Submission #132386

#	Time	Username	Problem	Language	Result	Execution time	Memory
132386		wilwxk	Aliens (IOI16_aliens)	C++14	12 / 100	142 ms	2552 KiB

aliens

#include "aliens.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

const int MAXN=510;
const ll INF=1e18;
vector<int> r, c;
ll memo[MAXN][MAXN];
ll respf;
int n, m, x;

ll dp(int ind, int k) {
	// printf("chama %d %d\n", ind, k);
	if(k<0) return INF; 
	if(ind==n) return 0;
	if(memo[ind][k]!=-1) return memo[ind][k];
	ll &resp=memo[ind][k];
	resp=INF;
	for(int j=ind; j<n; j++) {
		ll custo=r[j]-r[ind]+1; custo*=custo;
		resp=min(resp, custo+dp(j+1, k-1));
	}
	// printf("%d %d >> %lld\n", ind, k, resp);
	return resp;
}

ll take_photos(int N, int M, int K, vector<int> R, vector<int> C) {
    n=N; m=M; x=K;
    r=R; c=C;
    sort(r.begin(), r.end());
    memset(memo, -1, sizeof(memo));
    respf=dp(0, x);

    return respf;
}

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