#include "aliens.h"
#include <bits/stdc++.h>
using namespace std;
#define int long long
const int inf=1e18;
long long take_photos(int32_t n, int32_t m, int32_t k, vector<int32_t> r, vector<int32_t> c) {
vector<pair<int, int>> v;
for (int i=0; i<n; ++i){
v.emplace_back(min(r[i], c[i]), max(r[i], c[i]));
}
sort(v.begin(), v.end());
vector<pair<int, int>> v2;
for (int i=0; i<(int)v.size(); ++i){
int j=i;
while (j+1<(int)v.size() && v[j+1].first==v[i].first) ++j;
if (v2.empty() || v2.back().second<v[j].second) v2.push_back(v[j]);
i=j;
}
n=v2.size();
vector<vector<int>> f(n+1, vector<int>(k+1, inf));
f[0][0]=0;
for (int i=1; i<=n; ++i){
for (int j=1; j<=k; ++j){
for (int l=1; l<=i; ++l){
int area=(v2[i-1].second-v2[l-1].first+1)*(v2[i-1].second-v2[l-1].first+1);
if (l!=1 && v2[l-2].second>=v2[l-1].first) area-=(v2[l-2].second-v2[l-1].first+1)*(v2[l-2].second-v2[l-1].first+1);
f[i][j]=min(f[i][j], f[l-1][j-1]+area);
}
}
}
return *min_element(f[n].begin(), f[n].end());
}
