Submission #1005105

#	Time	Username	Problem	Language	Result	Execution time	Memory
1005105		Gray	Boxes with souvenirs (IOI15_boxes)	C++17	100 / 100	460 ms	372252 KiB

boxes

#include "boxes.h"
#include <cassert>
#include <iostream>
#include <vector>
#include <algorithm>
#define ll long long
#define ff first
#define ss second
#define ln "\n"
using namespace std;
vector<ll> pos;
ll n, k, l;
long long delivery(int N, int K, int L, int p[]) {
    n=N; k=K; l=L;
    pos.resize(n);
    for (ll i=0; i<n; i++){
        pos[i] = p[i];
    }
    vector<ll> cl(n), acl(n);
    for (ll i=0; i<n; i++){
        cl[i] = pos[i]*2;
        if (i>=k) cl[i]+=cl[i-k];
    }
    for (ll i=n-1; i>=0; i--){
        acl[i]=(l-pos[i])*2;
        if (i+k<n) acl[i]+=acl[i+k];
    }
    ll ans=acl[0];
    for (ll i=0; i<n; i++){
        ll res = cl[i];
        if (i+1<n) res+=acl[i+1];
        ans=min(ans, res);
    }
    for (ll i=k; i<=n; i++){
        ll res=l;
        if (i-k-1>=0) res+=cl[i-k-1];
        if (i<n) res+=acl[i];
        ans=min(ans, res);
    }
    return ans;
}

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