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Submission #754388

# Submission time Handle Problem Language Result Execution time Memory
754388 2023-06-07T16:09:10 Z Markomafko972 Toll (BOI17_toll) C++14
100 / 100
 961 ms 127172 KB 
#include <bits/stdc++.h>
#define X first
#define Y second
#define pb push_back
#define pii pair<int, int>
typedef long long ll;
using namespace std;

const int MOD = 1e9 + 7;
const ll INF = 1e18;
const int OFF = (1 << 20);

int k, n, ed, q, a, b, c;
vector<pii> v[50005];
vector<pii> rev[50005];
vector<int> br[50005];
map<int, int> m[50005];
map<int, int> bio[50005];

void rek(int l, int r) {
	if (l >= r) return;
	
	
	int mid = (l+r)/2;
	for (int i = mid-1; i >= l; i--) {
		for (int j = 0; j < br[mid].size(); j++) {
			int poc = br[mid][j];
			for (int w = 0; w < br[i+1].size(); w++) {
				int cvor = br[i+1][w];
				if (m[cvor][poc] == 0 && cvor != poc) continue;
				
				for (int slj = 0; slj < rev[cvor].size(); slj++) {
					int sus = rev[cvor][slj].X;
					int dist = m[cvor][poc]+rev[cvor][slj].Y;
					if (m[sus][poc] == 0 || m[sus][poc] > dist) m[sus][poc] = dist;
				}
			}
		}
	}
	for (int i = mid+2; i <= r; i++) {
		for (int j = 0; j < br[mid+1].size(); j++) {
			int poc = br[mid+1][j];
			for (int w = 0; w < br[i-1].size(); w++) {
				int cvor = br[i-1][w];
				if (m[poc][cvor] == 0 && cvor != poc) continue;
			
				for (int slj = 0; slj < v[cvor].size(); slj++) {
					int sus = v[cvor][slj].X;
					int dist = m[poc][cvor]+v[cvor][slj].Y;
					if (m[poc][sus] == 0 || m[poc][sus] > dist) m[poc][sus] = dist;
				}
			}
		}
	}
	
	rek(l, mid);
	rek(mid+1, r);
}

int trazimid(int l, int r, int lo, int hi) {
	if (hi < l || r < lo) return -1;
	int mid = (lo+hi)/2;
	if (l <= mid && mid <= r) return mid;
		
	return max(trazimid(l, r, lo, mid), trazimid(l, r, mid+1, hi));
}

int main () {

	ios_base::sync_with_stdio(false);
	cin.tie(0);
	
	cin >> k >> n >> ed >> q;
	for (int i = 0; i < ed; i++) {
		cin >> a >> b >> c;
		v[a].push_back({b, c});
		rev[b].push_back({a, c});
	}
	for (int i = 0; i < n; i++) br[i/k].push_back(i);
	
	rek(0, (n-1)/k);
	
	for (int i = 0; i < q; i++) {
		cin >> a >> b;
		int sred = trazimid(a/k, b/k, 0, (n-1)/k);
		
		if (sred == b/k) {
			if (m[a][b] == 0) cout << "-1\n";
			else cout << m[a][b] << "\n";
		}
		else {
			int mini = 1e9;
			for (int j = 0; j < br[sred].size(); j++) {
				int cvor1 = br[sred][j];
				for (int w = 0; w < v[cvor1].size(); w++) {
					int cvor2 = v[cvor1][w].X;
					int tez = v[cvor1][w].Y;
					
					if (m[a][cvor1] == 0 && a != cvor1) continue;
					if (m[cvor2][b] == 0 && b != cvor2) continue;
					
					mini = min(mini, m[a][cvor1]+tez+m[cvor2][b]);
				}
			}
			if (mini == 1e9) cout << "-1\n";
			else cout << mini << "\n";
		}
	}

