Submission #1160470

#	Time	Username	Problem	Language	Result	Execution time	Memory
1160470		borisAngelov	Aliens (IOI16_aliens)	C++17	12 / 100	31 ms	4424 KiB

aliens

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

using namespace std;

const int maxn = 4005;
const long long inf = (1LL << 62);

int n, m, k;
pair<int, int> points[maxn];
vector<pair<int, int>> v;
long long dp[maxn][maxn];

long long sq(long long x)
{
    return x * x;
}

long long take_photos(int N, int M, int K, std::vector<int> r, std::vector<int> c)
{
    m = M;
    k = K;

    for (int i = 1; i <= N; ++i)
    {
        int x = r[i - 1] + 1;
        int y = c[i - 1] + 1;

        if (x > y)
        {
            swap(x, y);
        }

        v.push_back({x, y});
        //cout << "add " << x << " " << y << endl;
    }

    sort(v.begin(), v.end());
    n = 0;

    for (int i = 0; i < N; ++i)
    {
        if (i == 0 || v[i] != v[i - 1])
        {
            points[++n] = v[i];
            //cout << "now " << points[i].first << " " << points[i].second << endl;
        }
    }

    for (int i = 0; i <= n; ++i)
    {
        for (int j = 0; j <= k; ++j)
        {
            dp[i][j] = inf;
        }
    }

    dp[0][0] = 0;

    for (int i = 1; i <= n; ++i)
    {
        for (int j = 1; j <= min(i, k); ++j)
        {
            for (int prv = j; prv <= i; ++prv)
            {
                long long cost = sq(points[i].second - points[prv].first + 1);
                if (prv > 1 && points[prv - 1].second >= points[prv].first) cost -= sq(points[prv - 1].second - points[prv].first + 1);
                dp[i][j] = min(dp[i][j], dp[prv - 1][j - 1] + cost);
            }

            //cout << i << " " << j << " :: " << dp[i][j] << endl;
        }
    }

    long long ans = inf;

    for (int i = 1; i <= k; ++i)
    {
        ans = min(ans, dp[n][i]);
    }

    return ans;
}

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