Submission #158071

#	Time	Username	Problem	Language	Result	Execution time	Memory
158071		johutha	Aliens (IOI16_aliens)	C++14	25 / 100	253 ms	2408 KiB

aliens

#include "aliens.h"
#include <vector>
#include <iostream>
#include <deque>
#include <algorithm>

#define int long long

using namespace std;

int take_photos(signed n, signed m, signed k, vector<signed> r, vector<signed> c)
{
    vector<pair<int,int>> intervals;
    for (int i = 0; i < n; i++)
    {
        intervals.push_back({min(r[i], c[i]), -max(r[i], c[i])});
    }
    sort(intervals.begin(), intervals.end());
    vector<int> nl;
    vector<int> nr;
    int mmx = -1;
    for (int i = 0; i < n; i++)
    {
        if (-intervals[i].second > mmx)
        {
            nl.push_back(intervals[i].first);
            nr.push_back(-intervals[i].second);
            mmx = -intervals[i].second;
        }
    }
    int nn = nl.size();
    vector<vector<int>> dp(nn + 1, vector<int>(k + 1, 1e9));
    dp[0][0] = 0;
    for (int i = 1; i <= nn; i++)
    {
        for (int j = 1; j <= k; j++)
        {
            dp[i][j] = min(dp[i][j], dp[i][j - 1]);
            for (int q = 0; q < i; q++)
            {
                int ol = 0;
                if (q > 0 && nl[q] <= nr[q - 1])
                {
                    ol = nr[q - 1] - nl[q] + 1;
                    ol *= ol;
                }
                dp[i][j] = min(dp[i][j], dp[q][j - 1] + (nr[i - 1] - nl[q] + 1)*(nr[i - 1] - nl[q] + 1) - ol);
            }
        }
    }
    return dp[nn][k];
}

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