Submission #67774

#	Time	Username	Problem	Language	Result	Execution time	Memory
67774		theknife2001	Boxes with souvenirs (IOI15_boxes)	C++17	20 / 100	2 ms	376 KiB

boxes

#include "boxes.h"
//#include "grader.cpp"
#include <bits/stdc++.h>

using namespace std;
const int N=1e7+55;
long long dp[N][2];
int n;

long long delivery(int N, int k, int L, int p[])
{
    n=N;
    int j=0;
    for(int j=0;j<n;j++)
        if(p[j])
        break;
    if(j==n)
        return 0;
    int x;
    long long temp=0;
    for(int i=0;i<n;i++)
    {
        x=k;
        while(x--&&i<n)
        {
            while(p[i]==0)
                i++;
            dp[i][0]=temp+p[i];
            i++;
        }
        i--;
        temp+=p[i]+min(p[i],L-p[i]);
    }
    temp=0;
    for(int i=n-1;i>=0;i--)
    {
        x=k;
        while(x--&&i>=0)
        {
            if(p[i]==0)
                break;
            dp[i][1]=temp+(L-p[i]);
            i--;
        }
        if(p[i]==0)
            break;
        i++;
        temp+=L-p[i]+min(p[i],L-p[i]);
    }
    int i=0;
    while(p[i]==0)
        i++;
    long long ans=dp[i][1]+min(p[i],L-p[i]);
    for(;i<n;i++)
    {
        ans=min(dp[i][0]+(i+1<n?dp[i+1][1]:0)+min(p[i],L-p[i])+(i+1<n?min(p[i+1],L-p[i+1]):0),ans);
    }
    return ans;
}
/*
3 2 7
1 2 5
*/

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:10:48: warning: declaration of 'N' shadows a global declaration [-Wshadow]
 long long delivery(int N, int k, int L, int p[])
                                                ^
boxes.cpp:6:11: note: shadowed declaration is here
 const int N=1e7+55;
           ^
boxes.cpp:14:13: warning: declaration of 'j' shadows a previous local [-Wshadow]
     for(int j=0;j<n;j++)
             ^
boxes.cpp:13:9: note: shadowed declaration is here
     int j=0;
         ^

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