Submission #604270

#	Time	Username	Problem	Language	Result	Execution time	Memory
604270		cheissmart	Boxes with souvenirs (IOI15_boxes)	C++14	10 / 100	1 ms	468 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>
#define F first
#define S second
#define V vector
#define PB push_back
#define EB emplace_back
#define MP make_pair
#define SZ(v) int((v).size())
#define ALL(v) (v).begin(), (v).end()

using namespace std;

typedef long long ll;
typedef pair<int, int> pi;
typedef V<int> vi;

const int INF = 1e9 + 7;
const ll oo = 1e18;

ll delivery(int n, int k, int l, int p[]) {
    vi a;
    for(int i = 0; i < n; i++)
        if(p[i]) a.PB(p[i]);
    n = SZ(a);

    vi x, y;
    for(int i = 0; i < n; i++) {
        if(a[i] < l - a[i]) {
            x.PB(a[i]);
        } else if(l - a[i] < a[i]) {
            y.PB(l - a[i]);
        }
    }
    auto go = [&] (vi tt) {
        sort(ALL(tt));
        V<ll> dp(SZ(tt) + 1);
        for(int i = 0; i < SZ(tt); i++) {
            dp[i + 1] = dp[max(0, i + 1 - k)] + tt[i] * 2;
        }
        V<ll> diff;
        for(int i = 0; i < SZ(tt); i++)
            diff.PB(dp[i + 1] - dp[i]);
        assert(is_sorted(ALL(diff)));
        return diff;
    };
    V<ll> dx = go(x), dy = go(y), aux(SZ(dx) + SZ(dy));
    merge(ALL(dx), ALL(dy), aux.begin());
    ll ans = 1LL * (n + k - 1) / k * l, sum = 0;
    for(int i = 0; i < SZ(aux); i++) {
        sum += aux[i];
        ans = min(ans, sum + 1LL * (n - i - 1 + k - 1) / k * l);
    }
    cerr << ans << endl;
    return ans;
}

• Subtask 1: 10 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 30