이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#undef local
#include <bits/stdc++.h>
#define all(v) v.begin(),v.end()
#define allr(v) v.rbegin(),v.rend()
#define fori(i,n) for(int i=0;i<n;i++)
#define ford(i,n) for(int i = n-1;i >= 0;i--)
#define pb push_back
#define ll long long int
//#define mod 998244353
#define pi pair<int,int>
#define pll pair<ll,ll>
#define mp make_pair
#define fi first
#define se second
#define printVector(v) fori(;,v.size()) {cout << v[i] << " ";} cout << "\n";
#pragma GCC optimize("O3")
std::mt19937 rng((unsigned int) std::chrono::steady_clock::now().time_since_epoch().count());
using namespace std;
ll getAns(vector<pll> a,ll k){
int n = a.size();
sort(all(a),[&](pll x,pll y){
return mp(x.fi,-x.se) < mp(y.fi,-y.se);
});
int ptr = a[0].se;
vector<pll> b = {a[0]};
for(int i= 1;i < n;i++){
if(a[i].se <= ptr){
continue;
}
b.push_back(a[i]);
ptr = a[i].se;
}
a = b;
n = a.size();
vector<vector<ll> > dp(n+1,vector<ll> (k+1,1e18));
fori(i,k+1) dp[0][i] = 0;
for(int i = 1;i <= n;i++){
for(int j = 1;j <= k;j++){
dp[i][j] = dp[i][j-1];
vector<ll> vals;
for(int t = i;t >= 1;t--){
ll d = a[i-1].se - a[t-1].fi + 1;
d *= d;
if(t >= 2 && a[t-1].fi <= a[t-2].se){
ll s = a[t-2].se - a[t-1].fi + 1;
s *= s;
d -= s;
}
dp[i][j] = min(dp[i][j],dp[t-1][j-1] + d);
vals.pb(dp[t-1][j-1] + d);
}
int sz = vals.size();
for(int i = 0;i < sz-2;i++){
assert(vals[i+1] - vals[i] <= vals[i+2] - vals[i+1]);
}
}
}
return dp[n][k];
}
long long take_photos(int n, int m, int k, vector<int> r, vector<int> c){
vector<pll> a;
for(int i = 0;i < n;i++){
int x = r[i];
int y = c[i];
a.pb(mp(min(x,y),max(x,y)));
}
sort(all(a));
a.erase(unique(all(a)),a.end());
ll ans = getAns(a,k);
return ans;
}
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