#include <bits/stdc++.h>
#include "seats.h"
#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
using namespace std;
#define X first
#define Y second
#define pb push_back
typedef pair<int, int> ii;
typedef long long ll;
const int maxn = 1e6+5;
int r[maxn], c[maxn];
int mnr[maxn];
int mxr[maxn];
int mnc[maxn];
int mxc[maxn];
int n, m;
int ans = 0;
void give_initial_chart(int H, int W, vector<int> R, vector<int> C)
{
n = H; m = W;
for(int i = 0; i< n*m; i++)
{
r[i] = R[i];
c[i] = C[i];
}
for(int i = 0; i< n*m; i++)
{
mnr[i] = min(i?mnr[i-1]:n*m, r[i]);
mxr[i] = max(i?mxr[i-1]:0, r[i]);
mnc[i] = min(i?mnc[i-1]:n*m, c[i]);
mxc[i] = max(i?mxc[i-1]:0, c[i]);
if((mxr[i]-mnr[i]+1)*(mxc[i]-mnc[i]+1) == i+1) ans++;
}
}
int swap_seats(int a, int b)
{
if(a> b) swap(a, b);
swap(r[a], r[b]);
swap(c[a], c[b]);
for(int i = a; i< b; i++)
{
int old = 0;
if((mxr[i]-mnr[i]+1)*(mxc[i]-mnc[i]+1) == i+1) old = 1;
mnr[i] = min(i?mnr[i-1]:n*m, r[i]);
mxr[i] = max(i?mxr[i-1]:0, r[i]);
mnc[i] = min(i?mnc[i-1]:n*m, c[i]);
mxc[i] = max(i?mxc[i-1]:0, c[i]);
int nw = 0;
if((mxr[i]-mnr[i]+1)*(mxc[i]-mnc[i]+1) == i+1) nw = 1;
ans += nw-old;
}
return ans;
}
