#include "seats.h"
#include<bits/stdc++.h>
using namespace std;
vector<int> R, C;
int h, w;
const int N=1e5+5;
vector<int> x1(N), x2(N);
vector<int> Y1(N), y2(N);
int ans=1;
void give_initial_chart(int H, int W, std::vector<int> R2, std::vector<int> C2) {
R=R2;
C=C2;
h=H;
w=W;
x1[0]=R[0];
x2[0]=R[0];
Y1[0]=C[0];
y2[0]=C[0];
for(int i=1; i<h*w; i++){
x1[i]=min(x1[i-1], R[i]);
x2[i]=max(x2[i-1], R[i]);
Y1[i]=min(Y1[i-1], C[i]);
y2[i]=max(y2[i-1], C[i]);
if(i==(x2[i]-x1[i]+1)*(y2[i]-Y1[i]+1)-1)ans++;
}
}
int swap_seats(int a, int b) {
swap(R[a], R[b]);
swap(C[a], C[b]);
x1[0]=R[0], x2[0]=R[0], Y1[0]=C[0], y2[0]=C[0];
for(int i=max(1, min(a, b)); i<=max(a, b); i++){
if(i==(x2[i]-x1[i]+1)*(y2[i]-Y1[i]+1)-1)ans--;
}
for(int i=max(1, min(a, b)); i<=max(a, b); i++){
x1[i]=min(x1[i-1], R[i]);
x2[i]=max(x2[i-1], R[i]);
Y1[i]=min(Y1[i-1], C[i]);
y2[i]=max(y2[i-1], C[i]);
if(i==(x2[i]-x1[i]+1)*(y2[i]-Y1[i]+1)-1)ans++;
}
return ans;
}
