oj.uz

답안 #136688

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
136688 2019-07-26T07:04:00 Z E869120 Wild Boar (JOI18_wild_boar) C++14
47 / 100
 18000 ms 29432 KB 
#include <iostream>
#include <tuple>
#include <queue>
#include <vector>
#include <cassert>
#include <algorithm>
#include <functional>
using namespace std;
#pragma warning (disable: 4996)

const int MAX_N = 2009;
const int MAX_CANDIDATE = 4;
const int MAX_PREV = 4;

int N, M, L, T, A[MAX_N], B[MAX_N], C[MAX_N], P[100009];
vector<pair<int, long long>> G[MAX_N];
tuple<long long, int, int> dist[MAX_N][MAX_N][MAX_CANDIDATE * MAX_PREV];
pair<long long, int> dp[100009][2];

int cnt1[MAX_N][MAX_N], cnt2[MAX_N], cnt3[MAX_N];

vector<tuple<long long, int, int>> hosei(vector<tuple<long long, int, int>> &R) {
	vector<tuple<long long, int, int>> F;
	for (int i = 0; i < R.size(); i++) {
		int v1 = get<1>(R[i]), v2 = get<2>(R[i]);
		if (cnt1[v1][v2] >= 1) continue;
		if (cnt2[v1] >= MAX_PREV) continue;
		if (cnt3[v2] >= MAX_CANDIDATE) continue;
		F.push_back(R[i]);
		cnt1[v1][v2]++; cnt2[v1]++; cnt3[v2]++;
	}
	for (int i = 0; i < R.size(); i++) {
		int v1 = get<1>(R[i]), v2 = get<2>(R[i]);
		cnt1[v1][v2] = 0; cnt2[v1] = 0; cnt3[v2] = 0;
	}
	return F;
}

void init(int pos) {
	for (int i = 1; i <= N; i++) {
		for (int j = 0; j < MAX_CANDIDATE * MAX_PREV; j++) dist[pos][i][j] = make_tuple(1LL << 60, -1, -1);
	}

	priority_queue<pair<long long, int>, vector<pair<long long, int>>, greater<pair<long long, int>>>Q;
	dist[pos][pos][0] = make_tuple(0, -1, -1);

	for (int i = 0; i < G[pos].size(); i++) {
		int to = G[pos][i].first; long long cost = G[pos][i].second;
		dist[pos][to][0] = make_tuple(cost, to, pos);
		Q.push(make_pair(cost, to));
	}

	// 各 dist に対する上位 6 点を記録する

	while (!Q.empty()) {
		int cur = Q.top().second; Q.pop();
		for (int i = 0; i < G[cur].size(); i++) {
			int to = G[cur][i].first; long long cost = G[cur][i].second;

			vector<tuple<long long, int, int>> vec;
			for (int j = 0; j < MAX_CANDIDATE * MAX_PREV; j++) {
				if (get<0>(dist[pos][to][j]) != (1LL << 60)) vec.push_back(dist[pos][to][j]);
			}

			for (int j = 0; j < MAX_CANDIDATE * MAX_PREV; j++) {
				if (get<2>(dist[pos][cur][j]) == to) continue;
				long long val = get<0>(dist[pos][cur][j]) + cost;
				long long v1 = get<1>(dist[pos][cur][j]);
				long long v2 = cur; if (v1 == -1) v1 = to;
				if (val < (1LL << 60)) vec.push_back(make_tuple(val, v1, v2));
			}
			sort(vec.begin(), vec.end());

			vec = hosei(vec); long long flag = (1LL << 60);
			for (int j = 0; j < min((int)vec.size(), MAX_CANDIDATE * MAX_PREV); j++) {
				if (dist[pos][to][j] > vec[j]) {
					flag = min(flag, get<0>(vec[j]));
					flag = true;
					dist[pos][to][j] = vec[j];
				}
			}
			if (flag < (1LL << 60)) {
				Q.push(make_pair(flag, to));
			}
		}
	}
}

