Submission #800709

#	Time	Username	Problem	Language	Result	Execution time	Memory
800709		firewater	Boxes with souvenirs (IOI15_boxes)	C++14	50 / 100	42 ms	9916 KiB

boxes

#include "boxes.h"
#include <stdio.h>
#include <stdlib.h>
#include<cstdio>
#include<cstring>
#include<iostream>
#include<algorithm>
#define ll long long
using namespace std;




















#define N 100100
ll n,k,ans,x,len,a[N],b[N];
ll solve1(ll x)
{
    ll num=0;
    while(x-k+1>=1)
    {
        num+=min(a[x]*2,len);
        x-=k;
    }
    if(x<1)return num;
    else return num+min(a[x]*2,len);
}
ll solve2(ll x)
{
    ll now=n+1,num=0;
    while(x+k-1<=n)
    {
        num+=min((len-a[x])*2,len);
        x+=k;
    }
    if(x>n)return num;
    else return num+min((len-a[x])*2,len);
}
long long delivery(int NN, int K, int L, int ppp[]) {
    n=NN;
    k=K;
    len=L;
    for(ll i=1;i<=n;++i)
        a[i]=ppp[i-1];
    ans=solve1(n);
    for(ll i=0;i<=n;++i){
        ans=min(ans,solve1(i)+solve2(i+1));
    //     printf("%lld %lld %lld\n",i,solve1(i),solve2(i+1));
    }
    return ans;
}

Compilation message (stderr)

boxes.cpp: In function 'long long int solve1(long long int)':
boxes.cpp:32:14: warning: declaration of 'x' shadows a global declaration [-Wshadow]
   32 | ll solve1(ll x)
      |              ^
boxes.cpp:31:12: note: shadowed declaration is here
   31 | ll n,k,ans,x,len,a[N],b[N];
      |            ^
boxes.cpp: In function 'long long int solve2(long long int)':
boxes.cpp:43:14: warning: declaration of 'x' shadows a global declaration [-Wshadow]
   43 | ll solve2(ll x)
      |              ^
boxes.cpp:31:12: note: shadowed declaration is here
   31 | ll n,k,ans,x,len,a[N],b[N];
      |            ^
boxes.cpp:45:8: warning: unused variable 'now' [-Wunused-variable]
   45 |     ll now=n+1,num=0;
      |        ^~~

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