oj.uz

답안 #136737

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
136737 2019-07-26T07:56:22 Z E869120 Wild Boar (JOI18_wild_boar) C++14
47 / 100
 18000 ms 63140 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 = 3;
const int MAX_V = 6;
const long long INF = (((1LL << 41) - 1LL) << 22LL);

int N, M, L, T, A[MAX_N], B[MAX_N], C[MAX_N], P[100009], cntv[MAX_N], forced[MAX_N];
vector<pair<int, long long>> G[MAX_N];
long long dist[MAX_N][MAX_N][MAX_V];
pair<long long, int> dp[100009][2];

int cnt1[MAX_N][MAX_N], cnt2[MAX_N], cnt3[MAX_N];
long long R[19]; int sz;

void hosei() {
	int dt = 0, kinds = 0;
	for (int i = 0; i < sz; i++) {
		int v1 = ((R[i] >> 11) & 2047LL), v2 = (R[i] & 2047LL);
		if (cnt1[v1][v2] >= 1) continue;
		if (cnt2[v1] >= MAX_PREV) continue;
		if (cnt3[v2] >= MAX_CANDIDATE) continue;
		R[dt] = R[i]; dt++;
		cnt1[v1][v2]++; cnt2[v1]++; cnt3[v2]++;
	}
	for (int i = 0; i < dt; i++) {
		int v1 = ((R[i] >> 11) & 2047LL), v2 = (R[i] & 2047LL);
		cnt1[v1][v2] = 0; cnt2[v1] = 0; cnt3[v2] = 0;
	}
	sz = dt;
}

void init(int pos) {
	for (int i = 1; i <= N; i++) {
		cntv[i] = -1; forced[i] = -(1 << 30);
		for (int j = 0; j < MAX_V; j++) { dist[pos][i][j] = INF; }
	}

	priority_queue<long long, vector<long long>, greater<long long>>Q;
	dist[pos][pos][0] = 0LL;

	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] = (cost << 22) + 1LL * (to << 11) + 1LL * pos;
		Q.push(1LL * (cost << 11) + 1LL * to);
	}

	// 各 dist に対する上位 6 点を記録する

	while (!Q.empty()) {
		int cur = (Q.top() & 2047); Q.pop();
		if (forced[cur] == cntv[cur]) continue;
		cntv[cur] = forced[cur];

		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_V; j++) {
				if (dist[pos][to][j] != INF) { R[sz] = dist[pos][to][j]; sz++; }
			}

			for (int j = 0; j < MAX_V; j++) {
				if ((dist[pos][cur][j] & 2047LL) == to) continue;
				if (dist[pos][cur][j] == INF) break;
				long long val = (dist[pos][cur][j] >> 22) + cost;
				long long v1 = ((dist[pos][cur][j] >> 11) & 2047LL);
				long long v2 = cur; if (v1 == 0) v1 = to;
				R[sz] = (val << 22) + (v1 << 11) + v2; sz++;
			}
			sort(R, R + sz); hosei();

			long long flag = (1LL << 60);
			for (int j = 0; j < min(sz, MAX_V); j++) {
				if (dist[pos][to][j] > R[j]) {
					flag = min(flag, (R[j] >> 22));
					flag = true;
					dist[pos][to][j] = R[j];
				}
			}
			if (flag < (1LL << 41)) {
				Q.push(1LL * (flag << 11) + 1LL * to);
				cntv[to] = flag;
			}
		}
	}
}

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_V; k++) {
				if (dist[from][to][k] == INF) continue;
				long long v0 = ((dist[from][to][k] >> 22));
				long long v1 = ((dist[from][to][k] >> 11) & 2047LL);
				long long v2 = ((dist[from][to][k]) & 2047LL);
				if (t >= 3 && dp[t - 1][j].second == v1) continue;
				vec.push_back(make_pair(dp[t - 1][j].first + v0, v2));
			}
		}
		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:26:14: warning: unused variable 'kinds' [-Wunused-variable]
  int dt = 0, kinds = 0;
              ^~~~~
wild_boar.cpp: In function 'void init(int)':
wild_boar.cpp:51:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < G[pos].size(); i++) {
                  ~~^~~~~~~~~~~~~~~
wild_boar.cpp:64:21: 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:123:21: 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:136:7: 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:138:8: 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:142:36: 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:147:20: 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 580 KB Output is correct
2 Correct 2 ms 504 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 504 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 504 KB Output is correct
8 Correct 2 ms 504 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 504 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 504 KB Output is correct
23 Correct 2 ms 504 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 504 KB Output is correct

