Cod sursa(job #1191129)

Utilizator assa98Andrei Stanciu assa98 Data 26 mai 2014 18:05:38
Problema Avioane Scor 40
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.94 kb
#include <fstream>
#include <algorithm>
using namespace std;

ifstream fin("avioane.in");
ofstream fout("avioane.out");

const int MAX_N = 100100;

int v[MAX_N];
int p[MAX_N];
int n;

int get(int poz, int st, int dr) {
    int ans = (n - poz + 1) * v[poz];
    int q = poz;
    for(int i = poz; i <= dr; i++) {
        if((i - poz) * v[poz] + (n - i +1) * v[i] > ans) {
            ans = (i - poz) * v[poz] + (n - i +1) * v[i];
            q = i;
        }
    }
    p[poz] = ans;
    return q;
}

void solve(int st, int dr, int a, int b) {
    if(st > dr) {
        return;
    }
    int mij = (st + dr) / 2;
    int m = get(mij, a, b);
    solve(st, mij-1, a, m);
    solve(mij+1, dr, m, b);
}

int main() {
    fin >> n;
    for(int i = 1; i <= n; i++) {
        fin >> v[i];
    }
    sort(v + 1, v + n + 1);
    
    solve(1, n, 1, n);
   
    int ans = 0;
    for(int i = 1; i <= n; i++) { 
        ans = max(ans, p[i]);
    }
    fout << ans;
    return 0;
}