#include "seats.h"
//#include "grader.cpp"
#include <bits/stdc++.h>
using namespace std;
#define lol long long
#define pii pair<int,int>
#define OK puts("OK");
#define NO puts("NO");
#define YES puts("YES");
#define fr first
#define sc second
#define ret return
#define scanl(a) scanf("%lld",&a);
#define scanll(a,b) scanf("%lld %lld",&a, &b);
#define scanlll(a,b,c) scanf("%lld %lld %lld",&a,&b,&c);
#define scan1(a) scanf("%d",&a);
#define scan2(a,b) scanf("%d %d",&a, &b);
#define scan3(a,b,c) scanf("%d %d %d",&a,&b,&c);
#define all(s) s.begin(),s.end()
#define allr(s) s.rbegin()Ñ,s.rend()
#define pb push_back
#define sz(v) (int)v.size()
#define endi puts("");
#define eps 1e-12
const int N = 3e5+12,INF=1e9+7;
pii p[N];
int n;
void give_initial_chart(int H, int W, vector<int> R, vector<int> C) {
int i;
n = H*W;
for (i=0;i<n;++i)
p[i] = {R[i],C[i]};
}
int swap_seats(int a, int b) {
swap(p[a],p[b]);
int x1=INF,y1=INF,x2=0,y2=0,i,ans=0;
for (i=0;i<n;++i){
x1 = min(x1,p[i].fr);
y1 = min(y1,p[i].sc);
x2 = max(x2,p[i].fr);
y2 = max(y2,p[i].sc);
int x = x2-x1+1;
int y = y2-y1+1;
int z = x*y-1;
if (z == i){
ans ++;
}
}
return ans;
}
