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Submission #450412

# Submission time Handle Problem Language Result Execution time Memory
450412 2021-08-02T19:51:03 Z snoop Toll (BOI17_toll) C++14
100 / 100
 206 ms 22792 KB 
#include<bits/stdc++.h>
#include<math.h>
#define f first
#define s second
#define int long long
using namespace std;
const int N = 5e4 + 5, oo = 1e18;
int t, dist[N][5][5], d[N][5][5], n, k, m, q, ans[N];
vector<int> cur[N];
pair<int, int> p[N];
void solve(int l, int r, vector<int> v) {
	if (l == r) return;
	int mid = (l + r) / 2;
	vector<int> x, y;
	for (int i = l; i <= r; i++) cur[i].clear();
	for (int i = 0; i < v.size(); i++) {
		int ind = v[i];
		if (p[ind].s / k <= mid) x.push_back(v[i]);
		else if (p[ind].f / k >= mid + 1) y.push_back(v[i]);
		else cur[p[ind].s / k].push_back(v[i]);
	}
 
	for (int j = 0; j < k; j++) {
		for (int x = 0; x < k; x++) {
			d[mid + 1][j][x] = 0;
		}
	}
	for (int i = mid; i >= l; i--) {
		for (int from = 0; from < k; from++) {
			for (int to = 0; to < k; to++) {
				d[i][from][to] = oo;
				for (int j = 0; j < k; j++) {
					
					if(i == mid) d[i][from][to] = dist[i][from][to];
					else d[i][from][to] = min(d[i][from][to], d[i + 1][j][to] + dist[i][from][j]);
				}
			
 			}
		}
	}
	for (int i = mid + 2; i <= r; i++) {
		for (int from = 0; from < k; from++) {
			for (int to = 0; to < k; to++) {
				d[i][from][to] = oo;
				for (int j = 0; j < k; j++) {
					if(i == mid+2) d[i][from][to] = dist[i-1][to][from];
					else d[i][from][to] = min(d[i][from][to], d[i - 1][j][to] + dist[i-1][j][from]);
				}
			}
		}
	}
	for (int i = mid + 1; i <= r; i++) {
		for (int j = 0; j < cur[i].size(); j++) {
			int ind = cur[i][j];
			ans[ind] = oo;
			for (int x = 0; x < k; x++) {
					ans[ind] = min(ans[ind], d[p[ind].f / k][p[ind].f % k][x]
 
						+ d[i][p[ind].s % k][x] );
			}
			if (i == mid + 1) ans[ind] = d[p[ind].f / k][p[ind].f % k][p[ind].s % k];
 
		}
	}
	solve(l, mid, x);
	solve(mid + 1, r, y);
}
signed main() {
	cin >> k >> n >> m >> q;
	for (int i = 0; i <= n / k; i++) {
		for (int j = 0; j < k; j++) {
			for (int x = 0; x < k; x++) dist[i][j][x] = oo;
		}
	}
	for (int i = 1; i <= m; i++) {
		int u, v, w;
		cin >> u >> v >> w;
		dist[u / k][u % k][v % k] = w;
	}
	vector<int> all;
	for (int i = 1; i <= q; i++) {
		cin >> p[i].f >> p[i].s;
		ans[i] = oo;
		if (p[i].s <= p[i].f) ans[i] = -1;
		else all.push_back(i);
	}
	solve(0, n / k, all);
	for (int i = 1; i <= q; i++) {
		if (ans[i] == oo) cout << -1;
		else cout << ans[i];
		cout << "\n";
	}
 
}

Compilation message

toll.cpp: In function 'void solve(long long int, long long int, std::vector<long long int>)':
toll.cpp:16:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |  for (int i = 0; i < v.size(); i++) {
      |                  ~~^~~~~~~~~~
toll.cpp:53:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |   for (int j = 0; j < cur[i].size(); j++) {
      |                   ~~^~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 21880 KB Output is correct
2 Correct 1 ms 1484 KB Output is correct
3 Correct 1 ms 1484 KB Output is correct
4 Correct 1 ms 1484 KB Output is correct
5 Correct 3 ms 1884 KB Output is correct
6 Correct 3 ms 1868 KB Output is correct
7 Correct 3 ms 1868 KB Output is correct
8 Correct 78 ms 22644 KB Output is correct
9 Correct 72 ms 22636 KB Output is correct
10 Correct 27 ms 21900 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 106 ms 12140 KB Output is correct
2 Correct 1 ms 1484 KB Output is correct
3 Correct 1 ms 1484 KB Output is correct
4 Correct 1 ms 1484 KB Output is correct
5 Correct 1 ms 1484 KB Output is correct
6 Correct 1 ms 1484 KB Output is correct
7 Correct 9 ms 2636 KB Output is correct
8 Correct 10 ms 2508 KB Output is correct
9 Correct 73 ms 22792 KB Output is correct
10 Correct 150 ms 11076 KB Output is correct
11 Correct 112 ms 13764 KB Output is correct
12 Correct 90 ms 10100 KB Output is correct
13 Correct 154 ms 6568 KB Output is correct
14 Correct 90 ms 7000 KB Output is correct
15 Correct 87 ms 5208 KB Output is correct
16 Correct 88 ms 5192 KB Output is correct

