#include "seats.h"
#include <bits/stdc++.h>
using namespace std;
const int INF = 1e9;
int n, h, w, cnt_good;
vector<int> r, r_mn, r_mx, c, c_mn, c_mx, is_good;
int area(int i) {
return (r_mx[i] - r_mn[i] + 1) * (c_mx[i] - c_mn[i] + 1);
}
void give_initial_chart(int H, int W, vector<int> R, vector<int> C) {
h = H, w = W, n = H * W;
r = R, r_mn = r, r_mx = r, c = C, c_mn = c, c_mx = c;
is_good.resize(n);
cnt_good = is_good[0] = 1;
for (int i = 1; i < n; i++) {
r_mn[i] = min(r_mn[i - 1], r[i]);
r_mx[i] = max(r_mx[i - 1], r[i]);
c_mn[i] = min(c_mn[i - 1], c[i]);
c_mx[i] = max(c_mx[i - 1], c[i]);
is_good[i] = (area(i) == i + 1);
cnt_good += is_good[i];
}
}
int swap_seats(int a, int b) {
if (a > b) swap(a, b);
if (b - a > 10000) cout << "parumna";
for (int i = a; i <= b; i++) {
cnt_good -= is_good[i];
}
swap(r[a], r[b]);
swap(c[a], c[b]);
for (int i = a; i <= b; i++) {
r_mn[i] = min(i ? r_mn[i - 1] : INF, r[i]);
r_mx[i] = max(i ? r_mx[i - 1] : -1, r[i]);
c_mn[i] = min(i ? c_mn[i - 1] : INF, c[i]);
c_mx[i] = max(i ? c_mx[i - 1] : -1, c[i]);
is_good[i] = (area(i) == i + 1);
cnt_good += is_good[i];
}
return cnt_good;
}
