Submission #1315059

#	Time	Username	Problem	Language	Result	Execution time	Memory
1315059		boclobanchat	Aliens (IOI16_aliens)	C++20	25 / 100	2095 ms	27764 KiB

aliens

#include"aliens.h"
#include<bits/stdc++.h>
using namespace std;
const int MAXN=5005;
const long long INF=1e18;
long long dp[MAXN][MAXN];
long long take_photos(int n,int m,int k,vector<int> r,vector<int> c)
{
	vector< pair<int,int> > vi;
	for(int i=0;i<n;i++) vi.push_back({min(r[i],c[i]),max(r[i],c[i])});
	sort(vi.begin(),vi.end());
	vector< pair<int,int> > vv;
	vv.push_back(vi[0]);
	for(int i=1;i<n;i++)
	{
		if(vv.back().first==vi[i].first) vv.pop_back(),vv.push_back(vi[i]);
		else if(vv.back().second<vi[i].second) vv.push_back(vi[i]);
	}
	n=vv.size(),k=min(k,n);
	for(int i=0;i<=k;i++) for(int j=0;j<=n;j++) dp[i][j]=INF;
	dp[0][0]=0;
	for(int i=1;i<=k;i++)
	{
		for(int j=i;j<=n;j++) for(int k=i-1;k<j;k++)
			if(k==0)dp[i][j]=min(dp[i][j],dp[i-1][k]+1LL*(vv[j-1].second-vv[k].first+1)*(vv[j-1].second-vv[k].first+1));
			else dp[i][j]=min(dp[i][j],dp[i-1][k]+1LL*(vv[j-1].second-vv[k].first+1)*(vv[j-1].second-vv[k].first+1)-1LL*max(0,vv[k-1].second-vv[k].first+1)*max(0,vv[k-1].second-vv[k].first+1));
	}
	return dp[k][n];
}

Compilation message (stderr)

aliens.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~
aliens_c.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~

• Subtask 1: 4 / 4
• Subtask 2: 12 / 12
• Subtask 3: 9 / 9
• Subtask 4: 0 / 16
• Subtask 5: 0 / 19
• Subtask 6: 0 / 40