	return 0;
}

Compilation message

toll.cpp: In function 'void rek(int, int)':
toll.cpp:26:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |   for (int j = 0; j < br[mid].size(); j++) {
      |                   ~~^~~~~~~~~~~~~~~~
toll.cpp:28:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |    for (int w = 0; w < br[i+1].size(); w++) {
      |                    ~~^~~~~~~~~~~~~~~~
toll.cpp:32:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |     for (int slj = 0; slj < rev[cvor].size(); slj++) {
      |                       ~~~~^~~~~~~~~~~~~~~~~~
toll.cpp:41:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |   for (int j = 0; j < br[mid+1].size(); j++) {
      |                   ~~^~~~~~~~~~~~~~~~~~
toll.cpp:43:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |    for (int w = 0; w < br[i-1].size(); w++) {
      |                    ~~^~~~~~~~~~~~~~~~
toll.cpp:47:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |     for (int slj = 0; slj < v[cvor].size(); slj++) {
      |                       ~~~~^~~~~~~~~~~~~~~~
toll.cpp: In function 'int main()':
toll.cpp:93:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   93 |    for (int j = 0; j < br[sred].size(); j++) {
      |                    ~~^~~~~~~~~~~~~~~~~
toll.cpp:95:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   95 |     for (int w = 0; w < v[cvor1].size(); w++) {
      |                     ~~^~~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 151 ms 46296 KB Output is correct
2 Correct 5 ms 8536 KB Output is correct
3 Correct 5 ms 8536 KB Output is correct
4 Correct 5 ms 8480 KB Output is correct
5 Correct 6 ms 8916 KB Output is correct
6 Correct 7 ms 8916 KB Output is correct
7 Correct 7 ms 8984 KB Output is correct
8 Correct 135 ms 46304 KB Output is correct
9 Correct 111 ms 46008 KB Output is correct
10 Correct 79 ms 42344 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 351 ms 73668 KB Output is correct
2 Correct 5 ms 8532 KB Output is correct
3 Correct 4 ms 8548 KB Output is correct
4 Correct 4 ms 8532 KB Output is correct
5 Correct 5 ms 8532 KB Output is correct
6 Correct 4 ms 8532 KB Output is correct
7 Correct 8 ms 9044 KB Output is correct
8 Correct 15 ms 9428 KB Output is correct
9 Correct 130 ms 46268 KB Output is correct
10 Correct 623 ms 100620 KB Output is correct
11 Correct 378 ms 73808 KB Output is correct
12 Correct 299 ms 97988 KB Output is correct
13 Correct 738 ms 91396 KB Output is correct
14 Correct 366 ms 61420 KB Output is correct
15 Correct 488 ms 87664 KB Output is correct
16 Correct 479 ms 87512 KB Output is correct

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 8536 KB Output is correct
2 Correct 6 ms 8540 KB Output is correct
3 Correct 4 ms 8540 KB Output is correct
4 Correct 5 ms 8532 KB Output is correct
5 Correct 6 ms 8536 KB Output is correct
6 Correct 6 ms 8916 KB Output is correct
7 Correct 8 ms 9192 KB Output is correct
8 Correct 15 ms 10044 KB Output is correct
9 Correct 13 ms 9812 KB Output is correct
10 Correct 117 ms 46156 KB Output is correct
11 Correct 344 ms 73556 KB Output is correct
12 Correct 608 ms 100496 KB Output is correct
13 Correct 626 ms 101324 KB Output is correct
14 Correct 531 ms 99404 KB Output is correct
15 Correct 473 ms 87548 KB Output is correct
16 Correct 483 ms 87516 KB Output is correct

