Submission #1222263

#	Time	Username	Problem	Language	Result	Execution time	Memory
1222263		just	Aliens (IOI16_aliens)	C++20	0 / 100	1 ms	584 KiB

aliens

#include "aliens.h"

#include "bits/stdc++.h"
using namespace std;

using ll = long long;
#define vec vector

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

vec<int> a;

int memo[505][505] = {0};
bool done[505][505] = {false};
int calc(int i, int k) {
    if (i == -1) return 0;
    if (k == 0) return INT_MAX;
    if (k == 1) return sq(abs(a[i] - a[0]) + 1);
    
    if (done[i][k]) return memo[i][k];
    done[i][k] = true;
    
    int ans = INT_MAX;
    for (int j = 0; j <= i; j++) {
        ans = min(ans, calc(j - 1, k - 1) + sq(abs(a[i] - a[j]) + 1));
    }
    
    return memo[i][k] = ans;
}



ll take_photos(int n, int m, int k, vec<int> r, vec<int> c) {
    for (int i = 0; i < 505; i++) for (int j = 0; j < 505; j++) done[i][j] = false;
    a.resize(n);
    sort(a.begin(), a.end());
    for (int i = 0; i < n; i++) a[i] = r[i], assert(r[i] == c[i]);
    
    return calc(n - 1, k);
}

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