Submission #582414

#	Time	Username	Problem	Language	Result	Execution time	Memory
582414		kamelfanger83	Holiday (IOI14_holiday)	C++14	7 / 100	45 ms	65536 KiB

holiday

#include <iostream>
#include <vector>
#include "holiday.h"

#define int long long

using namespace std;

vector<vector<int>> dprr;
vector<vector<int>> dplr;
vector<vector<int>> dprs;
vector<vector<int>> dpls;
vector<int> gattraction;
int gn;

int maxrightret(int i, int j){
    if(j <=0 || i == gn) return 0;
    if(dprr[i][j] != -1) return dprr[i][j];
    int best = maxrightret(i+1, j-2);
    if(j >= 1) best = max(best, maxrightret(i+1, j-3)+gattraction[i]);
    return dprr[i][j] = best;
}

int maxrightsta(int i, int j){
    if(j <=0 || i == gn) return 0;
    if(dprs[i][j] != -1) return dprs[i][j];
    int best = maxrightsta(i+1, j-1);
    if(j >= 1) best = max(best, maxrightsta(i+1, j-2)+gattraction[i]);
    return dprs[i][j] = best;
}

int maxleftret(int i, int j){
    if(j <= 0 || i == -1) return 0;
    if(dplr[i][j] != -1) return dplr[i][j];
    int best = maxleftret(i-1, j-2);
    if(j >= 1) best = max(best, maxleftret(i-1, j-3)+gattraction[i]);
    return dplr[i][j] = best;
}

int maxleftsta(int i, int j){
    if(j <= 0 || i == -1) return 0;
    if(dpls[i][j] != -1) return dpls[i][j];
    int best = maxleftsta(i-1, j-1);
    if(j >= 1) best = max(best, maxleftsta(i-1, j-2)+gattraction[i]);
    return dpls[i][j] = best;
}

int findMaxAttraction(signed n, signed start, signed d, signed attraction[]){
    gattraction = vector<int> (n);
    for(int attracter = 0; attracter < n; attracter++) gattraction[attracter] = attraction[attracter];
    dprr = vector<vector<int>> (n, vector<int> (d+1, -1));
    dplr = vector<vector<int>> (n, vector<int> (d+1, -1));
    dprs = vector<vector<int>> (n, vector<int> (d+1, -1));
    dpls = vector<vector<int>> (n, vector<int> (d+1, -1));
    gn = n;
    int best = 0;
    for(int left = 0; left <= d; left++){
        best = max(best, maxleftret(start-1,left - 2) + maxrightsta(start+1, d-left-1));
        if(left > 0) best = max(best, maxleftret(start-1,left - 3) + maxrightsta(start+1, d-left-1) + attraction[start]);
    }
    for(int right = 0; right <= d; right++){
        best = max(best, maxleftsta(start-1, d-right-1) + maxrightret(start+1, right-2));
        if(right > 0) best = max(best, maxleftsta(start-1,d-right-1) + maxrightret(start+1, right-3) + attraction[start]);
    }
    return best;
}

/*signed main(){
    int n, start, d; cin >> n >> start >> d;
    signed *attraction = new signed[n];
    for(int reader = 0; reader < n; reader++) cin >> attraction[reader];
    cout << findMaxAttraction(n,start,d,attraction);
}*/

• Subtask 1: 7 / 7
• Subtask 2: 0 / 23
• Subtask 3: 0 / 17
• Subtask 4: 0 / 53