Submission #1264297

#	Time	Username	Problem	Language	Result	Execution time	Memory
1264297		liangjeremy	Boxes with souvenirs (IOI15_boxes)	C++20	100 / 100	397 ms	274376 KiB

boxes

#include<bits/stdc++.h>
#define fi first
#define se second
using namespace std;
using db=double;
using ll=int64_t;
using sll=__int128;
using lb=long double;

long long delivery(int n, int k, int l, int a[]){
#define int long long
	vector<int>v(n+1); vector<int>dpl(n+1); vector<int>dpr(n+2);
	for(int i=0; i<n; i++)v[i+1]=a[i];
	for(int i=1; i<=n; i++){
		dpl[i]=v[i]+dpl[max(0ll,i-k)]; 
	}
	for(int i=n; i>=1; i--){
		dpr[i]=l-v[i]+dpr[min((int)n+1,i+k)]; 
	}
	int ans=1e18;
	for(int i=0; i<=n; i++){
		ans=min(ans,2*dpl[i]+2*dpr[i+1]); 
	}
	for(int i=0; i+k<=n; i++){
		ans=min(ans,2*dpl[i]+2*dpr[i+k+1]+l);
	}
	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