Submission #386627

#	Time	Username	Problem	Language	Result	Execution time	Memory
386627		Keshi	Boxes with souvenirs (IOI15_boxes)	C++17	100 / 100	788 ms	203992 KiB

boxes

//In the name of God
#include <bits/stdc++.h>
#include "boxes.h"
using namespace std;

typedef long long ll;
typedef pair<ll, ll> pll;

const ll maxn = 1e7 + 100;
const ll mod = 1e9 + 7;
const ll inf = 1e18;

#define fast_io ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define file_io freopen("input.txt", "r+", stdin);freopen("output.txt", "w+", stdout);
#define pb push_back
#define Mp make_pair
#define F first
#define S second
#define Sz(x) ll((x).size())
#define all(x) (x).begin(), (x).end()

ll dp1[maxn], dp2[maxn], mn[maxn];

long long delivery(int n, int k, int l, int p[]) {
	ll L = l;
	for(ll i = 0; i < k; i++){
		dp1[i] = p[i] * 2;
		dp2[n - 1 - i] = (L - p[n - 1 - i]) * 2;
	}
	for(ll i = k; i < n; i++){
		dp1[i] = dp1[i - k] + p[i] * 2;
		dp2[n - 1 - i] = dp2[n - 1 - i + k] + (L - p[n - 1 - i]) * 2;
	}
	fill(mn, mn + k, inf);
	ll mnn = inf;
	ll ans = min(dp1[n - 1], dp2[0]);
	ans = min(ans, L * ((n + k - 1) / k));
	ll p1 = 0, p2 = k - 1;
	for(ll i = 0; i < n; i++){
		ans = min(ans, L * ((i - 1) / k) + mn[p2] + dp2[i]);
		ans = min(ans, L * ((i - 1) / k) + mnn + dp2[i] + L);
		ans = min(ans, dp2[i] + L * ((i + k - 1) / k));
		ans = min(ans, dp1[i] + L * ((n - i - 1 + k - 1) / k));
		mn[p1] = min(mn[p1], dp1[i] - L * (i / k));
		mnn = min(mnn, mn[p1]);
		p1++;
		if(p1 == k) p1 = 0;
		p2++;
		if(p2 == k) p2 = 0;
	}
    return ans;
}

/*int main(){

	int n, k, L, p[100];
	cin >> n >> k >> L;
	for(ll i = 0; i < n; i++){
		cin >> p[i];
	}

	cout << "ans : " << delivery(n, k, L, p) << "\n";


    return 0;
}*/

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