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답안 #410886

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
410886 2021-05-23T21:34:33 Z 534351 기지국 (IOI20_stations) C++17
76 / 100
 1166 ms 864 KB 
#include "stations.h"
#include <bits/stdc++.h>

using namespace std;

template<class T, class U>
void ckmin(T &a, U b)
{
    if (a > b) a = b;
}

template<class T, class U>
void ckmax(T &a, U b)
{
    if (a < b) a = b;
}

#define MP make_pair
#define PB push_back
#define LB lower_bound
#define UB upper_bound
#define fi first
#define se second
#define FOR(i, a, b) for (auto i = (a); i < (b); i++)
#define FORD(i, a, b) for (auto i = (a) - 1; i >= (b); i--)
#define SZ(x) ((int) (x).size())
#define ALL(x) (x).begin(), (x).end()

const int MAXN = 1013;
const int INF = 1e9 + 7;

typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<pii> vpi;
typedef vector<pll> vpl;

int N, K, T;
vi edge[MAXN];
int st[MAXN], ft[MAXN], depth[MAXN];
vi ans;
//inside each vtx, we store start time and finish time.

void dfs(int u, int p)
{
	st[u] = T;
	T++;
	for (int v : edge[u])
	{
		if (v == p) continue;
        depth[v] = depth[u] + 1;
		dfs(v, u);
	}
    ft[u] = T;
    T++;
}

vi label(int n, int k, vi U, vi V)
{
	N = n; K = k; T = 0;
	FOR(i, 0, N)
	{
		edge[i].clear();
	}
	ans.clear();
	FOR(i, 0, N - 1)
	{
		int u = U[i], v = V[i];
		edge[u].PB(v);
		edge[v].PB(u);
	}
    depth[0] = 0;
	dfs(0, N);
	ans.resize(N);
    FOR(i, 0, N)
    {
        if (depth[i] % 2)
        {
            ans[i] = ft[i];
        }
        else
        {
            ans[i] = st[i];
        }
    }
	return ans;
}

int find_next_station(int u, int v, vi ch)
{
    sort(ALL(ch));
    //figure out if you're a st or ft.
    //case 1: you're an st. then any neighbor will have ft > u.
    if (u < ch[0])
    {
        int ft = -1;
        //you're an st. your ft is the second largest neighbor unless you are the root, and then it's the largest + 1.
        if (u == 0)
        {
            ft = ch.back() + 1;
        }
        else
        {
            ft = (SZ(ch) > 1 ? ch[SZ(ch) - 2] : u) + 1;
        }
        if (u <= v && v <= ft)
        {
            //you're going to an ft, which still is >= v.
            FOR(i, 0, SZ(ch))
            {
                if (ch[i] >= v) return ch[i];
            }
        }
        else
        {
            return ch.back();
        }
    }
    else
    {
        //you're an ft. your st is the smallest child - 1, unless you only have a parent.
        int st = -1;
        if (SZ(ch) == 1)
        {
            st = ch[0] + 1;
        }
        else
        {
            st = ch[0] - 1;
        }
        if (st <= v && v <= u)
        {
            //you're going to an st, which is <= v.
            FORD(i, SZ(ch), 0)
            {
                if (ch[i] <= v) return ch[i];
            }
        }
        else
        {
            return ch[0];
        }
    }
    assert(false);
}

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 3 ms 340 KB Invalid labels (values out of range). scenario=2, k=1000, vertex=1, label=1990
2 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 4 ms 328 KB Invalid labels (values out of range). scenario=0, k=1000, vertex=1, label=1022
2 Halted 0 ms 0 KB -

Subtask #3
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 654 ms 640 KB Output is correct
2 Correct 453 ms 648 KB Output is correct
3 Correct 1134 ms 644 KB Output is correct
4 Correct 803 ms 508 KB Output is correct
5 Correct 779 ms 528 KB Output is correct
6 Correct 516 ms 768 KB Output is correct
7 Correct 672 ms 508 KB Output is correct
8 Correct 3 ms 596 KB Output is correct
9 Correct 6 ms 448 KB Output is correct
10 Correct 2 ms 468 KB Output is correct
11 Correct 644 ms 400 KB Output is correct
12 Correct 560 ms 760 KB Output is correct
13 Correct 529 ms 840 KB Output is correct
14 Correct 551 ms 504 KB Output is correct
15 Correct 66 ms 528 KB Output is correct
16 Correct 70 ms 528 KB Output is correct
17 Correct 139 ms 528 KB Output is correct

