Submission #296377

#	Time	Username	Problem	Language	Result	Execution time	Memory
296377		TMJN	Boxes with souvenirs (IOI15_boxes)	C++17	100 / 100	560 ms	237840 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>
using namespace std;

long long l[10000000];
long long r[10000000];

long long delivery(int N, int K, int L, int p[]) {
	long long mn;
	for(int i=0;i<K&&i<N;i++){
		l[i]=p[i];
		r[N-1-i]=L-p[N-1-i];
	}
	for(int i=K;i<N;i++){
		l[i]=l[i-K]+p[i];
		r[N-1-i]=r[N-1-i+K]+L-p[N-1-i];
	}
	for(int i=0;i<N;i++){
		l[i]*=2;
		r[i]*=2;
	}
	mn=min(l[N-1],r[0]);
	for(int i=0;i<N-1;i++){
		mn=min(mn,l[i]+r[i+1]);
	}
	if(K==N){
		mn=min(mn,(long long)L);
	}
	mn=min(mn,L+r[min(K,N-1)]);
	for(int i=0;i<N;i++){
		mn=min(mn,l[i]+L+((i+K+1>=N)?0:r[i+K+1]));
	}
	return mn;
}

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