oj.uz

Submission #345064

# Submission time Handle Problem Language Result Execution time Memory
345064 2021-01-07T01:59:46 Z Kevin_Zhang_TW Race (IOI11_race) C++17
100 / 100
 530 ms 83180 KB 
#include "race.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define pb emplace_back
#define AI(i) begin(i), end(i)
template<class T> bool chmin(T &a, T b) { return b < a ? (a = b, true) : false; }
template<class T> bool chmax(T &a, T b) { return a < b ? (a = b, true) : false; }
#ifdef KEV
#define DE(args...) kout("[ " + string(#args) + " ] = ", args)
void kout() { cerr << endl; }
template<class T, class ...U> void kout(T a, U ...b) { cerr << a << ' ', kout(b...); }
template<class T> void debug(T L, T R) { while (L != R) cerr << *L << " \n"[next(L) == R], ++L; }
#else
#define DE(...) 0
#define debug(...) 0
#endif
const int MAX_N = 300010, inf = 1e9;

vector<pair<int,int>> edge[MAX_N];

map<ll,int> amp[MAX_N];

int k;

int dfs(int x, int lst = -1, ll len = 0) {
	static int dep;
	++dep;

	DE(x, dep, len);

	int res = inf;

	auto &cur = amp[x]; cur[len] = dep;

	for (auto [u, w] : edge[x]) if (u != lst) {
		chmin(res, dfs(u, x, len + w));
		auto &nxt = amp[u];

		if (cur.size() < nxt.size()) swap(cur, nxt);

		for (auto [L, D] : nxt) {
			if (cur.count(k + 2 * len - L))
				chmin(res, D + cur[k + 2 * len - L] - 2 * dep);
		}
		for (auto [L, D] : nxt)
			if (cur.count(L))
				chmin(cur[L], D);
			else cur[L] = D;
		nxt.clear();
	}
//	if (false) if (cur.count(k + len)) {
//		DE(dep, cur[k + len]);
//		chmin(res, cur[k + len] - dep);
//	}
	--dep;

	return res;
}

int best_path(int N, int K, int H[][2], int L[]) {
	static int cnt;
	assert(++cnt == 1);
	for (int i = 0;i+1 < N;++i) {
		int a = H[i][0], b = H[i][1], w = L[i];
		edge[a].pb(b, w);
		edge[b].pb(a, w);
	}
	k = K;
	int res = dfs(0);
	return res == inf ? -1 : res;
}