long long solve() {
	for (int i = 1; i <= L; i++) {
		dp[i][0] = make_pair(1LL << 60, -1);
		dp[i][1] = make_pair(1LL << 60, -1);
	}
	for (int i = 0; i < min(2, (int)G[P[1]].size()); i++) {
		dp[1][i] = make_pair(0LL, G[P[1]][i].first);
	}

	for (int t = 2; t <= L; t++) {
		vector<pair<long long, int>> vec;
		int from = P[t - 1], to = P[t];

		for (int j = 0; j < 2; j++) {
			if (dp[t - 1][j].first == (1LL << 60)) continue;
			for (int k = 0; k < MAX_CANDIDATE * MAX_PREV; k++) {
				if ((t >= 3 && dp[t - 1][j].second == get<1>(dist[from][to][k])) || get<0>(dist[from][to][k]) == (1LL << 60)) continue;
				vec.push_back(make_pair(dp[t - 1][j].first + get<0>(dist[from][to][k]), get<2>(dist[from][to][k])));
			}
		}
		sort(vec.begin(), vec.end());
		for (int j = 0; j < vec.size(); j++) {
			if (j == 0) dp[t][0] = vec[j];
			else if (vec[j].second != vec[j - 1].second) {
				dp[t][1] = vec[j]; break;
			}
		}
	}

	if (dp[L][0].first == (1LL << 60)) return -1LL;
	return dp[L][0].first;
}

int main() {
	scanf("%d%d%d%d", &N, &M, &T, &L);
	for (int i = 1; i <= M; i++) {
		scanf("%d%d%d", &A[i], &B[i], &C[i]);
		G[A[i]].push_back(make_pair(B[i], C[i]));
		G[B[i]].push_back(make_pair(A[i], C[i]));
	}
	for (int i = 1; i <= L; i++) scanf("%d", &P[i]);
	
	for (int i = 1; i <= N; i++) init(i);

	for (int i = 1; i <= T; i++) {
		int v1, v2; scanf("%d%d", &v1, &v2);
		P[v1] = v2;
		printf("%lld\n", solve());
	}
	return 0;
}

Compilation message

wild_boar.cpp:9:0: warning: ignoring #pragma warning  [-Wunknown-pragmas]
 #pragma warning (disable: 4996)
 
wild_boar.cpp: In function 'std::vector<std::tuple<long long int, int, int> > hosei(std::vector<std::tuple<long long int, int, int> >&)':
wild_boar.cpp:24:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < R.size(); i++) {
                  ~~^~~~~~~~~~
wild_boar.cpp:32:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < R.size(); i++) {
                  ~~^~~~~~~~~~
wild_boar.cpp: In function 'void init(int)':
wild_boar.cpp:47:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < G[pos].size(); i++) {
                  ~~^~~~~~~~~~~~~~~
wild_boar.cpp:57:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i = 0; i < G[cur].size(); i++) {
                   ~~^~~~~~~~~~~~~~~
wild_boar.cpp: In function 'long long int solve()':
wild_boar.cpp:110:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int j = 0; j < vec.size(); j++) {
                   ~~^~~~~~~~~~~~
wild_boar.cpp: In function 'int main()':
wild_boar.cpp:123:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d%d", &N, &M, &T, &L);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
wild_boar.cpp:125:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d", &A[i], &B[i], &C[i]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
wild_boar.cpp:129:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for (int i = 1; i <= L; i++) scanf("%d", &P[i]);
                               ~~~~~^~~~~~~~~~~~~
wild_boar.cpp:134:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   int v1, v2; scanf("%d%d", &v1, &v2);
               ~~~~~^~~~~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 4 ms 376 KB Output is correct
3 Correct 4 ms 504 KB Output is correct
4 Correct 3 ms 504 KB Output is correct
5 Correct 3 ms 504 KB Output is correct
6 Correct 4 ms 504 KB Output is correct
7 Correct 3 ms 504 KB Output is correct
8 Correct 3 ms 504 KB Output is correct
9 Correct 3 ms 504 KB Output is correct
10 Correct 3 ms 508 KB Output is correct
11 Correct 3 ms 504 KB Output is correct
12 Correct 3 ms 504 KB Output is correct
13 Correct 3 ms 504 KB Output is correct
14 Correct 3 ms 504 KB Output is correct
15 Correct 3 ms 548 KB Output is correct
16 Correct 3 ms 504 KB Output is correct
17 Correct 2 ms 504 KB Output is correct
18 Correct 3 ms 504 KB Output is correct
19 Correct 2 ms 504 KB Output is correct
20 Correct 2 ms 504 KB Output is correct
21 Correct 4 ms 504 KB Output is correct
22 Correct 4 ms 504 KB Output is correct
23 Correct 4 ms 504 KB Output is correct
24 Correct 4 ms 504 KB Output is correct
25 Correct 4 ms 508 KB Output is correct

