Submission #142933

#	Time	Username	Problem	Language	Result	Execution time	Memory
142933		daniel920712	Boxes with souvenirs (IOI15_boxes)	C++14	20 / 100	2 ms	376 KiB

boxes

#include "boxes.h"
#include <stdio.h>
#include <iostream>

using namespace std;
bool have[10000005]={0};
long long delivery(int N, int K, int L, int p[])
{
    long long ans=0,t=0,how;
    int i,l=1e9+7,r=-1,j;
    for(i=0;i<N;i++)
    {
        if(p[i]<=L/2)
        {
            if((i+1)%K==0)
            {
                ans+=p[i]*2;
                for(j=i-K+1;j<=i;j++) have[j]=1;
                //printf("%lld\n",ans);
            }
        }
        else break;
    }
    for(i=N-1;i>=0;i--)
    {
        if(p[i]>L/2)
        {
            if((N-i)%K==0)
            {
                ans+=(L-p[i])*2;
                for(j=i;j-i<K;j++) have[j]=1;
                //printf("%lld\n",ans);
            }
        }
        else break;
    }
    for(j=0;j<N;j++)
    {
        if(have[j]==0)
        {
            l=min(l,j);
            r=max(r,j);
        }
    }
    t=1e18;
    if(r!=-1)
    {
        for(i=l;i<r;i++)
        {
            if((l-i+1)<=K&&(r-i)<=K)
            {
                how=p[i]*2;
                how+=(L-p[i+1])*2;
                t=min(t,how);
            }
        }
        if((r-l+1)<=K)
        {
            t=min(t,(long long) p[r]*2);
            t=min(t,(long long) (L-p[l])*2);
            t=min(t,(long long) L);
        }
        t=min(t,(long long) 2*L);
        ans+=t;
    }

    return ans;

}

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