#include "seats.h"
#include <bits/stdc++.h>
using namespace std;
int ans = 1, H, W;
vector<int> R, C, lor, hir, loc, hic;
void give_initial_chart(int HH, int WW, vector<int> RR, vector<int> CC) {
H = HH, W = WW, R = RR, C = CC;
lor.resize(H * W), hir.resize(H * W);
loc.resize(H * W), hic.resize(H * W);
lor[0] = hir[0] = R[0];
loc[0] = hic[0] = C[0];
for (int i = 1; i < H * W; i++) {
lor[i] = min(lor[i - 1], R[i]);
hir[i] = max(hir[i - 1], R[i]);
loc[i] = min(loc[i - 1], C[i]);
hic[i] = max(hic[i - 1], C[i]);
if ((hir[i] - lor[i] + 1) * (hic[i] - loc[i] + 1) == i + 1) {
ans++;
}
}
}
int swap_seats(int a, int b) {
if (b < a) {
swap(a, b);
}
swap(R[a], R[b]);
swap(C[a], C[b]);
for (int i = a; i <= min(H * W - 1, b + 1); i++) {
if ((hir[i] - lor[i] + 1) * (hic[i] - loc[i] + 1) == i + 1) {
ans--;
}
if (i == 0) {
lor[i] = hir[i] = R[i];
loc[i] = hic[i] = C[i];
} else {
lor[i] = min(lor[i - 1], R[i]);
hir[i] = max(hir[i - 1], R[i]);
loc[i] = min(loc[i - 1], C[i]);
hic[i] = max(hic[i - 1], C[i]);
}
if ((hir[i] - lor[i] + 1) * (hic[i] - loc[i] + 1) == i + 1) {
ans++;
}
}
return ans;
}