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1484 KB Output is correct
2 Correct 1 ms 1484 KB Output is correct
3 Correct 1 ms 1484 KB Output is correct
4 Correct 1 ms 1484 KB Output is correct
5 Correct 1 ms 1484 KB Output is correct
6 Correct 2 ms 1996 KB Output is correct
7 Correct 3 ms 1612 KB Output is correct
8 Correct 5 ms 1612 KB Output is correct
9 Correct 4 ms 1612 KB Output is correct
10 Correct 65 ms 21748 KB Output is correct
11 Correct 104 ms 12748 KB Output is correct
12 Correct 136 ms 10104 KB Output is correct
13 Correct 152 ms 10308 KB Output is correct
14 Correct 135 ms 9708 KB Output is correct
15 Correct 85 ms 4932 KB Output is correct
16 Correct 84 ms 4980 KB Output is correct

Subtask #4
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1484 KB Output is correct
2 Correct 1 ms 1484 KB Output is correct
3 Correct 1 ms 1484 KB Output is correct
4 Correct 1 ms 1484 KB Output is correct
5 Correct 1 ms 1484 KB Output is correct
6 Correct 2 ms 1996 KB Output is correct
7 Correct 3 ms 1612 KB Output is correct
8 Correct 5 ms 1612 KB Output is correct
9 Correct 4 ms 1612 KB Output is correct
10 Correct 65 ms 21748 KB Output is correct
11 Correct 104 ms 12748 KB Output is correct
12 Correct 136 ms 10104 KB Output is correct
13 Correct 152 ms 10308 KB Output is correct
14 Correct 135 ms 9708 KB Output is correct
15 Correct 85 ms 4932 KB Output is correct
16 Correct 84 ms 4980 KB Output is correct
17 Correct 101 ms 13008 KB Output is correct
18 Correct 1 ms 1484 KB Output is correct
19 Correct 1 ms 1484 KB Output is correct
20 Correct 1 ms 1484 KB Output is correct
21 Correct 2 ms 1488 KB Output is correct
22 Correct 1 ms 1484 KB Output is correct
23 Correct 4 ms 2124 KB Output is correct
24 Correct 5 ms 1868 KB Output is correct
25 Correct 7 ms 1740 KB Output is correct
26 Correct 6 ms 1748 KB Output is correct
27 Correct 67 ms 22128 KB Output is correct
28 Correct 139 ms 10352 KB Output is correct
29 Correct 154 ms 10612 KB Output is correct
30 Correct 124 ms 10112 KB Output is correct

Subtask #5
44.0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 76 ms 21880 KB Output is correct
2 Correct 1 ms 1484 KB Output is correct
3 Correct 1 ms 1484 KB Output is correct
4 Correct 1 ms 1484 KB Output is correct
5 Correct 3 ms 1884 KB Output is correct
6 Correct 3 ms 1868 KB Output is correct
7 Correct 3 ms 1868 KB Output is correct
8 Correct 78 ms 22644 KB Output is correct
9 Correct 72 ms 22636 KB Output is correct
10 Correct 27 ms 21900 KB Output is correct
11 Correct 106 ms 12140 KB Output is correct
12 Correct 1 ms 1484 KB Output is correct
13 Correct 1 ms 1484 KB Output is correct
14 Correct 1 ms 1484 KB Output is correct
15 Correct 1 ms 1484 KB Output is correct
16 Correct 1 ms 1484 KB Output is correct
17 Correct 9 ms 2636 KB Output is correct
18 Correct 10 ms 2508 KB Output is correct
19 Correct 73 ms 22792 KB Output is correct
20 Correct 150 ms 11076 KB Output is correct
21 Correct 112 ms 13764 KB Output is correct
22 Correct 90 ms 10100 KB Output is correct
23 Correct 154 ms 6568 KB Output is correct
24 Correct 90 ms 7000 KB Output is correct
25 Correct 87 ms 5208 KB Output is correct
26 Correct 88 ms 5192 KB Output is correct
27 Correct 1 ms 1484 KB Output is correct
28 Correct 1 ms 1484 KB Output is correct
29 Correct 1 ms 1484 KB Output is correct
30 Correct 1 ms 1484 KB Output is correct
31 Correct 1 ms 1484 KB Output is correct
32 Correct 2 ms 1996 KB Output is correct
33 Correct 3 ms 1612 KB Output is correct
34 Correct 5 ms 1612 KB Output is correct
35 Correct 4 ms 1612 KB Output is correct
36 Correct 65 ms 21748 KB Output is correct
37 Correct 104 ms 12748 KB Output is correct
38 Correct 136 ms 10104 KB Output is correct
39 Correct 152 ms 10308 KB Output is correct
40 Correct 135 ms 9708 KB Output is correct
41 Correct 85 ms 4932 KB Output is correct
42 Correct 84 ms 4980 KB Output is correct
43 Correct 101 ms 13008 KB Output is correct
44 Correct 1 ms 1484 KB Output is correct
45 Correct 1 ms 1484 KB Output is correct
46 Correct 1 ms 1484 KB Output is correct
47 Correct 2 ms 1488 KB Output is correct
48 Correct 1 ms 1484 KB Output is correct
49 Correct 4 ms 2124 KB Output is correct
50 Correct 5 ms 1868 KB Output is correct
51 Correct 7 ms 1740 KB Output is correct
52 Correct 6 ms 1748 KB Output is correct
53 Correct 67 ms 22128 KB Output is correct
54 Correct 139 ms 10352 KB Output is correct
55 Correct 154 ms 10612 KB Output is correct
56 Correct 124 ms 10112 KB Output is correct
57 Correct 206 ms 10448 KB Output is correct
58 Correct 73 ms 22724 KB Output is correct
59 Correct 115 ms 13776 KB Output is correct