Submission #30562

#	Time	Username	Problem	Language	Result	Execution time	Memory
30562		inqr	Boxes with souvenirs (IOI15_boxes)	C++14	20 / 100	3 ms	376 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define rt insert
#define st first
#define nd second
#define ll long long
#define pii pair < int , int >
#define DB printf("debug\n");
#define umax( x , y ) x = max( x , (y) )
#define umin( x , y ) x = min( x , (y) )
#define all(x) x.begin() , x.end()
#define MAXN 10000005
using namespace std;
ll art[MAXN];
ll azl[MAXN];
long long delivery(int N, int K, int L, int p[]) {
	int kn=K;
	ll tm=0;
	ll ans=1e18;
	for(int i=0;i<N;i++){
		if(i==0)tm+=p[i];
		else tm+=p[i]-p[i-1];
		art[i]=tm+p[i];
		if(--kn==0){
			tm+=2*p[i];
			kn=K;
		}
		if(i==N-1)ans=min(ans,art[i]);
		//printf("i=%d p=%d kn=%d art=%lld\n",i,p[i],kn,art[i]);
	}
	kn=K;tm=0;
	for(int i=N-1;i>=0;i--){
		if(i==N-1)tm+=(L-p[i]);
		else tm+=p[i+1]-p[i];
		azl[i]=tm+(L-p[i]);
		if(--kn==0){
			tm+=2*(L-p[i]);
			kn=K;
		}
		if(i==0)ans=min(ans,azl[i]);
		//printf("i=%d p=%d kn=%d azl=%lld\n",i,p[i],kn,azl[i]);
	}
	for(int i=0;i<N;i++){
		if(ans>art[i]+azl[i+1]){
			//printf("1: i=%d\n",i);
			ans=art[i]+azl[i+1];
		}
	}
	for(int i=0;i<N;i++){
		if(i+K+1<=N && ans>art[i]+L+azl[i+K+1]){
			//printf("2: i=%d\n",i);
			ans=art[i]+L+azl[i+K+1];
		}
	}
	umin(ans,art[N-1-K]+L);
	umin(ans,azl[K]+L);
	//cout<<ans<<endl;
    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