Submission #618922

#	Time	Username	Problem	Language	Result	Execution time	Memory
618922		A_D	Boxes with souvenirs (IOI15_boxes)	C++14	10 / 100	1 ms	340 KiB

boxes

#include "boxes.h"

#include <bits/stdc++.h>


using namespace std;



const int N=1e7+10;


long long pre[N];
long long suf[N];



long long delivery(int N, int K, int L, int p[]) {

    long long ans=1e18;

    long long me=0,cur=0,lst=0;


    for(int i=0;i<N;i++){
        long long h=p[i];
        me+=h-lst;
        cur++;
        pre[i]=me+min(h,L-h);
        if(cur==K){
            me+=min(h,L-h);
            cur=0;
            me+=min(h,L-h);
        }
        lst=p[i];
    }
    ans=pre[N-1];

    me=0,cur=0,lst=L;

    for(int i=N-1;i>=0;i--){
        long long h=p[i];
        me+=abs(h-lst);
        cur++;
        suf[i]=me+min(h,L-h);
        if(cur==K){
            me+=min(h,L-h);
            cur=0;
            me+=min(h,L-h);
        }
        lst=p[i];
    }

    for(int i=0;i<N-1;i++){
        ans=min(ans,pre[i]+suf[i+1]);
    }


    return ans;
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:18:24: warning: declaration of 'N' shadows a global declaration [-Wshadow]
   18 | long long delivery(int N, int K, int L, int p[]) {
      |                    ~~~~^
boxes.cpp:10:11: note: shadowed declaration is here
   10 | const int N=1e7+10;
      |           ^

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