Subtask #2
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 580 KB Output is correct
2 Correct 2 ms 504 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 504 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 504 KB Output is correct
8 Correct 2 ms 504 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 504 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 504 KB Output is correct
23 Correct 2 ms 504 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 504 KB Output is correct
26 Correct 5 ms 632 KB Output is correct
27 Correct 19 ms 5240 KB Output is correct
28 Correct 19 ms 5240 KB Output is correct
29 Correct 241 ms 5304 KB Output is correct
30 Correct 201 ms 5316 KB Output is correct
31 Correct 185 ms 5348 KB Output is correct
32 Correct 163 ms 5240 KB Output is correct
33 Correct 342 ms 6496 KB Output is correct
34 Correct 372 ms 6264 KB Output is correct
35 Correct 161 ms 6264 KB Output is correct
36 Correct 220 ms 6264 KB Output is correct
37 Correct 313 ms 6264 KB Output is correct
38 Correct 518 ms 7800 KB Output is correct
39 Correct 187 ms 7644 KB Output is correct
40 Correct 381 ms 7708 KB Output is correct
41 Correct 398 ms 7800 KB Output is correct
42 Correct 170 ms 8568 KB Output is correct
43 Correct 306 ms 9296 KB Output is correct
44 Correct 316 ms 9340 KB Output is correct
45 Correct 59 ms 11000 KB Output is correct

Subtask #3
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 580 KB Output is correct
2 Correct 2 ms 504 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 504 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 504 KB Output is correct
8 Correct 2 ms 504 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 504 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 504 KB Output is correct
23 Correct 2 ms 504 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 504 KB Output is correct
26 Correct 5 ms 632 KB Output is correct
27 Correct 19 ms 5240 KB Output is correct
28 Correct 19 ms 5240 KB Output is correct
29 Correct 241 ms 5304 KB Output is correct
30 Correct 201 ms 5316 KB Output is correct
31 Correct 185 ms 5348 KB Output is correct
32 Correct 163 ms 5240 KB Output is correct
33 Correct 342 ms 6496 KB Output is correct
34 Correct 372 ms 6264 KB Output is correct
35 Correct 161 ms 6264 KB Output is correct
36 Correct 220 ms 6264 KB Output is correct
37 Correct 313 ms 6264 KB Output is correct
38 Correct 518 ms 7800 KB Output is correct
39 Correct 187 ms 7644 KB Output is correct
40 Correct 381 ms 7708 KB Output is correct
41 Correct 398 ms 7800 KB Output is correct
42 Correct 170 ms 8568 KB Output is correct
43 Correct 306 ms 9296 KB Output is correct
44 Correct 316 ms 9340 KB Output is correct
45 Correct 59 ms 11000 KB Output is correct
46 Correct 697 ms 4204 KB Output is correct
47 Correct 5974 ms 20928 KB Output is correct
48 Correct 8796 ms 42876 KB Output is correct
49 Correct 8330 ms 63140 KB Output is correct
50 Correct 9825 ms 63108 KB Output is correct
51 Correct 8209 ms 62972 KB Output is correct
52 Execution timed out 18071 ms 48704 KB Time limit exceeded
53 Halted 0 ms 0 KB -

Subtask #4
0 / 38.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 580 KB Output is correct
2 Correct 2 ms 504 KB Output is correct
3 Correct 2 ms 504 KB Output is correct
4 Correct 2 ms 504 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 504 KB Output is correct
8 Correct 2 ms 504 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 504 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 504 KB Output is correct
23 Correct 2 ms 504 KB Output is correct
24 Correct 2 ms 376 KB Output is correct
25 Correct 2 ms 504 KB Output is correct
26 Correct 5 ms 632 KB Output is correct
27 Correct 19 ms 5240 KB Output is correct
28 Correct 19 ms 5240 KB Output is correct
29 Correct 241 ms 5304 KB Output is correct
30 Correct 201 ms 5316 KB Output is correct
31 Correct 185 ms 5348 KB Output is correct
32 Correct 163 ms 5240 KB Output is correct
33 Correct 342 ms 6496 KB Output is correct
34 Correct 372 ms 6264 KB Output is correct
35 Correct 161 ms 6264 KB Output is correct
36 Correct 220 ms 6264 KB Output is correct
37 Correct 313 ms 6264 KB Output is correct
38 Correct 518 ms 7800 KB Output is correct
39 Correct 187 ms 7644 KB Output is correct
40 Correct 381 ms 7708 KB Output is correct
41 Correct 398 ms 7800 KB Output is correct
42 Correct 170 ms 8568 KB Output is correct
43 Correct 306 ms 9296 KB Output is correct
44 Correct 316 ms 9340 KB Output is correct
45 Correct 59 ms 11000 KB Output is correct
46 Correct 697 ms 4204 KB Output is correct
47 Correct 5974 ms 20928 KB Output is correct
48 Correct 8796 ms 42876 KB Output is correct
49 Correct 8330 ms 63140 KB Output is correct
50 Correct 9825 ms 63108 KB Output is correct
51 Correct 8209 ms 62972 KB Output is correct
52 Execution timed out 18071 ms 48704 KB Time limit exceeded
53 Halted 0 ms 0 KB -