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Submission #714645

# Submission time Handle Problem Language Result Execution time Memory
714645 2023-03-25T07:13:45 Z parsadox2 Toll (BOI17_toll) C++14
100 / 100
 228 ms 5072 KB 
#include <bits/stdc++.h>
#define pb 		push_back
#define F		first
#define S 		second
#define debug(x)    cout << #x << "= " << x << ", "
#define ll 		long long
#define fast 		ios::sync_with_stdio(false), cin.tie(0),  cout.tie(0)
#define SZ(x)         (int) x.size()
#define wall 		cout << endl;
using namespace std;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
 
const int maxn = 5e4 + 10 , maxsq = 100 , maxk = 7 , inf = 1e9;
int n , m , q , k , dis[maxn] , dis_jmp[maxn][maxk];
vector <pair<int , int>> adj[maxn];
vector <int> vec;
 
void Relax()
{
	for(auto u : vec)   dis[u] = inf;
	vec.clear();
}
 
void find_nex(int now , int to)
{
	int l = now * k , r = min(n , l + k);
	for(int i = l ; i < r ; i++)  vec.pb(i);
	if(now == to)  return;
	for(int i = l ; i < r ; i++)
		for(auto u : adj[i])
			dis[u.F] = min(dis[u.F] , dis[i] + u.S);
	find_nex(now + 1 , to);
}
 
void Build(int num)
{
	int l = num * k , r = min(n , l + k);
	int l2 = (num + maxsq) * k;
	for(int i = l ; i < r ; i++)
	{
		dis[i] = 0;
		find_nex(num , num + maxsq);
		for(int j = 0 ; j < k ; j++)
			dis_jmp[i][j] = dis[l2 + j];
		Relax();
	}
}
 
void jmp_nex(int a , int b)
{
	int l = a * k , r = min(n , l + k) , l2 = (a + maxsq) * k;
	for(int i = l ; i < r ; i++)  vec.pb(i);
	if(a == b)  return;
	for(int i = l ; i < r ; i++)
		for(int j = 0 ; j < k ; j++)
			dis[l2 + j] = min(dis[l2 + j] , dis[i] + dis_jmp[i][j]);
	jmp_nex(a + maxsq , b);
}
 
void Find_dis(int a , int b)
{
	int tmp = (a + maxsq) / maxsq;
	tmp *= maxsq;
	if(b <= tmp)
	{
		find_nex(a , b);
		return;
	}
	find_nex(a , tmp);
	int tmp2 = b / maxsq;
	tmp2 *= maxsq;
	jmp_nex(tmp , tmp2);
	find_nex(tmp2 , b);
}
 
int32_t main()
{
	fast;
	cin >> k >> n >> m >> q;
	for(int i = 0 ; i < n ; i++)  dis[i] = inf;
	for(int i = 0 ; i < m ; i++)
	{
		int v , u , c;  cin >> v >> u >> c;
		adj[v].pb({u , c});
	}
	for(int i = 0 ; (i + maxsq) * k < n ; i += maxsq)  Build(i);
	while(q--)
	{
		int v , u;  cin >> v >> u;
		if(v > u)
		{
			cout << -1 << '\n';
			continue;
		}
		dis[v] = 0;
		vec.pb(v);
		Find_dis(v / k , u / k);
		cout << (dis[u] == inf ? -1 : dis[u]) << '\n';
		Relax();
	}
	return 0;
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 68 ms 4684 KB Output is correct
2 Correct 1 ms 1512 KB Output is correct
3 Correct 1 ms 1492 KB Output is correct
4 Correct 1 ms 1492 KB Output is correct
5 Correct 3 ms 1492 KB Output is correct
6 Correct 3 ms 1492 KB Output is correct
7 Correct 3 ms 1492 KB Output is correct
8 Correct 62 ms 4644 KB Output is correct
9 Correct 55 ms 4564 KB Output is correct
10 Correct 29 ms 3084 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 120 ms 4296 KB Output is correct
2 Correct 2 ms 1492 KB Output is correct
3 Correct 1 ms 1492 KB Output is correct
4 Correct 1 ms 1492 KB Output is correct
5 Correct 1 ms 1492 KB Output is correct
6 Correct 1 ms 1492 KB Output is correct
7 Correct 22 ms 1568 KB Output is correct
8 Correct 43 ms 1696 KB Output is correct
9 Correct 76 ms 4640 KB Output is correct
10 Correct 200 ms 4928 KB Output is correct
11 Correct 146 ms 4280 KB Output is correct
12 Correct 170 ms 3832 KB Output is correct
13 Correct 126 ms 4616 KB Output is correct
14 Correct 95 ms 3716 KB Output is correct
15 Correct 96 ms 3168 KB Output is correct
16 Correct 99 ms 3176 KB Output is correct

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1492 KB Output is correct
2 Correct 1 ms 1492 KB Output is correct
3 Correct 1 ms 1492 KB Output is correct
4 Correct 1 ms 1492 KB Output is correct
5 Correct 1 ms 1492 KB Output is correct
6 Correct 2 ms 1492 KB Output is correct
7 Correct 2 ms 1492 KB Output is correct
8 Correct 4 ms 1492 KB Output is correct
9 Correct 3 ms 1492 KB Output is correct
10 Correct 24 ms 4556 KB Output is correct
11 Correct 36 ms 4136 KB Output is correct
12 Correct 52 ms 4824 KB Output is correct
13 Correct 50 ms 4992 KB Output is correct
14 Correct 41 ms 4432 KB Output is correct
15 Correct 30 ms 3172 KB Output is correct
16 Correct 33 ms 3144 KB Output is correct

