#include <bits/stdc++.h>
#include "seats.h"
#define pb push_back
using namespace std;
const int maxn = 1e6 + 10;
int n, h, w;
long long r[maxn], c[maxn];
int is[maxn];
long long mnr[maxn], mxr[maxn];
long long mnc[maxn], mxc[maxn];
int ans = 0;
void give_initial_chart(int H, int W, std::vector<int> R, std::vector<int> C)
{
h = H;
w = W;
n = h * w;
for (int i = 0; i < n; ++ i)
{
r[i] = R[i];
c[i] = C[i];
}
long long minr = r[0];
long long maxr = r[0];
long long minc = c[0];
long long maxc = c[0];
for (int i = 0; i < n; ++ i)
{
minr = min(minr, r[i]);
maxr = max(maxr, r[i]);
minc = min(minc, c[i]);
maxc = max(maxc, c[i]);
mnr[i] = minr;
mxr[i] = maxr;
mnc[i] = minc;
mxc[i] = maxc;
int total = (maxc - minc + 1) * (maxr - minr + 1);
if(total == i+1)
{
is[i] = 1;
ans ++;
}
}
// cout << "ans ids " << ans << endl;
}
int swap_seats(int a, int b)
{
swap(r[a], r[b]);
swap(c[a], c[b]);
for (int i = min(a, b); i <= max(a, b); ++ i)
{
ans -= is[i];
if(i != 0)
{
mnr[i] = mnr[i-1];
mxr[i] = mxr[i-1];
mnc[i] = mnc[i-1];
mxc[i] = mxc[i-1];
mnr[i] = min(mnr[i], r[i]);
mxr[i] = max(mxr[i], r[i]);
mnc[i] = min(mnc[i], c[i]);
mxc[i] = max(mxc[i], c[i]);
}
else
{
mnr[i] = r[i];
mxr[i] = r[i];
mnc[i] = c[i];
mxc[i] = c[i];
}
long long total = (mxc[i] - mnc[i] + 1) * (mxr[i] - mnr[i] + 1);
if(total == i+1)
{
is[i] = 1;
ans ++;
}
else is[i] = 0;
}
return ans;
}