Subtask #4
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 8536 KB Output is correct
2 Correct 6 ms 8540 KB Output is correct
3 Correct 4 ms 8540 KB Output is correct
4 Correct 5 ms 8532 KB Output is correct
5 Correct 6 ms 8536 KB Output is correct
6 Correct 6 ms 8916 KB Output is correct
7 Correct 8 ms 9192 KB Output is correct
8 Correct 15 ms 10044 KB Output is correct
9 Correct 13 ms 9812 KB Output is correct
10 Correct 117 ms 46156 KB Output is correct
11 Correct 344 ms 73556 KB Output is correct
12 Correct 608 ms 100496 KB Output is correct
13 Correct 626 ms 101324 KB Output is correct
14 Correct 531 ms 99404 KB Output is correct
15 Correct 473 ms 87548 KB Output is correct
16 Correct 483 ms 87516 KB Output is correct
17 Correct 349 ms 73496 KB Output is correct
18 Correct 5 ms 8424 KB Output is correct
19 Correct 5 ms 8532 KB Output is correct
20 Correct 5 ms 8532 KB Output is correct
21 Correct 5 ms 8660 KB Output is correct
22 Correct 5 ms 8532 KB Output is correct
23 Correct 7 ms 9044 KB Output is correct
24 Correct 12 ms 9340 KB Output is correct
25 Correct 23 ms 10000 KB Output is correct
26 Correct 18 ms 9788 KB Output is correct
27 Correct 121 ms 46084 KB Output is correct
28 Correct 650 ms 100500 KB Output is correct
29 Correct 630 ms 101292 KB Output is correct
30 Correct 519 ms 99484 KB Output is correct

Subtask #5
44.0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 151 ms 46296 KB Output is correct
2 Correct 5 ms 8536 KB Output is correct
3 Correct 5 ms 8536 KB Output is correct
4 Correct 5 ms 8480 KB Output is correct
5 Correct 6 ms 8916 KB Output is correct
6 Correct 7 ms 8916 KB Output is correct
7 Correct 7 ms 8984 KB Output is correct
8 Correct 135 ms 46304 KB Output is correct
9 Correct 111 ms 46008 KB Output is correct
10 Correct 79 ms 42344 KB Output is correct
11 Correct 351 ms 73668 KB Output is correct
12 Correct 5 ms 8532 KB Output is correct
13 Correct 4 ms 8548 KB Output is correct
14 Correct 4 ms 8532 KB Output is correct
15 Correct 5 ms 8532 KB Output is correct
16 Correct 4 ms 8532 KB Output is correct
17 Correct 8 ms 9044 KB Output is correct
18 Correct 15 ms 9428 KB Output is correct
19 Correct 130 ms 46268 KB Output is correct
20 Correct 623 ms 100620 KB Output is correct
21 Correct 378 ms 73808 KB Output is correct
22 Correct 299 ms 97988 KB Output is correct
23 Correct 738 ms 91396 KB Output is correct
24 Correct 366 ms 61420 KB Output is correct
25 Correct 488 ms 87664 KB Output is correct
26 Correct 479 ms 87512 KB Output is correct
27 Correct 5 ms 8536 KB Output is correct
28 Correct 6 ms 8540 KB Output is correct
29 Correct 4 ms 8540 KB Output is correct
30 Correct 5 ms 8532 KB Output is correct
31 Correct 6 ms 8536 KB Output is correct
32 Correct 6 ms 8916 KB Output is correct
33 Correct 8 ms 9192 KB Output is correct
34 Correct 15 ms 10044 KB Output is correct
35 Correct 13 ms 9812 KB Output is correct
36 Correct 117 ms 46156 KB Output is correct
37 Correct 344 ms 73556 KB Output is correct
38 Correct 608 ms 100496 KB Output is correct
39 Correct 626 ms 101324 KB Output is correct
40 Correct 531 ms 99404 KB Output is correct
41 Correct 473 ms 87548 KB Output is correct
42 Correct 483 ms 87516 KB Output is correct
43 Correct 349 ms 73496 KB Output is correct
44 Correct 5 ms 8424 KB Output is correct
45 Correct 5 ms 8532 KB Output is correct
46 Correct 5 ms 8532 KB Output is correct
47 Correct 5 ms 8660 KB Output is correct
48 Correct 5 ms 8532 KB Output is correct
49 Correct 7 ms 9044 KB Output is correct
50 Correct 12 ms 9340 KB Output is correct
51 Correct 23 ms 10000 KB Output is correct
52 Correct 18 ms 9788 KB Output is correct
53 Correct 121 ms 46084 KB Output is correct
54 Correct 650 ms 100500 KB Output is correct
55 Correct 630 ms 101292 KB Output is correct
56 Correct 519 ms 99484 KB Output is correct
57 Correct 961 ms 127172 KB Output is correct
58 Correct 122 ms 46308 KB Output is correct
59 Correct 382 ms 73876 KB Output is correct