Submission #1121454

#	Time	Username	Problem	Language	Result	Execution time	Memory
1121454		joelgun14	Game (IOI13_game)	C++17	80 / 100	4496 ms	256000 KiB

game

#include <bits/stdc++.h>
#include "game.h"
#pragma GCC optimize("O2")
#define ll long long
#define mp make_pair
#define ins insert
#define lb lower_bound
#define pb push_back
#define ub upper_bound
#define fi first
#define se second
using namespace std;
const int lim = 1e9 + 5;
long long gcd2(long long X, long long Y) {
  long long tmp;
  while (X != Y && Y != 0) {
    tmp = X;
    X = Y;
    Y = tmp % Y;
  }
  return X;
}
struct nodex {
  int l = -1, r = -1, nx = -1;
};
struct nodey {
  int l = -1, r = -1;
  ll val = 0;
};
const int lim2 = 2.2e7;
struct segtree {
  vector<nodex> vx;
  vector<nodey> vy;
  segtree() {
    vx.pb(nodex());
    vx.pb(nodex());
    vx.reserve(lim2);
    vy.reserve(lim2);
  }
  int add_nodex() {
    vx.pb(nodex());
    return (int)vx.size() - 1;
  }
  int add_nodey() {
    vy.pb(nodey());
    return (int)vy.size() - 1;
  }
  void update_node(int nd) {
    vy[nd].val = 0;
    if(vy[nd].l != -1)
      vy[nd].val = gcd2(vy[vy[nd].l].val, vy[nd].val);
    if(vy[nd].r != -1)
      vy[nd].val = gcd2(vy[vy[nd].r].val, vy[nd].val);
  }
  void update_x(int x, int y, ll val) {
    int nd = 1, cl = 0, cr = lim - 1;
    vector<int> nodes = {nd};
    while(cl < cr) {
      int mid = (cl + cr) >> 1;
      if(x <= mid) {
        cr = mid;
        if(vx[nd].l == -1)
          vx[nd].l = add_nodex();
        nd = vx[nd].l;
      }
      else {
        cl = mid + 1; 
        if(vx[nd].r == -1)
          vx[nd].r = add_nodex();
        nd = vx[nd].r;
      }
      nodes.pb(nd);
    }
    reverse(nodes.begin(), nodes.end());
    // from smallest to largest
    for(auto x : nodes) {
      if(vx[x].nx == -1)
        vx[x].nx = add_nodey();
      update_y(vx[x].nx, x, y, val);
    }
  }
  void update_y(int nd, int ndx, int y, ll val) {
    int cl = 0, cr = lim - 1;
    vector<int> nodes = {nd};
    while(cl < cr) {
      int mid = (cl + cr) >> 1;
      if(y <= mid) {
        cr = mid;
        if(vy[nd].l == -1)
          vy[nd].l = add_nodey();
        nd = vy[nd].l;
      }
      else {
        cl = mid + 1; 
        if(vy[nd].r == -1)
          vy[nd].r = add_nodey();
        nd = vy[nd].r;
      }
      nodes.pb(nd);
    }
    nodes.pop_back();
    reverse(nodes.begin(), nodes.end());
    if(vx[ndx].l == -1 && vx[ndx].r == -1)
      vy[nd].val = val;
    else {
      // take from v[ndx].l and v[ndx].r
      vy[nd].val = gcd2(vx[ndx].l != -1 ? query_y(vx[vx[ndx].l].nx, 0, lim - 1, y, y) : 0, vx[ndx].r != -1 ? query_y(vx[vx[ndx].r].nx, 0, lim - 1, y, y) : 0);
    }
    for(auto x : nodes) {
      // cerr << "UPDATE " << x << endl;
      update_node(x);
    }
  }
  ll query_x(int nd, int cl, int cr, int l, int r, int y1, int y2) {
    if(nd == -1 || cl > r || cr < l)
      return 0;
    else if(cl >= l && cr <= r) {
      // cerr << "GET Y " << cl << " " << cr << endl;
      // cerr << l << " " << r << " " << y1 << " " << y2 << endl;
      return query_y(vx[nd].nx, 0, lim - 1, y1, y2);
    }
    else {
      int mid = (cl + cr) >> 1;
      return gcd2(query_x(vx[nd].l, cl, mid, l, r, y1, y2), query_x(vx[nd].r, mid + 1, cr, l, r, y1, y2));
    }
  }
  ll query_y(int nd, int cl, int cr, int l, int r) {
    if(nd == -1 || cl > r || cr < l)
      return 0;
    else if(cl >= l && cr <= r) {
      // cerr << "GOT Y " << nd << " " << cl << " " << cr << " " << v[nd].val << endl;
      return vy[nd].val;
    } 
    else {
      int mid = (cl + cr) >> 1;
      return gcd2(query_y(vy[nd].l, cl, mid, l, r), query_y(vy[nd].r, mid + 1, cr, l, r));
    }
  }
};
segtree seg;
void init(int R, int C) {
}

void update(int P, int Q, long long K) {
  seg.update_x(P, Q, K);
}

long long calculate(int P, int Q, int U, int V) {
  // cerr << "QUERY " << endl;
  return seg.query_x(1, 0, lim - 1, P, U, Q, V);
}

• Subtask 1: 10 / 10
• Subtask 2: 27 / 27
• Subtask 3: 26 / 26
• Subtask 4: 17 / 17
• Subtask 5: 0 / 20