#include "aliens.h"
#include <bits/stdc++.h>
using namespace std;
#define REP(a,b,c) for(int a=int(b); a<int(c); a++)
#define REV(a,b,c) for(int a=int(c-1); a>=int(b); a--)
#define RE(a,b) REP(a,0,b)
#define FOR(a,b) for(auto& a:b)
#define pb push_back
#define fi first
#define se second
#define all(a) a.begin(), a.end()
typedef long long ll;
typedef pair<int,int> ii;
typedef vector<int> vi;
typedef vector<ii> vii;
const int INF=1e9;
const int MX=1e5;
vi r, c, le, ri;
int n, m, k;
int SA[MX];
ll take_photos(int _n, int _m, int _k, vi _r, vi _c) {
n=_n; m=_m; k=_k; r=_r; c=_c;
RE(i,n) if(c[i] < r[i]) swap(c[i], r[i]);
RE(i,n) SA[i] = i;
sort(SA,SA+n,[](int i, int j) {
if(r[i] == r[j]) return c[i] > c[j];
return r[i] < r[j];
});
int mxr = -1;
RE(i,n) {
if(c[SA[i]] <= mxr) continue;
le.pb(r[SA[i]]);
ri.pb(c[SA[i]]);
mxr = c[SA[i]];
}
n = le.size();
ll ans = 0;
RE(i,n) {
ll w = ri[i]-le[i]+1;
ans += w*w;
if(i != n-1) {
ll sw = ri[i]-le[i+1];
if(sw > 0)
ans -= sw*sw;
}
}
return ans;
}
