#include "seats.h"
#include<bits/stdc++.h>
#pragma GCC optimize("Ofast")
using namespace std;
const int N = 1e6 + 5, INF = 1e9, G = 5;
int n, m, len;
vector<int> x, y;
vector<int> num[N];
int dx[4] = { 0, 0, 1, 1 }, dy[4] = { 1, 0, 0, 1};
int mn[N * 4], ct[N * 4], up[N * 4];
void push(int v, int L, int R) {
if (up[v]) {
if (L != R) {
up[v * 2] += up[v];
up[v * 2 + 1] += up[v];
}
mn[v] += up[v];
up[v] = 0;
}
}
void upd(int l, int r, int x, int v, int L, int R) {
push(v, L, R);
if (l > r)
return;
if (l == L && r == R) {
up[v] += x;
push(v, L, R);
}
else {
int m = (L + R) >> 1;
upd(l, min(m, r), x, v * 2, L, m);
upd(max(m + 1, l), r, x, v * 2 + 1, m + 1, R);
if (mn[v * 2] == mn[v * 2 + 1]) {
mn[v] = mn[v * 2];
ct[v] = ct[v * 2] + ct[v * 2 + 1];
}
else if (mn[v * 2] < mn[v * 2 + 1]) {
mn[v] = mn[v * 2];
ct[v] = ct[v * 2];
}
else {
mn[v] = mn[v * 2 + 1];
ct[v] = ct[v * 2 + 1];
}
}
}
int anime[4];
void upd2times2(int a, int b, int d) {
for (int j = 0; j < 4; j++) {
anime[j] = num[a + dx[j]][b + dy[j]];
}
sort(anime, anime + 4);
upd(anime[0], anime[1] - 1, d, 1, 0, len - 1);
upd(anime[2], anime[3] - 1, d * G, 1, 0, len - 1);
}
void change(int a, int b, int d) {
for (int i = 0; i < 4; i++) {
upd2times2(a - dx[i], b - dy[i], d);
}
}
// void que(int v, int L, int R) {
// push(v, L, R);
// if (L == R) {
// cout << t[v].mn << " ";
// }
// else {
// int m = (L + R) >> 1;
// que(v * 2, L, m);
// que(v * 2 + 1, m + 1, R);
// }
// }
void give_initial_chart(int H, int W, std::vector<int> R, std::vector<int> C) {
n = H;
m = W;
x = R;
y = C;
len = n * m;
for (int i = 0; i < n + 2; i++)
num[i].resize(m + 2, len);
fill(ct, ct + len * 4, 1);
for (int i = 0; i < len; i++) {
x[i]++;
y[i]++;
num[x[i]][y[i]] = i;
}
for (int i = 0; i <= n; i++) {
for (int j = 0; j <= m; j++) {
upd2times2(i, j, 1);
}
}
}
int swap_seats(int a, int b) {
change(x[a], y[a], -1);
num[x[a]][y[a]] = b;
change(x[a], y[a], 1);
change(x[b], y[b], -1);
num[x[b]][y[b]] = a;
change(x[b], y[b], 1);
swap(x[a], x[b]);
swap(y[a], y[b]);
push(1, 0, len - 1);
return mn[1] == 4 ? ct[1] : 0;
}
