#include <bits/stdc++.h>
using namespace std;
#include "seats.h"
#define tol(bi) (1LL<<((int)(bi)))
struct BIT{
BIT(){}
vector<vector<int>> arr;
void init(int n, int m){
arr.resize(n,vector<int>(m,0));
}
void update(int x, int y, int val){
arr[x][y]=val;
}
int minq(int xl, int xr, int yl, int yr){
int rval = 23232323;
//cout<<xl<<" "<<xr<<" "<<yl<<" "<<yr<<endl;
//cout<<arr.size()<<" "<<arr[0].size()<<endl;
for (int i = xl; i <= xr; i++){
for (int j = yl; j <= yr; j++){
rval=min(rval,arr[i][j]);
}
}
return rval;
}
int maxq(int xl, int xr, int yl, int yr){
int rval = 0;
//cout<<xl<<" "<<xr<<" "<<yl<<" "<<yr<<endl;
//cout<<arr.size()<<" "<<arr[0].size()<<endl;
for (int i = xl; i <= xr; i++){
for (int j = yl; j <= yr; j++){
rval=max(rval,arr[i][j]);
}
}
return rval;
}
};
vector<int> R,C;
BIT fenwik;
int H,W;
void give_initial_chart(int _H, int _W, std::vector<int> _R, std::vector<int> _C) {
R=_R,C=_C;
H=_H,W=_W;
fenwik.init(H,W);
for (int i = 0; i < R.size(); ++i)
{
fenwik.update(R[i],C[i],i);
}
}
int swap_seats(int a, int b) {
swap(R[a],R[b]);
swap(C[a],C[b]);
fenwik.update(R[a],C[a],a);
fenwik.update(R[b],C[b],b);
int n = R.size();
int crmax = 0;
int ans = 1;
int xl=R[0],xr=R[0];
int yl=C[0],yr=C[0];
while (crmax<R.size()-1){
int minel = 23232323;
//cout<<crmax<<endl;
//cout<<"ISTE GELDIK"<<endl;
if (xl>0) minel=min(minel,fenwik.minq(0,xl-1,0,W-1));
//cout<<"GIDIYORUZ"<<endl;
if (xr+1<H) minel=min(minel,fenwik.minq(xr+1,H-1,0,W-1));
//cout<<"BILINMEZ BIR"<<endl;
if (yl>0) minel=min(minel,fenwik.minq(xl,xr,0,yl-1));
//cout<<"DIYARA"<<endl;
if (yr+1<W) minel=min(minel,fenwik.minq(xl,xr,yr+1,W-1));
//cout<<"ESKIDEN KARPUR IDIK"<<endl;
//cout<<xl<<" "<<xr<<" "<<yl<<" "<<yr<<endl;
//cout<<crmax<<endl;
//cout<<minel<<endl;
xr=max(xr,R[minel]);
xl=min(xl,R[minel]);
yr=max(yr,C[minel]);
yl=min(yl,C[minel]);
crmax=fenwik.maxq(xl,xr,yl,yr);
crmax=max(crmax,minel);
if ((xr-xl+1)*(yr-yl+1)==crmax+1) ans++;
}
return ans;
}
