Submission #96646

#	Time	Username	Problem	Language	Result	Execution time	Memory
96646		figter001	Boxes with souvenirs (IOI15_boxes)	C++14	0 / 100	2 ms	376 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
const int maxn = 1e6+50;

ll pre[maxn],suf[maxn];

long long delivery(int n, int k, int l, int p[]) {
	for(int i=0;i<n;i++){
		pre[i] = 2*p[i];
		if(i >= k)pre[i] += pre[i-k];
	}
	for(int i=n-1;i>=0;i--){
		suf[i] = 2ll*(n - p[i]);
		if(i + k < n)suf[i] += suf[i+k];
	}
	ll ans = suf[0];
	for(int i=0;i<n;i++){
		ans = min(ans,pre[i] + n + suf[i+k+1]);
		ans = min(ans,pre[i] + suf[i+1]);
	}
	return ans;
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:11:38: warning: unused parameter 'l' [-Wunused-parameter]
 long long delivery(int n, int k, int l, int p[]) {
                                      ^

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