#include "seats.h"
#include<bits/stdc++.h>
using namespace std;
const int lim=1e4+100;
int n,h,w;
vector<int>v[lim];
vector<int>r,c;
int ok[lim];
int ans=0,mxc[lim],mxr[lim],mnr[lim],mnc[lim];
void give_initial_chart(int H,int W,vector<int>R,vector<int>C){
n=H*W;
h=H;
w=W;
for(int i=0;i<H;i++){
v[i].resize(W);
}
r=R,c=C;
for(int i=0;i<n;i++){
v[r[i]][c[i]]=i;
}
for(int i=0;i<n;i++){
mxc[i]=mnc[i]=c[i];
mxr[i]=mnr[i]=r[i];
if(i){
mxc[i]=max(mxc[i],mxc[i-1]);
mxr[i]=max(mxr[i],mxr[i-1]);
mnc[i]=min(mnc[i],mnc[i-1]);
mnr[i]=min(mnr[i],mnr[i-1]);
}
if(i+1==(mxc[i]-mnc[i]+1)*(mxr[i]-mnr[i]+1)){
ok[i]=1;
ans++;
}
}
}
int swap_seats(int x,int y){
if(y<x)swap(x,y);
swap(r[x],r[y]);
swap(c[x],c[y]);
for(int i=x;i<=y;i++){
mxc[i]=mnc[i]=c[i];
mxr[i]=mnr[i]=r[i];
if(i){
mxc[i]=max(mxc[i],mxc[i-1]);
mxr[i]=max(mxr[i],mxr[i-1]);
mnc[i]=min(mnc[i],mnc[i-1]);
mnr[i]=min(mnr[i],mnr[i-1]);
}
if(i+1==(mxc[i]-mnc[i]+1)*(mxr[i]-mnr[i]+1)){
ans+=1-ok[i];
ok[i]=1;
}else{
ans-=ok[i];
ok[i]=0;
}
}
return ans;
}
// std::vector<int> r;
// void give_initial_chart(int H, int W, std::vector<int> R, std::vector<int> C) {
// r = R;
// }
// int swap_seats(int a, int b) {
// return r[a];
// }
