#include "bits/extc++.h"
using namespace std;
template <typename T>
void dbgh(const T& t) {
cerr << t << endl;
}
template <typename T, typename... U>
void dbgh(const T& t, const U&... u) {
cerr << t << " | ";
dbgh(u...);
}
#ifdef DEBUG
#define dbg(...) \
cerr << "L" << __LINE__ << " [" << #__VA_ARGS__ << "]: "; \
dbgh(__VA_ARGS__);
#else
#define dbg(...)
#define cerr \
if (false) \
cerr
#endif
#define endl "\n"
#define long int64_t
#define sz(x) int((x).size())
int n, m;
vector<int> r, c;
void give_initial_chart(int _n, int _m, vector<int> _r, vector<int> _c) {
n = _n;
m = _m;
r = _r;
c = _c;
}
int swap_seats(int a, int b) {
swap(r[a], r[b]);
swap(c[a], c[b]);
int ans = 0, mnr = r[0], mxr = r[0], mnc = c[0], mxc = c[0];
for (int i = 0; i < n * m; i++) {
mnr = min(mnr, r[i]);
mxr = max(mxr, r[i]);
mnc = min(mnc, c[i]);
mxc = max(mxc, c[i]);
ans += i + 1 == (mxr - mnr + 1) * (mxc - mnc + 1);
}
return ans;
}