Subtask #2
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 4 ms 376 KB Output is correct
3 Correct 4 ms 504 KB Output is correct
4 Correct 3 ms 504 KB Output is correct
5 Correct 3 ms 504 KB Output is correct
6 Correct 4 ms 504 KB Output is correct
7 Correct 3 ms 504 KB Output is correct
8 Correct 3 ms 504 KB Output is correct
9 Correct 3 ms 504 KB Output is correct
10 Correct 3 ms 508 KB Output is correct
11 Correct 3 ms 504 KB Output is correct
12 Correct 3 ms 504 KB Output is correct
13 Correct 3 ms 504 KB Output is correct
14 Correct 3 ms 504 KB Output is correct
15 Correct 3 ms 548 KB Output is correct
16 Correct 3 ms 504 KB Output is correct
17 Correct 2 ms 504 KB Output is correct
18 Correct 3 ms 504 KB Output is correct
19 Correct 2 ms 504 KB Output is correct
20 Correct 2 ms 504 KB Output is correct
21 Correct 4 ms 504 KB Output is correct
22 Correct 4 ms 504 KB Output is correct
23 Correct 4 ms 504 KB Output is correct
24 Correct 4 ms 504 KB Output is correct
25 Correct 4 ms 508 KB Output is correct
26 Correct 41 ms 760 KB Output is correct
27 Correct 27 ms 7288 KB Output is correct
28 Correct 25 ms 7288 KB Output is correct
29 Correct 4466 ms 7528 KB Output is correct
30 Correct 3347 ms 7480 KB Output is correct
31 Correct 3192 ms 7644 KB Output is correct
32 Correct 2856 ms 7596 KB Output is correct
33 Correct 4804 ms 11216 KB Output is correct
34 Correct 4930 ms 11092 KB Output is correct
35 Correct 1518 ms 11128 KB Output is correct
36 Correct 2348 ms 11256 KB Output is correct
37 Correct 4178 ms 11084 KB Output is correct
38 Correct 4026 ms 15996 KB Output is correct
39 Correct 1330 ms 16044 KB Output is correct
40 Correct 3223 ms 15992 KB Output is correct
41 Correct 3396 ms 15988 KB Output is correct
42 Correct 812 ms 19480 KB Output is correct
43 Correct 1549 ms 22116 KB Output is correct
44 Correct 1531 ms 21996 KB Output is correct
45 Correct 159 ms 29432 KB Output is correct

