#include "seats.h"
#include<bits/stdc++.h>
using namespace std;
const int N=1e6+5;
int h,w,n;
int r[N],c[N];
int mnr[N],mnc[N],mxr[N],mxc[N];
int ans=0;
void give_initial_chart(int H, int W, vector<int> R, vector<int> C){
h=H,w=W;
n=h*w;
mnr[0]=h;
mnc[0]=w;
mxr[0]=-1;
mxc[0]=-1;
for(int i=1;i<=n;i++){
r[i]=R[i-1];
c[i]=C[i-1];
mnr[i]=min(mnr[i-1],r[i]);
mnc[i]=min(mnc[i-1],c[i]);
mxr[i]=max(mxr[i-1],r[i]);
mxc[i]=max(mxc[i-1],c[i]);
if((mxr[i]-mnr[i]+1)*(mxc[i]-mnc[i]+1)==i)ans++;
}
}
int swap_seats(int a, int b){
if(a>b)swap(a,b);
a++,b++;
swap(r[a],r[b]);
swap(c[a],c[b]);
for(int i=a;i<=b;i++){
if((mxr[i]-mnr[i]+1)*(mxc[i]-mnc[i]+1)==i)ans--;
mnr[i]=min(mnr[i-1],r[i]);
mnc[i]=min(mnc[i-1],c[i]);
mxr[i]=max(mxr[i-1],r[i]);
mxc[i]=max(mxc[i-1],c[i]);
if((mxr[i]-mnr[i]+1)*(mxc[i]-mnc[i]+1)==i)ans++;
}
return ans;
}
