val, int l, int r, int node) {
    if (ind < l or ind > r) return;
    if (ind == l and ind == r) {
      ::upd(st[node], val);
      return;
    }
    int mid = (l + r) / 2;
    upd(ind, val, l, mid, 2 * node + 1);
    upd(ind, val, mid + 1, r, 2 * node + 2);
    st[node] = comb(st[2 * node + 1], st[2 * node + 2]);
  }

  PII qry(int l, int r) {
    auto ret = qry(l, r, 0, n - 1, 0);
    // debug(l, r, ret);
    return ret;
  }

  void upd(int ind, int val, int cnt) {
    // debug(ind, val, cnt);
    upd(ind, MP(val, cnt), 0, n - 1, 0);
  }
} st;

int main() {
  // #ifndef ONLINE_JUDGE
  // freopen("trapezoids.in", "r", stdin);
  // freopen("trapezoids.out", "w", stdout);
  // #endif
  cin.sync_with_stdio(0);
  cin.tie(0);

  cin >> n;

  init();

  VI pnts;

  for (int i = 0; i < n; i++) {
    vals[i].resize(4);
    for (int j = 0; j < 4; j++) {
      cin >> vals[i][j];
      pnts.PB(vals[i][j]);
    }
  }

  compress(pnts);

  st.init(siz);

  VVI sweep;

  for (int i = 0; i < n; i++) {
    int a, b, c, d;
    a = vals[i][0], b = vals[i][1], c = vals[i][2], d = vals[i][3];
    sweep.PB({a, c, i, 0});
    sweep.PB({b, d, i, 1});
  }

  sort(all(sweep));

  // trav(x, sweep) debug(x);

  int ret = -1, cnt = 0;

  trav(x, sweep) {
    int a = x[0];
    int b = x[1];
    int ind = x[2];
    int type = x[3];
    if (type == 0) {
      tie(dp1[ind], dp2[ind]) = st.qry(0, cmp[b]);
      dp1[ind]++;
      if (dp1[ind] == 1) dp2[ind] = 1;
      if (dp1[ind] > ret) ret = dp1[ind], cnt = 0;
      if (dp1[ind] == ret) cnt = (cnt + dp2[ind]) % MOD;
    }
    if (type == 1) {
      st.upd(cmp[b], dp1[ind], dp2[ind]);
    }
  }

  // debug(dp1);

  cout << ret << " " << cnt << '\n';

  return 0;
}

Compilation message (stderr)

trapezoid.cpp: In function 'int main()':
trapezoid.cpp:176:9: warning: unused variable 'a' [-Wunused-variable]
  176 |     int a = x[0];
      |         ^

• Subtask 1: 100 / 100