oj.uz

답안 #767180

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
767180 2023-06-26T13:27:19 Z qwerasdfzxcl Wild Boar (JOI18_wild_boar) C++17
47 / 100
 3112 ms 39784 KB 
#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
constexpr ll INF = 4e18;

vector<pair<int, int>> adj0[6060];
pair<int, int> Edge[2020];
ll dist0[4040][4040], res0[4040];
int visited0[6060], F[2020];

vector<int> S[100100], E[100100], in[2020], out[2020];
vector<ll> W[100100];
int X[100100];
ll dp[100100][4];

void dijkstra(int m, int s, ll (*dist)[4040], ll *res, vector<pair<int, int>> *adj){
	int *visited = visited0 + 2020;
	fill(res-2020, res+2020, INF);
	fill(visited-2020, visited+4040, -1);

	priority_queue<array<ll, 3>, vector<array<ll, 3>>, greater<array<ll, 3>>> pq;
	vector<array<ll, 3>> st;

	res[s] = F[abs(s)];
	pq.push({F[abs(s)], s, 0});

	// printf("dijkstra from %d:\n", s);
	while(!pq.empty() || !st.empty()){
		array<ll, 3> tmp;
		if (!st.empty()) {tmp = st.back(); st.pop_back();}
		else {tmp = pq.top(); pq.pop();}

		auto [dist, cur, p] = tmp;
		
		if (visited[cur]==-2) continue;
		if (visited[cur]==-1){
			if (cur <= m){
				// printf(" dist[%lld] = %lld\n", cur, res[cur]);
				visited[cur] = -2;
				for (auto &[v, w]:adj[cur]) if (visited[v]!=-2){
					st.push_back({dist, v, cur});
				}
			}

			else{
				visited[cur] = abs(p);
				for (auto &[v, w]:adj[cur]) if (visited[v]!=-2 && abs(v)!=abs(p)){
					res[v] = dist + w;
					pq.push({res[v], v, cur});
				}
			}
		}

		else{
			for (auto &[v, w]:adj[cur]) if (abs(v)==visited[cur] && visited[v]!=-2){
				res[v] = dist + w;
				pq.push({res[v], v, cur});
			}

			visited[cur] = -2;
		}
	}


}

void initW(int p, ll (*dist)[4040]){
	W[p].push_back(INF);
	S[p].push_back(-1);
	E[p].push_back(-1);

	for (auto &s1:out[X[p]]){
		for (auto &e1:in[X[p+1]]){
			if (W[p].back() > dist[s1][e1]){
				W[p].back() = dist[s1][e1];
				S[p].back() = s1;
				E[p].back() = e1;
			}
		}
	}

	W[p].push_back(INF);
	S[p].push_back(-1);
	E[p].push_back(-1);

	for (auto &s2:out[X[p]]) if (s2!=S[p][0]){
		for (auto &e2:in[X[p+1]]) if (e2!=E[p][0]){
			if (W[p].back() > dist[s2][e2]){
				W[p].back() = dist[s2][e2];
				S[p].back() = s2;
				E[p].back() = e2;
			}
		}
	}

	W[p].push_back(INF);
	S[p].push_back(-1);
	E[p].push_back(-1);

	for (auto &s3:out[X[p]]) if (s3!=S[p][0]){
		for (auto &e3:in[X[p+1]]) if (e3!=E[p][1]){
			if (W[p].back() > dist[s3][e3]){
				W[p].back() = dist[s3][e3];
				S[p].back() = s3;
				E[p].back() = e3;
			}
		}
	}

	W[p].push_back(INF);
	S[p].push_back(-1);
	E[p].push_back(-1);

	for (auto &s4:out[X[p]]) if (s4!=S[p][1]){
		for (auto &e4:in[X[p+1]]) if (e4!=E[p][0]){
			if (W[p].back() > dist[s4][e4]){
				W[p].back() = dist[s4][e4];
				S[p].back() = s4;
				E[p].back() = e4;
			}
		}
	}

