#include "seats.h"
#include <bits/stdc++.h>
using namespace std;
using vi = vector<int>;
struct AINT {
int n;
vi mi, ma;
AINT(int N) : n(N), mi(4 * N), ma(4 * N) {}
};
vi r, c;
vi mir, mic;
vi mar, mac;
int reg = 0;
void give_initial_chart(int H, int W, vi R, vi C) {
r = mir = mar = R;
c = mac = mic = C;
reg = 1;
for(int i = 1; i < H * W; ++i) {
mar[i] = max(mar[i], mar[i - 1]);
mac[i] = max(mac[i], mac[i - 1]);
mir[i] = min(mir[i], mir[i - 1]);
mic[i] = min(mic[i], mic[i - 1]);
reg += (i + 1) == ((mac[i] - mic[i] + 1) * (mar[i] - mir[i] + 1));
}
}
int swap_seats(int a, int b) {
if(a > b) swap(a, b);
swap(r[a], r[b]);
swap(c[a], c[b]);
for(int i = a; i <= b; ++i) {
reg -= (i + 1) == ((mac[i] - mic[i] + 1) * (mar[i] - mir[i] + 1));
mir[i] = mar[i] = r[i];
mic[i] = mac[i] = c[i];
}
for(int i = a; i <= b; ++i) {
if(i) {
mar[i] = max(mar[i], mar[i - 1]);
mac[i] = max(mac[i], mac[i - 1]);
mir[i] = min(mir[i], mir[i - 1]);
mic[i] = min(mic[i], mic[i - 1]);
}
reg += (i + 1) == ((mac[i] - mic[i] + 1) * (mar[i] - mir[i] + 1));
}
return reg;
}