Compilation message

race.cpp: In function 'int dfs(int, int, ll)':
race.cpp:15:17: warning: statement has no effect [-Wunused-value]
   15 | #define DE(...) 0
      |                 ^
race.cpp:30:2: note: in expansion of macro 'DE'
   30 |  DE(x, dep, len);
      |  ^~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 21484 KB Output is correct
2 Correct 15 ms 21484 KB Output is correct
3 Correct 16 ms 21484 KB Output is correct
4 Correct 16 ms 21484 KB Output is correct
5 Correct 15 ms 21484 KB Output is correct
6 Correct 15 ms 21484 KB Output is correct
7 Correct 15 ms 21484 KB Output is correct
8 Correct 15 ms 21484 KB Output is correct
9 Correct 15 ms 21484 KB Output is correct
10 Correct 15 ms 21484 KB Output is correct
11 Correct 15 ms 21484 KB Output is correct
12 Correct 16 ms 21484 KB Output is correct
13 Correct 15 ms 21484 KB Output is correct
14 Correct 17 ms 21632 KB Output is correct
15 Correct 15 ms 21484 KB Output is correct
16 Correct 15 ms 21484 KB Output is correct
17 Correct 15 ms 21484 KB Output is correct
18 Correct 15 ms 21504 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 21484 KB Output is correct
2 Correct 15 ms 21484 KB Output is correct
3 Correct 16 ms 21484 KB Output is correct
4 Correct 16 ms 21484 KB Output is correct
5 Correct 15 ms 21484 KB Output is correct
6 Correct 15 ms 21484 KB Output is correct
7 Correct 15 ms 21484 KB Output is correct
8 Correct 15 ms 21484 KB Output is correct
9 Correct 15 ms 21484 KB Output is correct
10 Correct 15 ms 21484 KB Output is correct
11 Correct 15 ms 21484 KB Output is correct
12 Correct 16 ms 21484 KB Output is correct
13 Correct 15 ms 21484 KB Output is correct
14 Correct 17 ms 21632 KB Output is correct
15 Correct 15 ms 21484 KB Output is correct
16 Correct 15 ms 21484 KB Output is correct
17 Correct 15 ms 21484 KB Output is correct
18 Correct 15 ms 21504 KB Output is correct
19 Correct 15 ms 21484 KB Output is correct
20 Correct 14 ms 21612 KB Output is correct
21 Correct 16 ms 21484 KB Output is correct
22 Correct 16 ms 21632 KB Output is correct
23 Correct 16 ms 21612 KB Output is correct
24 Correct 16 ms 21612 KB Output is correct
25 Correct 16 ms 21612 KB Output is correct
26 Correct 16 ms 21612 KB Output is correct
27 Correct 15 ms 21484 KB Output is correct
28 Correct 18 ms 21612 KB Output is correct
29 Correct 16 ms 21612 KB Output is correct
30 Correct 20 ms 21612 KB Output is correct
31 Correct 16 ms 21612 KB Output is correct
32 Correct 16 ms 21612 KB Output is correct
33 Correct 16 ms 21612 KB Output is correct
34 Correct 16 ms 21612 KB Output is correct
35 Correct 16 ms 21612 KB Output is correct
36 Correct 15 ms 21612 KB Output is correct
37 Correct 15 ms 21612 KB Output is correct
38 Correct 16 ms 21612 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 21484 KB Output is correct
2 Correct 15 ms 21484 KB Output is correct
3 Correct 16 ms 21484 KB Output is correct
4 Correct 16 ms 21484 KB Output is correct
5 Correct 15 ms 21484 KB Output is correct
6 Correct 15 ms 21484 KB Output is correct
7 Correct 15 ms 21484 KB Output is correct
8 Correct 15 ms 21484 KB Output is correct
9 Correct 15 ms 21484 KB Output is correct
10 Correct 15 ms 21484 KB Output is correct
11 Correct 15 ms 21484 KB Output is correct
12 Correct 16 ms 21484 KB Output is correct
13 Correct 15 ms 21484 KB Output is correct
14 Correct 17 ms 21632 KB Output is correct
15 Correct 15 ms 21484 KB Output is correct
16 Correct 15 ms 21484 KB Output is correct
17 Correct 15 ms 21484 KB Output is correct
18 Correct 15 ms 21504 KB Output is correct
19 Correct 129 ms 26348 KB Output is correct
20 Correct 132 ms 27756 KB Output is correct
21 Correct 132 ms 27884 KB Output is correct
22 Correct 130 ms 27756 KB Output is correct
23 Correct 162 ms 28396 KB Output is correct
24 Correct 143 ms 28012 KB Output is correct
25 Correct 131 ms 40684 KB Output is correct
26 Correct 91 ms 52224 KB Output is correct
27 Correct 227 ms 34668 KB Output is correct
28 Correct 325 ms 83180 KB Output is correct
29 Correct 324 ms 81388 KB Output is correct
30 Correct 228 ms 34540 KB Output is correct
31 Correct 227 ms 34540 KB Output is correct
32 Correct 288 ms 35052 KB Output is correct
33 Correct 253 ms 34212 KB Output is correct
34 Correct 404 ms 47724 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 21484 KB Output is correct
2 Correct 15 ms 21484 KB Output is correct
3 Correct 16 ms 21484 KB Output is correct
4 Correct 16 ms 21484 KB Output is correct
5 Correct 15 ms 21484 KB Output is correct
6 Correct 15 ms 21484 KB Output is correct
7 Correct 15 ms 21484 KB Output is correct
8 Correct 15 ms 21484 KB Output is correct
9 Correct 15 ms 21484 KB Output is correct
10 Correct 15 ms 21484 KB Output is correct
11 Correct 15 ms 21484 KB Output is correct
12 Correct 16 ms 21484 KB Output is correct
13 Correct 15 ms 21484 KB Output is correct
14 Correct 17 ms 21632 KB Output is correct
15 Correct 15 ms 21484 KB Output is correct
16 Correct 15 ms 21484 KB Output is correct
17 Correct 15 ms 21484 KB Output is correct
18 Correct 15 ms 21504 KB Output is correct
19 Correct 15 ms 21484 KB Output is correct
20 Correct 14 ms 21612 KB Output is correct
21 Correct 16 ms 21484 KB Output is correct
22 Correct 16 ms 21632 KB Output is correct
23 Correct 16 ms 21612 KB Output is correct
24 Correct 16 ms 21612 KB Output is correct
25 Correct 16 ms 21612 KB Output is correct
26 Correct 16 ms 21612 KB Output is correct
27 Correct 15 ms 21484 KB Output is correct
28 Correct 18 ms 21612 KB Output is correct
29 Correct 16 ms 21612 KB Output is correct
30 Correct 20 ms 21612 KB Output is correct
31 Correct 16 ms 21612 KB Output is correct
32 Correct 16 ms 21612 KB Output is correct
33 Correct 16 ms 21612 KB Output is correct
34 Correct 16 ms 21612 KB Output is correct
35 Correct 16 ms 21612 KB Output is correct
36 Correct 15 ms 21612 KB Output is correct
37 Correct 15 ms 21612 KB Output is correct
38 Correct 16 ms 21612 KB Output is correct
39 Correct 129 ms 26348 KB Output is correct
40 Correct 132 ms 27756 KB Output is correct
41 Correct 132 ms 27884 KB Output is correct
42 Correct 130 ms 27756 KB Output is correct
43 Correct 162 ms 28396 KB Output is correct
44 Correct 143 ms 28012 KB Output is correct
45 Correct 131 ms 40684 KB Output is correct
46 Correct 91 ms 52224 KB Output is correct
47 Correct 227 ms 34668 KB Output is correct
48 Correct 325 ms 83180 KB Output is correct
49 Correct 324 ms 81388 KB Output is correct
50 Correct 228 ms 34540 KB Output is correct
51 Correct 227 ms 34540 KB Output is correct
52 Correct 288 ms 35052 KB Output is correct
53 Correct 253 ms 34212 KB Output is correct
54 Correct 404 ms 47724 KB Output is correct
55 Correct 28 ms 22508 KB Output is correct
56 Correct 21 ms 22124 KB Output is correct
57 Correct 76 ms 27884 KB Output is correct
58 Correct 65 ms 27616 KB Output is correct
59 Correct 117 ms 52204 KB Output is correct
60 Correct 317 ms 81688 KB Output is correct
61 Correct 267 ms 36608 KB Output is correct
62 Correct 223 ms 34796 KB Output is correct
63 Correct 272 ms 34944 KB Output is correct
64 Correct 530 ms 43372 KB Output is correct
65 Correct 505 ms 47852 KB Output is correct
66 Correct 349 ms 77292 KB Output is correct
67 Correct 195 ms 35164 KB Output is correct
68 Correct 397 ms 45804 KB Output is correct
69 Correct 434 ms 50412 KB Output is correct
70 Correct 431 ms 44920 KB Output is correct