	// printf("init %d to %d -> ", X[p], X[p+1]);
	// for (int i=0;i<4;i++){
	// 	printf("(%lld / %d, %d) ", W[p][i], S[p][i], E[p][i]);
	// }
	// printf("\n");
}

int main(){
	int n, m, q, l;
	scanf("%d %d %d %d", &n, &m, &q, &l);

	vector<pair<int, int>> *adj = adj0 + m;
	for (int i=1;i<=m;i++){
		int x, y, z;
		scanf("%d %d %d", &x, &y, &z);
		Edge[i] = {x, y}; F[i] = z;

		adj[i].emplace_back(y+m, 0);
		adj[-i].emplace_back(x+m, 0);

		adj[x+m].emplace_back(i, z);
		adj[y+m].emplace_back(-i, z);

		out[x].push_back(i);
		out[y].push_back(-i);

		in[x].push_back(-i);
		in[y].push_back(i);
	}

	ll (*dist)[4040] = (ll (*)[4040])(&(dist0[2020][2020]));
	ll *res = res0 + 2020;

	// printf(" What %d %d\n", &(dist[1][-1]), &(dist0[2021][2019]));

	for (int i=1;i<=m;i++){
		dijkstra(m, i, dist, res, adj);
		// if (i==1) printf(" WTF %lld\n", res[-2]);
		for (int j=-m;j<=m;j++) dist[i][j] = res[j];
		
		dijkstra(m, -i, dist, res, adj);
		for (int j=-m;j<=m;j++) dist[-i][j] = res[j];

		if (i>500) return 0;
	}
	// printf("WTFF %lld (%d / %d)\n", dist[1][-2], &(dist[1][-2]), &(dist0[2021][2018]));

	for (int i=1;i<=l;i++) scanf("%d", X+i);
	int pp, qq;
	scanf("%d %d", &pp, &qq);
	X[pp] = qq;

	for (int i=1;i<l;i++){
		initW(i, dist);

		for (int j=0;j<4;j++){
			dp[i+1][j] = INF;
			if (i==1) {dp[i+1][j] = W[1][j]; continue;}
			if (W[i][j]==INF) continue;

			for (int k=0;k<4;k++) if (abs(E[i-1][k])!=abs(S[i][j])){
				dp[i+1][j] = min(dp[i+1][j], dp[i][k] + W[i][j]);
			}
		}
	}

	ll rans = *min_element(dp[l], dp[l]+4);
	if (rans==INF) rans = -1;
	printf("%lld\n", rans);
}

Compilation message

wild_boar.cpp: In function 'int main()':
wild_boar.cpp:134:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  134 |  scanf("%d %d %d %d", &n, &m, &q, &l);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
wild_boar.cpp:139:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  139 |   scanf("%d %d %d", &x, &y, &z);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
wild_boar.cpp:172:30: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  172 |  for (int i=1;i<=l;i++) scanf("%d", X+i);
      |                         ~~~~~^~~~~~~~~~~
wild_boar.cpp:174:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  174 |  scanf("%d %d", &pp, &qq);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 7636 KB Output is correct
2 Correct 4 ms 7728 KB Output is correct
3 Correct 4 ms 7764 KB Output is correct
4 Correct 3 ms 7764 KB Output is correct
5 Correct 5 ms 7636 KB Output is correct
6 Correct 3 ms 7764 KB Output is correct
7 Correct 4 ms 7636 KB Output is correct
8 Correct 3 ms 7764 KB Output is correct
9 Correct 4 ms 7764 KB Output is correct
10 Correct 4 ms 7764 KB Output is correct
11 Correct 4 ms 7636 KB Output is correct
12 Correct 4 ms 7636 KB Output is correct
13 Correct 3 ms 7636 KB Output is correct
14 Correct 4 ms 7764 KB Output is correct
15 Correct 3 ms 7708 KB Output is correct
16 Correct 3 ms 7764 KB Output is correct
17 Correct 4 ms 7636 KB Output is correct
18 Correct 3 ms 7764 KB Output is correct
19 Correct 4 ms 7636 KB Output is correct
20 Correct 4 ms 7764 KB Output is correct
21 Correct 4 ms 7764 KB Output is correct
22 Correct 4 ms 7636 KB Output is correct
23 Correct 4 ms 7764 KB Output is correct
24 Correct 3 ms 7636 KB Output is correct
25 Correct 3 ms 7764 KB Output is correct

