oj.uz

Submission #136707

# Submission time Handle Problem Language Result Execution time Memory
136707 2019-07-26T07:24:03 Z E869120 Wild Boar (JOI18_wild_boar) C++14
12 / 100
 511 ms 6012 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 = 2;
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];
tuple<long long, int, int> R[19]; int sz;

void hosei() {
	int dt = 0, kinds = 0;
	for (int i = 0; i < sz; i++) {
		int v1 = get<1>(R[i]), v2 = get<2>(R[i]);
		if (cnt1[v1][v2] >= 1) continue;
		if (cnt2[v1] >= 2) continue;
		if (cnt3[v2] >= 2) continue;
		R[dt] = R[i]; dt++;
		cnt1[v1][v2]++; cnt2[v1]++; cnt3[v2]++;
	}
	for (int i = 0; i < dt; i++) {
		int v1 = get<1>(R[i]), v2 = get<2>(R[i]);
		cnt1[v1][v2] = 0; cnt2[v1] = 0; cnt3[v2] = 0;
	}
	sz = dt;
}

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;

			sz = 0;
			for (int j = 0; j < MAX_CANDIDATE * MAX_PREV; j++) {
				if (get<0>(dist[pos][to][j]) != (1LL << 60)) { R[sz] = dist[pos][to][j]; sz++; }
			}

			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)) { R[sz] = make_tuple(val, v1, v2); sz++; }
			}
			sort(R, R + sz); hosei();

			long long flag = (1LL << 60);
			for (int j = 0; j < min(sz, MAX_CANDIDATE * MAX_PREV); j++) {
				if (dist[pos][to][j] > R[j]) {
					flag = min(flag, get<0>(R[j]));
					flag = true;
					dist[pos][to][j] = R[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 'void hosei()':
wild_boar.cpp:24:14: warning: unused variable 'kinds' [-Wunused-variable]
  int dt = 0, kinds = 0;
              ^~~~~
wild_boar.cpp: In function 'void init(int)':
wild_boar.cpp:48:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < G[pos].size(); i++) {
                  ~~^~~~~~~~~~~~~~~
wild_boar.cpp:58:21: 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:111:21: 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:124:7: 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:126:8: 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:130:36: 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:135:20: 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

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 508 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 508 KB Output is correct
9 Correct 2 ms 504 KB Output is correct
10 Correct 2 ms 504 KB Output is correct
11 Correct 2 ms 508 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 2 ms 504 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 2 ms 504 KB Output is correct
16 Correct 2 ms 504 KB Output is correct
17 Correct 2 ms 504 KB Output is correct
18 Correct 2 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 2 ms 376 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 504 KB Output is correct
24 Correct 2 ms 504 KB Output is correct
25 Correct 2 ms 376 KB Output is correct

Subtask #2
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 508 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 508 KB Output is correct
9 Correct 2 ms 504 KB Output is correct
10 Correct 2 ms 504 KB Output is correct
11 Correct 2 ms 508 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 2 ms 504 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 2 ms 504 KB Output is correct
16 Correct 2 ms 504 KB Output is correct
17 Correct 2 ms 504 KB Output is correct
18 Correct 2 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 2 ms 376 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 504 KB Output is correct
24 Correct 2 ms 504 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 7 ms 632 KB Output is correct
27 Correct 21 ms 6012 KB Output is correct
28 Correct 20 ms 6008 KB Output is correct
29 Incorrect 511 ms 6008 KB Output isn't correct
30 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 508 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 508 KB Output is correct
9 Correct 2 ms 504 KB Output is correct
10 Correct 2 ms 504 KB Output is correct
11 Correct 2 ms 508 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 2 ms 504 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 2 ms 504 KB Output is correct
16 Correct 2 ms 504 KB Output is correct
17 Correct 2 ms 504 KB Output is correct
18 Correct 2 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 2 ms 376 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 504 KB Output is correct
24 Correct 2 ms 504 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 7 ms 632 KB Output is correct
27 Correct 21 ms 6012 KB Output is correct
28 Correct 20 ms 6008 KB Output is correct
29 Incorrect 511 ms 6008 KB Output isn't correct
30 Halted 0 ms 0 KB -

Subtask #4
0 / 38.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 508 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 508 KB Output is correct
9 Correct 2 ms 504 KB Output is correct
10 Correct 2 ms 504 KB Output is correct
11 Correct 2 ms 508 KB Output is correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 2 ms 504 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 2 ms 504 KB Output is correct
16 Correct 2 ms 504 KB Output is correct
17 Correct 2 ms 504 KB Output is correct
18 Correct 2 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 2 ms 376 KB Output is correct
22 Correct 2 ms 376 KB Output is correct
23 Correct 2 ms 504 KB Output is correct
24 Correct 2 ms 504 KB Output is correct
25 Correct 2 ms 376 KB Output is correct
26 Correct 7 ms 632 KB Output is correct
27 Correct 21 ms 6012 KB Output is correct
28 Correct 20 ms 6008 KB Output is correct
29 Incorrect 511 ms 6008 KB Output isn't correct
30 Halted 0 ms 0 KB -