Submission #94555

#	Time	Username	Problem	Language	Result	Execution time	Memory
94555		someone_aa	Aliens (IOI16_aliens)	C++17	25 / 100	2074 ms	129108 KiB

aliens

#include <bits/stdc++.h>
#include "aliens.h"
#define ll long long
#define pb push_back
#define mp make_pair
#define P pair<ll,ll>
using namespace std;
const int maxn = 4100;
ll dp[maxn][maxn];
int n, m, k;

vector<P>temp_segments, segments;



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

    for(int i=0;i<N;i++) {
        temp_segments.pb(mp(min(r[i], c[i]), max(r[i], c[i])));
    }

    sort(temp_segments.begin(), temp_segments.end());
    int li = -1, ri = -1;
    for(auto i:temp_segments) {
        if(i.first >= li && i.second <= ri) continue;
        else {
            segments.pb(i);
            li = i.first;
            ri = i.second;
        }
    }

    for(int i=0;i<=n;i++) {
        for(int j=0;j<=n;j++) {
            dp[i][j] = (1LL << 45);
        }
        dp[i][0] = 0LL;
    }

    int n = segments.size();
    for(int p=1;p<=min(n, k);p++) {
        for(int i=1;i<=n;i++) {
            dp[p][i] = LLONG_MAX;
            for(int t=0;t<i;t++) {
                ll intersection = 0LL;
                ll cost = 0LL;
                cost = segments[i-1].second - segments[t].first + 1;
                cost *= cost;
                if(t > 0) {
                    ll temp = segments[t-1].second - segments[t].first + 1;
                    intersection = max(0LL, temp) * max(0LL, temp);
                }
                dp[p][i] = min(dp[p][i], dp[p-1][t] + cost - intersection);
            }
        }
    }
    return dp[min(n, k)][n];
}

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