Subtask #2
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 7636 KB Output is correct
2 Correct 4 ms 7728 KB Output is correct
3 Correct 4 ms 7764 KB Output is correct
4 Correct 3 ms 7764 KB Output is correct
5 Correct 5 ms 7636 KB Output is correct
6 Correct 3 ms 7764 KB Output is correct
7 Correct 4 ms 7636 KB Output is correct
8 Correct 3 ms 7764 KB Output is correct
9 Correct 4 ms 7764 KB Output is correct
10 Correct 4 ms 7764 KB Output is correct
11 Correct 4 ms 7636 KB Output is correct
12 Correct 4 ms 7636 KB Output is correct
13 Correct 3 ms 7636 KB Output is correct
14 Correct 4 ms 7764 KB Output is correct
15 Correct 3 ms 7708 KB Output is correct
16 Correct 3 ms 7764 KB Output is correct
17 Correct 4 ms 7636 KB Output is correct
18 Correct 3 ms 7764 KB Output is correct
19 Correct 4 ms 7636 KB Output is correct
20 Correct 4 ms 7764 KB Output is correct
21 Correct 4 ms 7764 KB Output is correct
22 Correct 4 ms 7636 KB Output is correct
23 Correct 4 ms 7764 KB Output is correct
24 Correct 3 ms 7636 KB Output is correct
25 Correct 3 ms 7764 KB Output is correct
26 Correct 4 ms 8020 KB Output is correct
27 Correct 54 ms 23268 KB Output is correct
28 Correct 57 ms 23248 KB Output is correct
29 Correct 164 ms 27340 KB Output is correct
30 Correct 413 ms 27392 KB Output is correct
31 Correct 2401 ms 27352 KB Output is correct
32 Correct 2466 ms 27404 KB Output is correct
33 Correct 150 ms 27396 KB Output is correct
34 Correct 129 ms 27348 KB Output is correct
35 Correct 3112 ms 27424 KB Output is correct
36 Correct 1393 ms 27328 KB Output is correct
37 Correct 142 ms 27384 KB Output is correct
38 Correct 114 ms 27336 KB Output is correct
39 Correct 636 ms 27376 KB Output is correct
40 Correct 113 ms 27340 KB Output is correct
41 Correct 115 ms 27420 KB Output is correct
42 Correct 689 ms 27536 KB Output is correct
43 Correct 101 ms 27336 KB Output is correct
44 Correct 102 ms 27372 KB Output is correct
45 Correct 67 ms 27340 KB Output is correct

