Submission #330555

#	Time	Username	Problem	Language	Result	Execution time	Memory
330555		IgorI	Aliens (IOI16_aliens)	C++17	12 / 100	248 ms	2412 KiB

aliens

#include <bits/stdc++.h>
#include "aliens.h"

using namespace std;

long long take_photos(int n, int m, int k, vector<int> l, vector<int> r)
{
    vector<int> cv(m);
    for (int i = 0; i < m; i++)
    {
        cv[i] = i + 1;
    }
    for (int i = 0; i < n; i++)
    {
        int x = min(l[i], r[i]);
        int y = max(l[i], r[i]);
        cv[y] = min(cv[y], x);
    }
    l.clear();
    r.clear();
    for (int i = 0; i < m; i++)
    {
        if (cv[i] <= i)
            l.push_back(cv[i]), r.push_back(i);
    }
    n = l.size();
    const long long INFLL = 1e18;
    vector<vector<long long> > dp(n + 1, vector<long long>(k + 1, INFLL));
    dp[0][0] = 0;
    for (int i = 1; i <= n; i++)
    {
        for (int g = 0; g < k; g++)
        {
            for (int p = 0; p < i; p++)
            {
                int L = l[p], R = r[i - 1];
                int covto = -1;
                if (p) covto = r[p - 1];
                if (covto < L)
                    dp[i][g + 1] = min(dp[i][g + 1], dp[p][g] + 1ll * (R - L + 1) * (R - L + 1));
                else
                    dp[i][g + 1] = min(dp[i][g + 1], dp[p][g] + 1ll * (R - L + 1) * (R - L + 1) - 1ll * (covto - L + 1) * (covto - L + 1));
                //cout << p << " " << i << " " << g + 1 << " " << dp[i][g + 1] << endl;
            }
            //cout << i << " " << g + 1 << " " << dp[i][g + 1] << endl;
        }
    }
    return *min_element(dp[n].begin(), dp[n].end());
}

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