#include "seats.h"
#include <bits/stdc++.h>
using namespace std;
constexpr int inf = 1e9 + 7;
struct bounding_rectangle{
int lx = inf, rx = -inf, ly = inf, ry = -inf;
void insert(int x, int y){
lx = min(lx, x);
rx = max(rx, x);
ly = min(ly, y);
ry = max(ry, y);
}
int area(){
return (rx - lx + 1) * (ry - ly + 1);
}
};
int n, m;
vector <vector <int>> a;
vector <pair <int, int>> pos;
int ans;
vector <bounding_rectangle> b;
void give_initial_chart(int _n, int _m, vector <int> _r, vector <int> _c){
n = _n;
m = _m;
a.assign(n, vector <int>(m));
pos.resize(n * m);
for (int val = 0; val < n * m; val++){
int x = _r[val], y = _c[val];
a[x][y] = val;
pos[val] = pair{x, y};
}
ans = 0;
b.resize(n * m + 1);
for (int val = 0; val < n * m; val++){
b[val + 1] = b[val];
b[val + 1].insert(pos[val].first, pos[val].second);
if (b[val + 1].area() == val + 1){
ans++;
}
}
}
int swap_seats(int val1, int val2){
if (val1 > val2){
swap(val1, val2);
}
{
auto [x1, y1] = pos[val1];
auto [x2, y2] = pos[val2];
swap(a[x1][y1], a[x2][y2]);
swap(pos[val1], pos[val2]);
}
for (int val = val1; val < val2; val++){
if (b[val + 1].area() == val + 1){
ans--;
}
b[val + 1] = b[val];
b[val + 1].insert(pos[val].first, pos[val].second);
if (b[val + 1].area() == val + 1){
ans++;
}
}
return ans;
}
