//by szh
#include<bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define pii pair<int,int>
#define pll pair<long long,long long>
#define pb push_back
#define debug(x) cerr<<#x<<"="<<x<<endl
#define pq priority_queue
#define inf 0x3f
#define rep(i,a,b) for (int i=a;i<(b);i++)
#define MP make_pair
#define SZ(x) (int(x.size()))
#define ll long long
#define mod 1000000007
#define ALL(x) x.begin(),x.end()
void inc(int &a,int b) {a=(a+b)%mod;}
void dec(int &a,int b) {a=(a-b+mod)%mod;}
int lowbit(int x) {return x&(-x);}
ll p0w(ll base,ll p) {ll ret=1;while(p>0){if (p%2ll==1ll) ret=ret*base%mod;base=base*base%mod;p/=2ll;}return ret;}
namespace {
int read_int() {
int x;
if (scanf("%d", &x) != 1) {
fprintf(stderr, "Error while reading input\n");
exit(1);
}
return x;
}
} // namespace
#include "seats.h"
const int maxn = 1e4+10;
pii pos[maxn];
int n;
void give_initial_chart(int H, int W, std::vector<int> R, std::vector<int> C) {
rep(i,0,H*W) pos[i] = {R[i],C[i]};
n = H*W;
}
int swap_seats(int a, int b) {
swap(pos[a],pos[b]);
int ret = 1;
int minx = pos[0].fi, maxx = pos[0].fi, miny = pos[0].se, maxy = miny;
rep(i,1,n) {
minx = min(minx,pos[i].fi);
maxx = max(maxx,pos[i].fi);
miny = min(miny,pos[i].se);
maxy = max(maxy,pos[i].se);
if ((maxx-minx+1) * (maxy-miny+1) == i+1) ret++;
}
return ret;
}
