Submission #398119

#	Time	Username	Problem	Language	Result	Execution time	Memory
398119		MeGustaElArroz23	Boxes with souvenirs (IOI15_boxes)	C++14	0 / 100	1 ms	460 KiB

boxes

#include<bits/stdc++.h>
#include "boxes.h"
using namespace std;

typedef long long ll;
typedef vector<ll> vi;

ll delivery(int n,int k, int l, int sections[]){
    if (l==1) return 0;
    vi v(n);
    for (ll i=0;i<n;i++) v[i]=sections[i];
    v.push_back(0);
    v.push_back(l);
    sort(v.begin(),v.end());
    vi avances(k,0);
    vi sol(n+1);
    sol[0]=0;

   vi trusol(n+2,0);

    for (ll i=1;i<n+2;i++){
        if(v[i]<=l/2){
            avances[i%k]+=v[i]-v[i-1];
            sol[i]=sol[i-1]+avances[i%k];
            trusol[i]=2*sol[i];
        }
        else{
            if (i<=k) sol[i]=l;
            
            else sol[i]=trusol[i-k]+l;
            trusol[i]=sol[i];
        }
    }

    for (ll i=0;i<n+2;i++) v[i]=l-v[i];
    avances=vi(k,0);
    vi sol2(n+2,0);
    ll res=1e18;
    sol2[n+1]=0;
    vi trusol2(n+2);
    for (ll i=n;i>=0;i--){
        if(v[i]<=l/2){
            avances[i%k]+=v[i]-v[i+1];
            sol2[i]=sol2[i+1]+avances[i%k];
            trusol2[i]+=2*sol2[i];
        }
        else{
            if (i+k>n) sol2[i]=l;
            else sol2[i]=trusol2[i+k]+l;
            trusol2[i]+=sol2[i];
        }
    }

    for (ll i=0;i<n+1;i++) res=min(res,trusol[i]+trusol2[i+1]);
    
    cerr << res;
    return res;
}

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