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Submission #702487

# Submission time Handle Problem Language Result Execution time Memory
702487 2023-02-24T07:52:31 Z RandomLB Toll (BOI17_toll) C++17
100 / 100
 205 ms 12608 KB 
#include <bits/stdc++.h>
#include <vector>
using namespace std;
typedef long long ll;
typedef pair<int, int> pi;
#define F first
#define S second
#define pb push_back
#define siz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define ms(x, a) memset(x, a, sizeof(x))
#define deb(...) logger(#__VA_ARGS__, __VA_ARGS__)
template<typename ...Args>
void logger(string vars, Args&&... values){
	string delim = "";
	cout << vars << " = ";
	(...,(cout << delim << values, delim = ", "));
	cout << endl;
}
const int MOD = 1e9+7;
const int INF = 0x3f3f3f3f;
//=================================
const int MAX = 5e4+5;
vector<pi> adj[MAX], radj[MAX];
int tl[MAX], tr[MAX], res[MAX], dis[5][MAX], k;
bool vis[MAX];
 
void solve(int l, int r, vector<int> vec){
	if (l/k == r/k) return;
	int m = (l+(r-l)/2)/k;
	//deb(l, r, m);
	for (int i = 0; i < k; i++){
		for (int j = l; j <= r; j++){
			dis[i][j] = INF;
			vis[j] = false;
		}
		queue<int> q;
		q.push(m*k+i); dis[i][m*k+i] = 0;
		while (siz(q)){
			int v = q.front(); q.pop();
			for (auto[u, w]: radj[v]){
				if (u < l) continue;
				dis[i][u] = min(dis[i][u], dis[i][v]+w);
				if (!vis[u]){ vis[u] = true; q.push(u); }
			}
		}
		q.push((m+1)*k+i); dis[i][(m+1)*k+i] = 0;
		while (siz(q)){
			int v = q.front(); q.pop();
			for (auto[u, w]: adj[v]){
				if (u > r) continue;
				dis[i][u] = min(dis[i][u], dis[i][v]+w);
				if (!vis[u]){ vis[u] = true; q.push(u); }
			}
		}
	}
	//deb(dis[2][0], dis[2][12]);
	vector<int> v1, v2;
	for (int i: vec){
		//deb(i, tl[i], tr[i]);
		if (tl[i]/k <= m && tr[i]/k > m){
			for (int a = 0; a < k; a++){
				for (auto[b, w]: adj[m*k+a]){
					res[i] = min(res[i], dis[a][tl[i]]+w+dis[b-(m+1)*k][tr[i]]);
				}
			}
		} else if (tr[i]/k <= m) v1.pb(i); else v2.pb(i);
	}
	solve(l, (m+1)*k-1, v1); solve((m+1)*k, r, v2);
}
 
int main(){
	cin.tie(0)->sync_with_stdio(0);
	int n, m, q; cin >> k >> n >> m >> q;
	for (int i = 1; i <= m; i++){
		int a, b, w; cin >> a >> b >> w;
		adj[a].pb({b, w});
		radj[b].pb({a, w});
	}
	vector<int> v;
	for (int i = 1; i <= q; i++){
		cin >> tl[i] >> tr[i];
		v.pb(i);
	}
	ms(res, INF);
	solve(0, n/k*k+k-1, v);
	for (int i = 1; i <= q; i++) cout << (res[i] < INF? res[i] : -1) << "\n";
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 41 ms 6720 KB Output is correct
2 Correct 1 ms 2772 KB Output is correct
3 Correct 2 ms 2804 KB Output is correct
4 Correct 2 ms 2772 KB Output is correct
5 Correct 2 ms 2900 KB Output is correct
6 Correct 3 ms 2944 KB Output is correct
7 Correct 3 ms 2900 KB Output is correct
8 Correct 48 ms 6688 KB Output is correct
9 Correct 31 ms 6476 KB Output is correct
10 Correct 9 ms 3460 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 90 ms 8324 KB Output is correct
2 Correct 2 ms 2772 KB Output is correct
3 Correct 2 ms 2804 KB Output is correct
4 Correct 1 ms 2772 KB Output is correct
5 Correct 2 ms 2808 KB Output is correct
6 Correct 2 ms 2900 KB Output is correct
7 Correct 4 ms 3200 KB Output is correct
8 Correct 5 ms 3284 KB Output is correct
9 Correct 39 ms 7292 KB Output is correct
10 Correct 112 ms 10904 KB Output is correct
11 Correct 80 ms 8380 KB Output is correct
12 Correct 67 ms 8084 KB Output is correct
13 Correct 127 ms 11380 KB Output is correct
14 Correct 64 ms 8056 KB Output is correct
15 Correct 78 ms 7500 KB Output is correct
16 Correct 72 ms 7372 KB Output is correct

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2772 KB Output is correct
2 Correct 2 ms 2772 KB Output is correct
3 Correct 2 ms 2808 KB Output is correct
4 Correct 1 ms 2900 KB Output is correct
5 Correct 2 ms 2900 KB Output is correct
6 Correct 2 ms 2948 KB Output is correct
7 Correct 3 ms 2984 KB Output is correct
8 Correct 4 ms 3156 KB Output is correct
9 Correct 3 ms 3080 KB Output is correct
10 Correct 50 ms 7020 KB Output is correct
11 Correct 67 ms 7860 KB Output is correct
12 Correct 110 ms 10508 KB Output is correct
13 Correct 113 ms 11228 KB Output is correct
14 Correct 115 ms 9396 KB Output is correct
15 Correct 81 ms 7400 KB Output is correct
16 Correct 71 ms 7300 KB Output is correct

