Submission #621245

#	Time	Username	Problem	Language	Result	Execution time	Memory
621245		M_W	Boxes with souvenirs (IOI15_boxes)	C++17	20 / 100	1 ms	340 KiB

boxes

#include <bits/stdc++.h>
#include "boxes.h"
using namespace std;
long long cw[10000001], ccw[10000001];

long long delivery(int N, int K, int L, int p[]) {
	for(int i = 0; i < N; i++){
		if(i - K < 0) cw[i] = (p[i] * 1ll) << 1;
		else cw[i] = cw[i - K] + ((p[i] * 1ll) << 1);
	}
	
	for(int i = N - 1; i >= 0; i--){
		if(i + K > N - 1) ccw[i] = ((L - p[i]) * 1ll) << 1;
		else ccw[i] = ccw[i + K] + (((L - p[i]) * 1ll) << 1);
	}
	
	long long ans = min(cw[N - 1], ccw[0]);
	for(int i = 0; i < N - 1; i++) ans = min(ans, cw[i] + ccw[i + 1]);
	
	for(int i = 0; i + K + 1 < N; i++) ans = min(ans, cw[i] + ccw[i + K + 1] + (L * 1ll));
	if(K >= N) ans = min(ans, L * 1ll);
	
	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