Subtask #3
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 4 ms 376 KB Output is correct
3 Correct 4 ms 504 KB Output is correct
4 Correct 3 ms 504 KB Output is correct
5 Correct 3 ms 504 KB Output is correct
6 Correct 4 ms 504 KB Output is correct
7 Correct 3 ms 504 KB Output is correct
8 Correct 3 ms 504 KB Output is correct
9 Correct 3 ms 504 KB Output is correct
10 Correct 3 ms 508 KB Output is correct
11 Correct 3 ms 504 KB Output is correct
12 Correct 3 ms 504 KB Output is correct
13 Correct 3 ms 504 KB Output is correct
14 Correct 3 ms 504 KB Output is correct
15 Correct 3 ms 548 KB Output is correct
16 Correct 3 ms 504 KB Output is correct
17 Correct 2 ms 504 KB Output is correct
18 Correct 3 ms 504 KB Output is correct
19 Correct 2 ms 504 KB Output is correct
20 Correct 2 ms 504 KB Output is correct
21 Correct 4 ms 504 KB Output is correct
22 Correct 4 ms 504 KB Output is correct
23 Correct 4 ms 504 KB Output is correct
24 Correct 4 ms 504 KB Output is correct
25 Correct 4 ms 508 KB Output is correct
26 Correct 41 ms 760 KB Output is correct
27 Correct 27 ms 7288 KB Output is correct
28 Correct 25 ms 7288 KB Output is correct
29 Correct 4466 ms 7528 KB Output is correct
30 Correct 3347 ms 7480 KB Output is correct
31 Correct 3192 ms 7644 KB Output is correct
32 Correct 2856 ms 7596 KB Output is correct
33 Correct 4804 ms 11216 KB Output is correct
34 Correct 4930 ms 11092 KB Output is correct
35 Correct 1518 ms 11128 KB Output is correct
36 Correct 2348 ms 11256 KB Output is correct
37 Correct 4178 ms 11084 KB Output is correct
38 Correct 4026 ms 15996 KB Output is correct
39 Correct 1330 ms 16044 KB Output is correct
40 Correct 3223 ms 15992 KB Output is correct
41 Correct 3396 ms 15988 KB Output is correct
42 Correct 812 ms 19480 KB Output is correct
43 Correct 1549 ms 22116 KB Output is correct
44 Correct 1531 ms 21996 KB Output is correct
45 Correct 159 ms 29432 KB Output is correct
46 Correct 14473 ms 12424 KB Output is correct
47 Execution timed out 18033 ms 11456 KB Time limit exceeded
48 Halted 0 ms 0 KB -

Subtask #4
0 / 38.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 4 ms 376 KB Output is correct
3 Correct 4 ms 504 KB Output is correct
4 Correct 3 ms 504 KB Output is correct
5 Correct 3 ms 504 KB Output is correct
6 Correct 4 ms 504 KB Output is correct
7 Correct 3 ms 504 KB Output is correct
8 Correct 3 ms 504 KB Output is correct
9 Correct 3 ms 504 KB Output is correct
10 Correct 3 ms 508 KB Output is correct
11 Correct 3 ms 504 KB Output is correct
12 Correct 3 ms 504 KB Output is correct
13 Correct 3 ms 504 KB Output is correct
14 Correct 3 ms 504 KB Output is correct
15 Correct 3 ms 548 KB Output is correct
16 Correct 3 ms 504 KB Output is correct
17 Correct 2 ms 504 KB Output is correct
18 Correct 3 ms 504 KB Output is correct
19 Correct 2 ms 504 KB Output is correct
20 Correct 2 ms 504 KB Output is correct
21 Correct 4 ms 504 KB Output is correct
22 Correct 4 ms 504 KB Output is correct
23 Correct 4 ms 504 KB Output is correct
24 Correct 4 ms 504 KB Output is correct
25 Correct 4 ms 508 KB Output is correct
26 Correct 41 ms 760 KB Output is correct
27 Correct 27 ms 7288 KB Output is correct
28 Correct 25 ms 7288 KB Output is correct
29 Correct 4466 ms 7528 KB Output is correct
30 Correct 3347 ms 7480 KB Output is correct
31 Correct 3192 ms 7644 KB Output is correct
32 Correct 2856 ms 7596 KB Output is correct
33 Correct 4804 ms 11216 KB Output is correct
34 Correct 4930 ms 11092 KB Output is correct
35 Correct 1518 ms 11128 KB Output is correct
36 Correct 2348 ms 11256 KB Output is correct
37 Correct 4178 ms 11084 KB Output is correct
38 Correct 4026 ms 15996 KB Output is correct
39 Correct 1330 ms 16044 KB Output is correct
40 Correct 3223 ms 15992 KB Output is correct
41 Correct 3396 ms 15988 KB Output is correct
42 Correct 812 ms 19480 KB Output is correct
43 Correct 1549 ms 22116 KB Output is correct
44 Correct 1531 ms 21996 KB Output is correct
45 Correct 159 ms 29432 KB Output is correct
46 Correct 14473 ms 12424 KB Output is correct
47 Execution timed out 18033 ms 11456 KB Time limit exceeded
48 Halted 0 ms 0 KB -