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Submission #100145

# Submission time Handle Problem Language Result Execution time Memory
100145 2019-03-09T15:18:30 Z luciocf Boxes with souvenirs (IOI15_boxes) C++14
10 / 100
 5 ms 384 KB 
#include <bits/stdc++.h>
#include "boxes.h"

using namespace std;

const int maxn = 2e7+10;

typedef long long ll;

int n, k;
int p[maxn];

ll pref[maxn], suf[maxn];

long long delivery(int N, int K, int L, int positions[])
{
	n = N, k = K;
	for (int i = 1; i <= n; i++)
		p[i] = positions[i-1];

	int mid = L/2;
	int last_p = 0, last_s = 0;

	if (p[1] <= mid) pref[1] = 2ll*p[1], last_p = 1;
	for (int i = 2; i <= n; i++)
	{
		if (p[i] > mid) break;

		pref[i] = 2ll*p[i] + pref[i-k];
		last_p = i;
	}

	if (p[n] > mid) suf[n] = 2ll*(L-p[n]), last_s = n;
	for (int i = n-1; i >= 1; i--)
	{
		if (p[i] <= mid) break;

		suf[i] = 2ll*(L-p[i]) + suf[i+k];
		last_s = i;
	}

	ll ans = pref[last_p] + suf[last_s];

	for (int i = 1; i <= n; i++)
	{
		ll aux = 1ll*i*L;

		for (int j = 1; j <= k; j++)
		{
			if (!last_p && !last_s) break;
			else if (!last_p) last_s++;
			else if (!last_s) last_p--;
			else if (p[last_p] > L-p[last_s]) last_p--;
			else last_s++;
		}

		aux += pref[last_p]+suf[last_s];
		ans = min(ans, aux);
	}

	return ans;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 384 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 384 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Incorrect 5 ms 384 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Incorrect 5 ms 384 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Incorrect 5 ms 384 KB Output isn't correct
9 Halted 0 ms 0 KB -