Submission #134722

#	Time	Username	Problem	Language	Result	Execution time	Memory
134722		Boxworld	Boxes with souvenirs (IOI15_boxes)	C++14	100 / 100	466 ms	68060 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>
using namespace std;
long long delivery(int N, int K, int L, int p[]){
    int m=-1;
    long long ans=0;
    for (int i=0;i<N;i++)if (p[i]*2<L)m=i;
	for (int i=m;i>=0;i-=K)ans+=p[i]*2;
	for (int i=m+1;i<N;i+=K)ans+=(L-p[i])*2;
	if (m==-1||m==N-1)return ans;
	for (int t=0;t<K;t++){
//		printf("Case:%d\n",t);
		long long ans1=0;
		int l=0,r=t;
		for (;;){
			if (r<=m)ans1+=2*p[r];
			if (l<=m&&r>m)ans1+=L;
			if (l>m)ans1+=2*(L-p[l]);
		//	printf("l=%d r=%d ans=%d\n",l,r,ans1);
			if (r==N-1)break;
			l=r+1;r+=K;
			if (r>N-1)r=N-1;
		}
		ans=min(ans,ans1);
	}
	return ans;
}

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