#include "seats.h"
#include <bits/stdc++.h>
#define ll long long
#define ull unsigned ll
#define f first
#define s second
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pb push_back
#define epb emplace_back
using namespace std;
std::vector<int> r;
std :: vector <int> c;
const int NMAX = 1e6 + 1;
int cnt = 0;
int mxx[NMAX], mnx[NMAX], mny[NMAX], mxy[NMAX];
void give_initial_chart(int H, int W, std::vector<int> R, std::vector<int> C) {
r = R;
c = C;
int n = H, m = W;
for(int i = 0; i < n * m; i++){
if(i == 0){
mxx[i] = r[i];
mnx[i] = r[i];
mny[i] = c[i];
mxy[i] = c[i];
}
else{
mxx[i] = max(mxx[i - 1], r[i]);
mnx[i] = min(mnx[i - 1], r[i]);
mxy[i] = max(mxy[i - 1], c[i]);
mny[i] = min(mny[i - 1], c[i]);
}
int v = mxx[i] - mnx[i] + 1;
int u = mxy[i] - mny[i] + 1;
if(v * u == i + 1) cnt++;
}
}
int swap_seats(int a, int b) {
for(int i = a; i <= b; i++){
int v = mxx[i] - mnx[i] + 1;
int u = mxy[i] - mny[i] + 1;
if(v * u == i + 1) cnt--;
}
swap(r[a], r[b]);
swap(c[a], c[b]);
for(int i = a; i <= b; i++){
if(i == 0){
mxx[i] = r[i];
mnx[i] = r[i];
mny[i] = c[i];
mxy[i] = c[i];
}
else{
mxx[i] = max(mxx[i - 1], r[i]);
mnx[i] = min(mnx[i - 1], r[i]);
mxy[i] = max(mxy[i - 1], c[i]);
mny[i] = min(mny[i - 1], c[i]);
}
int v = mxx[i] - mnx[i] + 1;
int u = mxy[i] - mny[i] + 1;
if(v * u == i + 1) cnt++;
}
return cnt;
}