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1124 ms 508 KB Output is correct
2 Correct 794 ms 516 KB Output is correct
3 Correct 649 ms 508 KB Output is correct
4 Correct 3 ms 596 KB Output is correct
5 Correct 5 ms 448 KB Output is correct
6 Correct 2 ms 468 KB Output is correct
7 Correct 815 ms 648 KB Output is correct
8 Correct 1027 ms 400 KB Output is correct
9 Correct 788 ms 400 KB Output is correct
10 Correct 825 ms 528 KB Output is correct
11 Correct 7 ms 608 KB Output is correct
12 Correct 5 ms 468 KB Output is correct
13 Correct 8 ms 596 KB Output is correct
14 Correct 4 ms 468 KB Output is correct
15 Correct 2 ms 596 KB Output is correct
16 Correct 602 ms 520 KB Output is correct
17 Correct 586 ms 516 KB Output is correct
18 Correct 693 ms 528 KB Output is correct
19 Correct 561 ms 512 KB Output is correct
20 Correct 580 ms 400 KB Output is correct

Subtask #5
50.0 / 61.0

# 결과 실행 시간 메모리 Grader output
1 Partially correct 616 ms 676 KB Partially correct
2 Partially correct 496 ms 624 KB Partially correct
3 Correct 1103 ms 528 KB Output is correct
4 Correct 775 ms 516 KB Output is correct
5 Correct 681 ms 528 KB Output is correct
6 Partially correct 587 ms 628 KB Partially correct
7 Partially correct 487 ms 520 KB Partially correct
8 Correct 3 ms 596 KB Output is correct
9 Correct 5 ms 476 KB Output is correct
10 Correct 2 ms 596 KB Output is correct
11 Partially correct 471 ms 508 KB Partially correct
12 Partially correct 547 ms 528 KB Partially correct
13 Correct 1166 ms 508 KB Output is correct
14 Correct 771 ms 516 KB Output is correct
15 Correct 573 ms 528 KB Output is correct
16 Partially correct 570 ms 512 KB Partially correct
17 Correct 647 ms 512 KB Output is correct
18 Partially correct 590 ms 720 KB Partially correct
19 Partially correct 627 ms 736 KB Partially correct
20 Partially correct 454 ms 520 KB Partially correct
21 Correct 68 ms 528 KB Output is correct
22 Partially correct 91 ms 572 KB Partially correct
23 Partially correct 144 ms 656 KB Partially correct
24 Correct 9 ms 528 KB Output is correct
25 Correct 7 ms 596 KB Output is correct
26 Correct 5 ms 596 KB Output is correct
27 Correct 4 ms 604 KB Output is correct
28 Correct 2 ms 596 KB Output is correct
29 Correct 555 ms 516 KB Output is correct
30 Correct 554 ms 528 KB Output is correct
31 Correct 539 ms 512 KB Output is correct
32 Correct 551 ms 528 KB Output is correct
33 Correct 551 ms 528 KB Output is correct
34 Partially correct 436 ms 620 KB Partially correct
35 Partially correct 442 ms 632 KB Partially correct
36 Partially correct 512 ms 640 KB Partially correct
37 Partially correct 626 ms 792 KB Partially correct
38 Partially correct 515 ms 640 KB Partially correct
39 Partially correct 506 ms 720 KB Partially correct
40 Partially correct 521 ms 748 KB Partially correct
41 Partially correct 602 ms 736 KB Partially correct
42 Partially correct 61 ms 528 KB Partially correct
43 Partially correct 153 ms 528 KB Partially correct
44 Partially correct 179 ms 516 KB Partially correct
45 Partially correct 211 ms 528 KB Partially correct
46 Partially correct 386 ms 528 KB Partially correct
47 Partially correct 388 ms 620 KB Partially correct
48 Partially correct 82 ms 748 KB Partially correct
49 Partially correct 77 ms 864 KB Partially correct