Subtask #4
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2772 KB Output is correct
2 Correct 2 ms 2772 KB Output is correct
3 Correct 2 ms 2808 KB Output is correct
4 Correct 1 ms 2900 KB Output is correct
5 Correct 2 ms 2900 KB Output is correct
6 Correct 2 ms 2948 KB Output is correct
7 Correct 3 ms 2984 KB Output is correct
8 Correct 4 ms 3156 KB Output is correct
9 Correct 3 ms 3080 KB Output is correct
10 Correct 50 ms 7020 KB Output is correct
11 Correct 67 ms 7860 KB Output is correct
12 Correct 110 ms 10508 KB Output is correct
13 Correct 113 ms 11228 KB Output is correct
14 Correct 115 ms 9396 KB Output is correct
15 Correct 81 ms 7400 KB Output is correct
16 Correct 71 ms 7300 KB Output is correct
17 Correct 75 ms 8060 KB Output is correct
18 Correct 1 ms 2772 KB Output is correct
19 Correct 1 ms 2772 KB Output is correct
20 Correct 1 ms 2772 KB Output is correct
21 Correct 2 ms 2900 KB Output is correct
22 Correct 2 ms 2900 KB Output is correct
23 Correct 3 ms 3028 KB Output is correct
24 Correct 4 ms 3024 KB Output is correct
25 Correct 5 ms 3156 KB Output is correct
26 Correct 4 ms 3156 KB Output is correct
27 Correct 40 ms 7156 KB Output is correct
28 Correct 109 ms 10704 KB Output is correct
29 Correct 123 ms 11308 KB Output is correct
30 Correct 93 ms 9516 KB Output is correct

Subtask #5
44.0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 41 ms 6720 KB Output is correct
2 Correct 1 ms 2772 KB Output is correct
3 Correct 2 ms 2804 KB Output is correct
4 Correct 2 ms 2772 KB Output is correct
5 Correct 2 ms 2900 KB Output is correct
6 Correct 3 ms 2944 KB Output is correct
7 Correct 3 ms 2900 KB Output is correct
8 Correct 48 ms 6688 KB Output is correct
9 Correct 31 ms 6476 KB Output is correct
10 Correct 9 ms 3460 KB Output is correct
11 Correct 90 ms 8324 KB Output is correct
12 Correct 2 ms 2772 KB Output is correct
13 Correct 2 ms 2804 KB Output is correct
14 Correct 1 ms 2772 KB Output is correct
15 Correct 2 ms 2808 KB Output is correct
16 Correct 2 ms 2900 KB Output is correct
17 Correct 4 ms 3200 KB Output is correct
18 Correct 5 ms 3284 KB Output is correct
19 Correct 39 ms 7292 KB Output is correct
20 Correct 112 ms 10904 KB Output is correct
21 Correct 80 ms 8380 KB Output is correct
22 Correct 67 ms 8084 KB Output is correct
23 Correct 127 ms 11380 KB Output is correct
24 Correct 64 ms 8056 KB Output is correct
25 Correct 78 ms 7500 KB Output is correct
26 Correct 72 ms 7372 KB Output is correct
27 Correct 2 ms 2772 KB Output is correct
28 Correct 2 ms 2772 KB Output is correct
29 Correct 2 ms 2808 KB Output is correct
30 Correct 1 ms 2900 KB Output is correct
31 Correct 2 ms 2900 KB Output is correct
32 Correct 2 ms 2948 KB Output is correct
33 Correct 3 ms 2984 KB Output is correct
34 Correct 4 ms 3156 KB Output is correct
35 Correct 3 ms 3080 KB Output is correct
36 Correct 50 ms 7020 KB Output is correct
37 Correct 67 ms 7860 KB Output is correct
38 Correct 110 ms 10508 KB Output is correct
39 Correct 113 ms 11228 KB Output is correct
40 Correct 115 ms 9396 KB Output is correct
41 Correct 81 ms 7400 KB Output is correct
42 Correct 71 ms 7300 KB Output is correct
43 Correct 75 ms 8060 KB Output is correct
44 Correct 1 ms 2772 KB Output is correct
45 Correct 1 ms 2772 KB Output is correct
46 Correct 1 ms 2772 KB Output is correct
47 Correct 2 ms 2900 KB Output is correct
48 Correct 2 ms 2900 KB Output is correct
49 Correct 3 ms 3028 KB Output is correct
50 Correct 4 ms 3024 KB Output is correct
51 Correct 5 ms 3156 KB Output is correct
52 Correct 4 ms 3156 KB Output is correct
53 Correct 40 ms 7156 KB Output is correct
54 Correct 109 ms 10704 KB Output is correct
55 Correct 123 ms 11308 KB Output is correct
56 Correct 93 ms 9516 KB Output is correct
57 Correct 205 ms 12608 KB Output is correct
58 Correct 40 ms 7368 KB Output is correct
59 Correct 85 ms 8584 KB Output is correct