This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "aliens.h"
#include<bits/stdc++.h>
#define ll int
#define pb push_back
#define mp make_pair
#define ld long double
#define F first
#define S second
#define pii pair<ll,ll>
using namespace :: std;
const ll maxn=4100;
const ll maxk=4010;
const ll inf=1e9+900;
const ll logg=20;
ll tav2(ll x){
return x*x;
}
ll mx[maxn];
ll dp[maxn][maxk];
ll ff[maxn][logg];
ll tt[maxn];
ll findMn(ll l,ll r){
ll tol=r-l+1;
return min(ff[l][tt[tol]],ff[r-(1<<tt[tol])+1][tt[tol]]);
}
ll cost(ll i,ll x){
ll t=findMn(x+1,i);
if(x==-1)return tav2(i-t+1);
if(mx[x]>=t){
return inf;
}
if(t>x){
return tav2(i-t+1);
}
return tav2(i-t+1)-tav2(x-t+1);
}
long long take_photos(int n, int m, int k, vector<int> r, vector<int> c) {
swap(n,m);
fill(mx,mx+maxn,inf);
for(ll i=0;i<m;i++){
if(c[i]>r[i]){
swap(c[i],r[i]);
}
mx[r[i]]=min(mx[r[i]],(ll)c[i]);
}
for(ll i=0;i<n;i++){
ff[i][0]=mx[i];
}
tt[1]=0;
for(ll i=2;i<maxn;i++){
tt[i]=tt[i/2]+1;
}
for(ll i=1;i<logg;i++){
for(ll j=0;j<n;j++){
ll res=j+(1<<(i-1));
if(res>=n){
ff[j][i]=ff[j][i-1];
}else{
ff[j][i]=min(ff[j][i-1],ff[res][i-1]);
}
}
}
for(ll i=1;i<=n;i++){
for(ll j=0;j<=k;j++){
if(mx[i-1]==inf){
dp[i][j]=dp[i-1][j];
}else{
if(j==0){
dp[i][j]=inf;
}else{
dp[i][j]=inf;
for(ll x=i-1;x>=0;x--){
dp[i][j]=min(dp[i][j],dp[x][j-1]+cost(i-1,x-1));
}
}
}
}
}
return dp[n][k];
}
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