Subtask #4
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1492 KB Output is correct
2 Correct 1 ms 1492 KB Output is correct
3 Correct 1 ms 1492 KB Output is correct
4 Correct 1 ms 1492 KB Output is correct
5 Correct 1 ms 1492 KB Output is correct
6 Correct 2 ms 1492 KB Output is correct
7 Correct 2 ms 1492 KB Output is correct
8 Correct 4 ms 1492 KB Output is correct
9 Correct 3 ms 1492 KB Output is correct
10 Correct 24 ms 4556 KB Output is correct
11 Correct 36 ms 4136 KB Output is correct
12 Correct 52 ms 4824 KB Output is correct
13 Correct 50 ms 4992 KB Output is correct
14 Correct 41 ms 4432 KB Output is correct
15 Correct 30 ms 3172 KB Output is correct
16 Correct 33 ms 3144 KB Output is correct
17 Correct 59 ms 4200 KB Output is correct
18 Correct 1 ms 1492 KB Output is correct
19 Correct 1 ms 1492 KB Output is correct
20 Correct 1 ms 1492 KB Output is correct
21 Correct 1 ms 1492 KB Output is correct
22 Correct 1 ms 1492 KB Output is correct
23 Correct 6 ms 1580 KB Output is correct
24 Correct 10 ms 1580 KB Output is correct
25 Correct 20 ms 1616 KB Output is correct
26 Correct 23 ms 1492 KB Output is correct
27 Correct 32 ms 4596 KB Output is correct
28 Correct 84 ms 4832 KB Output is correct
29 Correct 86 ms 5072 KB Output is correct
30 Correct 81 ms 4436 KB Output is correct

Subtask #5
44.0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 68 ms 4684 KB Output is correct
2 Correct 1 ms 1512 KB Output is correct
3 Correct 1 ms 1492 KB Output is correct
4 Correct 1 ms 1492 KB Output is correct
5 Correct 3 ms 1492 KB Output is correct
6 Correct 3 ms 1492 KB Output is correct
7 Correct 3 ms 1492 KB Output is correct
8 Correct 62 ms 4644 KB Output is correct
9 Correct 55 ms 4564 KB Output is correct
10 Correct 29 ms 3084 KB Output is correct
11 Correct 120 ms 4296 KB Output is correct
12 Correct 2 ms 1492 KB Output is correct
13 Correct 1 ms 1492 KB Output is correct
14 Correct 1 ms 1492 KB Output is correct
15 Correct 1 ms 1492 KB Output is correct
16 Correct 1 ms 1492 KB Output is correct
17 Correct 22 ms 1568 KB Output is correct
18 Correct 43 ms 1696 KB Output is correct
19 Correct 76 ms 4640 KB Output is correct
20 Correct 200 ms 4928 KB Output is correct
21 Correct 146 ms 4280 KB Output is correct
22 Correct 170 ms 3832 KB Output is correct
23 Correct 126 ms 4616 KB Output is correct
24 Correct 95 ms 3716 KB Output is correct
25 Correct 96 ms 3168 KB Output is correct
26 Correct 99 ms 3176 KB Output is correct
27 Correct 1 ms 1492 KB Output is correct
28 Correct 1 ms 1492 KB Output is correct
29 Correct 1 ms 1492 KB Output is correct
30 Correct 1 ms 1492 KB Output is correct
31 Correct 1 ms 1492 KB Output is correct
32 Correct 2 ms 1492 KB Output is correct
33 Correct 2 ms 1492 KB Output is correct
34 Correct 4 ms 1492 KB Output is correct
35 Correct 3 ms 1492 KB Output is correct
36 Correct 24 ms 4556 KB Output is correct
37 Correct 36 ms 4136 KB Output is correct
38 Correct 52 ms 4824 KB Output is correct
39 Correct 50 ms 4992 KB Output is correct
40 Correct 41 ms 4432 KB Output is correct
41 Correct 30 ms 3172 KB Output is correct
42 Correct 33 ms 3144 KB Output is correct
43 Correct 59 ms 4200 KB Output is correct
44 Correct 1 ms 1492 KB Output is correct
45 Correct 1 ms 1492 KB Output is correct
46 Correct 1 ms 1492 KB Output is correct
47 Correct 1 ms 1492 KB Output is correct
48 Correct 1 ms 1492 KB Output is correct
49 Correct 6 ms 1580 KB Output is correct
50 Correct 10 ms 1580 KB Output is correct
51 Correct 20 ms 1616 KB Output is correct
52 Correct 23 ms 1492 KB Output is correct
53 Correct 32 ms 4596 KB Output is correct
54 Correct 84 ms 4832 KB Output is correct
55 Correct 86 ms 5072 KB Output is correct
56 Correct 81 ms 4436 KB Output is correct
57 Correct 228 ms 4964 KB Output is correct
58 Correct 59 ms 4644 KB Output is correct
59 Correct 131 ms 4264 KB Output is correct