Subtask #3
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 7636 KB Output is correct
2 Correct 4 ms 7728 KB Output is correct
3 Correct 4 ms 7764 KB Output is correct
4 Correct 3 ms 7764 KB Output is correct
5 Correct 5 ms 7636 KB Output is correct
6 Correct 3 ms 7764 KB Output is correct
7 Correct 4 ms 7636 KB Output is correct
8 Correct 3 ms 7764 KB Output is correct
9 Correct 4 ms 7764 KB Output is correct
10 Correct 4 ms 7764 KB Output is correct
11 Correct 4 ms 7636 KB Output is correct
12 Correct 4 ms 7636 KB Output is correct
13 Correct 3 ms 7636 KB Output is correct
14 Correct 4 ms 7764 KB Output is correct
15 Correct 3 ms 7708 KB Output is correct
16 Correct 3 ms 7764 KB Output is correct
17 Correct 4 ms 7636 KB Output is correct
18 Correct 3 ms 7764 KB Output is correct
19 Correct 4 ms 7636 KB Output is correct
20 Correct 4 ms 7764 KB Output is correct
21 Correct 4 ms 7764 KB Output is correct
22 Correct 4 ms 7636 KB Output is correct
23 Correct 4 ms 7764 KB Output is correct
24 Correct 3 ms 7636 KB Output is correct
25 Correct 3 ms 7764 KB Output is correct
26 Correct 4 ms 8020 KB Output is correct
27 Correct 54 ms 23268 KB Output is correct
28 Correct 57 ms 23248 KB Output is correct
29 Correct 164 ms 27340 KB Output is correct
30 Correct 413 ms 27392 KB Output is correct
31 Correct 2401 ms 27352 KB Output is correct
32 Correct 2466 ms 27404 KB Output is correct
33 Correct 150 ms 27396 KB Output is correct
34 Correct 129 ms 27348 KB Output is correct
35 Correct 3112 ms 27424 KB Output is correct
36 Correct 1393 ms 27328 KB Output is correct
37 Correct 142 ms 27384 KB Output is correct
38 Correct 114 ms 27336 KB Output is correct
39 Correct 636 ms 27376 KB Output is correct
40 Correct 113 ms 27340 KB Output is correct
41 Correct 115 ms 27420 KB Output is correct
42 Correct 689 ms 27536 KB Output is correct
43 Correct 101 ms 27336 KB Output is correct
44 Correct 102 ms 27372 KB Output is correct
45 Correct 67 ms 27340 KB Output is correct
46 Correct 141 ms 19584 KB Output is correct
47 Incorrect 564 ms 39784 KB Output isn't correct
48 Halted 0 ms 0 KB -

Subtask #4
0 / 38.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 7636 KB Output is correct
2 Correct 4 ms 7728 KB Output is correct
3 Correct 4 ms 7764 KB Output is correct
4 Correct 3 ms 7764 KB Output is correct
5 Correct 5 ms 7636 KB Output is correct
6 Correct 3 ms 7764 KB Output is correct
7 Correct 4 ms 7636 KB Output is correct
8 Correct 3 ms 7764 KB Output is correct
9 Correct 4 ms 7764 KB Output is correct
10 Correct 4 ms 7764 KB Output is correct
11 Correct 4 ms 7636 KB Output is correct
12 Correct 4 ms 7636 KB Output is correct
13 Correct 3 ms 7636 KB Output is correct
14 Correct 4 ms 7764 KB Output is correct
15 Correct 3 ms 7708 KB Output is correct
16 Correct 3 ms 7764 KB Output is correct
17 Correct 4 ms 7636 KB Output is correct
18 Correct 3 ms 7764 KB Output is correct
19 Correct 4 ms 7636 KB Output is correct
20 Correct 4 ms 7764 KB Output is correct
21 Correct 4 ms 7764 KB Output is correct
22 Correct 4 ms 7636 KB Output is correct
23 Correct 4 ms 7764 KB Output is correct
24 Correct 3 ms 7636 KB Output is correct
25 Correct 3 ms 7764 KB Output is correct
26 Correct 4 ms 8020 KB Output is correct
27 Correct 54 ms 23268 KB Output is correct
28 Correct 57 ms 23248 KB Output is correct
29 Correct 164 ms 27340 KB Output is correct
30 Correct 413 ms 27392 KB Output is correct
31 Correct 2401 ms 27352 KB Output is correct
32 Correct 2466 ms 27404 KB Output is correct
33 Correct 150 ms 27396 KB Output is correct
34 Correct 129 ms 27348 KB Output is correct
35 Correct 3112 ms 27424 KB Output is correct
36 Correct 1393 ms 27328 KB Output is correct
37 Correct 142 ms 27384 KB Output is correct
38 Correct 114 ms 27336 KB Output is correct
39 Correct 636 ms 27376 KB Output is correct
40 Correct 113 ms 27340 KB Output is correct
41 Correct 115 ms 27420 KB Output is correct
42 Correct 689 ms 27536 KB Output is correct
43 Correct 101 ms 27336 KB Output is correct
44 Correct 102 ms 27372 KB Output is correct
45 Correct 67 ms 27340 KB Output is correct
46 Correct 141 ms 19584 KB Output is correct
47 Incorrect 564 ms 39784 KB Output isn't correct
48 Halted 0 ms 0 KB -