Submission #110908

#	Time	Username	Problem	Language	Result	Execution time	Memory
110908		Just_Solve_The_Problem	Seats (IOI18_seats)	C++11	5 / 100	4099 ms	57212 KiB

seats

#include <bits/stdc++.h>
#include "seats.h"
 //#include "grader.cpp"
 
#define pii pair < int, int >
#define fr first
#define sc second
#define mk make_pair
#define OK puts("ok");
#define ll long long
 
using namespace std;
 
const int N = (int)1e6 + 7;
const int inf = (int)1e9 + 7;
 
int n;
 
inline int min(const int &a, const int &b) {
	return (a < b) ? a : b;
}
 
inline int max(const int &a, const int &b) {
	return (a < b) ? b : a;
}
 
struct T {
	int tree[2][4 * N];
	T () {		
	}
	void build(int v, int l, int r, vector <int> &V) {
		if (l == r) {
			tree[0][v] = tree[1][v] = V[l - 1];
			return ;
		}
		int mid = (l + r) >> 1;
		build(v + v, l, mid, V);
		build(v + v + 1, mid + 1, r, V);
		tree[0][v] = min(tree[0][v + v], tree[0][v + v + 1]);
		tree[1][v] = max(tree[1][v + v], tree[1][v + v + 1]);
	} 
	void upd(int pos, int val, int v = 1, int tl = 1, int tr = n) {
		if (tl == tr) {
			tree[0][v] = tree[1][v] = val;
			return ;
		}
		int mid = (tl + tr) >> 1;
		if (pos <= mid) {
			upd(pos, val, v + v, tl, mid);
		} else {
			upd(pos, val, v + v + 1, mid + 1, tr);
		}
		tree[0][v] = min(tree[0][v + v], tree[0][v + v + 1]);
		tree[1][v] = max(tree[1][v + v], tree[1][v + v + 1]);
	}
	pair < int, int > get(int l, int r, int v = 1, int tl = 1, int tr = n) {
		if (tl > r || tr < l) return make_pair(inf, 0);
		if (l <= tl && tr <= r) return make_pair(tree[0][v], tree[1][v]);
		int mid = (tl + tr) >> 1;
		pair < int, int > tp1, tp2;
		tp1 = get(l, r, v + v, tl, mid);
		tp2 = get(l, r, v + v + 1, mid + 1, tr);
		return make_pair(min(tp1.first, tp2.first), max(tp1.second, tp2.second));
	}
};
T tr[2];
 
int h, w;
int ans;
int r[N], c[N];
 
void give_initial_chart(int H, int W, vector<int> R, vector<int> C) {
  h = H;
  w = W;
  n = h * w;
  tr[0].build(1, 1, n, R);
  tr[1].build(1, 1, n, C);
  for (int i = 0; i < n; i++) {
		c[i + 1] = C[i];
		r[i + 1] = R[i];
  }
}
 
int swap_seats(int a, int b) {
	a++; b++;
  swap(r[a], r[b]);
  swap(c[a], c[b]);
  tr[0].upd(a, r[a]);
  tr[1].upd(a, c[a]);
  tr[0].upd(b, r[b]);
  tr[1].upd(b, c[b]);
  ans = 0;
  ll area;
  for (ll i = 1; i <= n; ) {
  	pair < int, int > tp1, tp2;
  	tp1 = tr[0].get(1, i);
  	tp2 = tr[1].get(1, i);
  	assert(tp1.fr >= 0 && tp2.fr >= 0);
  	assert(tp1.sc < h && tp2.sc < w);
  	area = (tp1.sc - tp1.fr + 1) * 1LL * (tp2.sc - tp2.fr + 1);
  	if (i == area) {
  		ans++;
  		i++;
  	} else {
  		i = area;
  	}
  }                     
	return ans; 
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 6
• Subtask 3: 0 / 20
• Subtask 4: 0 / 6
• Subtask 5: 0 / 33
• Subtask 6: 0 / 30