oj.uz

Submission #186904

# Submission time Handle Problem Language Result Execution time Memory
186904 2020-01-12T11:34:35 Z AlexPop28 Toll (BOI17_toll) C++11
100 / 100
 306 ms 49896 KB 
#include <bits/stdc++.h>
#define dbg() cerr <<
#define name(x) (#x) << ": " << (x) << ' ' <<
// a doua zi dupa 11 ore de somn merge mai bine garantez eu
// ah.. sau poate ca nu.. sau?

using namespace std;

const int INF = (int)1e9 + 5;

int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);

  int k, n, m, q; cin >> k >> n >> m >> q;
  int groups = (n + k - 1) / k;
  int log_groups = 32 - __builtin_clz(groups);
  vector<vector<vector<int>>> dist(log_groups,
    vector<vector<int>>(n,
      vector<int>(k, INF)));
  vector<vector<pair<int, int>>> adj(n);
  for (int i = 0; i < m; ++i) {
    int a, b, c; cin >> a >> b >> c;
    adj[a].emplace_back(b, c);
    adj[b].emplace_back(a, c);
    dist[0][a][b % k] = c;
  }
  
  for (int p = 1; p < log_groups; ++p) {
    for (int from = 0; from / k + (1 << p) <= (n - 1) / k; ++from) {
      for (int to = 0; to < k; ++to) {
        int gr = from / k + (1 << (p - 1));
        int lst = min((gr + 1) * k, n);
        for (int x = gr * k, r = 0; x < lst; ++x, ++r) {
          dist[p][from][to] = min(dist[p][from][to],
            dist[p - 1][from][r] + dist[p - 1][x][to]);
        }
      }
    }
  }
 
  while (q--) {
    int a, b; cin >> a >> b;
    //dbg() name(a) name(b) endl;
    vector<int> d(k, INF);
    d[a % k] = 0;
    a = a / k;
    int len = b / k - a;
    for (int bit = 0; (1 << bit) <= len; ++bit) {
      if (((1 << bit) & len) == 0) continue;
      vector<int> nd(k, INF);
      //dbg() name(bit) endl;
      for (int from = a * k; from < (a + 1) * k; ++from) {
        for (int x = 0; x < k; ++x) {
          nd[x] = min(nd[x], d[from - a * k] + dist[bit][from][x]);
        }
      }
      a += 1 << bit;
      d = move(nd);
    }
    int ans = d[b % k];
    if (ans == INF) ans = -1;
    cout << ans << '\n';
  }
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 164 ms 48004 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 380 KB Output is correct
5 Correct 4 ms 888 KB Output is correct
6 Correct 4 ms 1016 KB Output is correct
7 Correct 6 ms 1016 KB Output is correct
8 Correct 209 ms 47976 KB Output is correct
9 Correct 155 ms 47840 KB Output is correct
10 Correct 115 ms 46968 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 198 ms 47072 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 3 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 392 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 10 ms 1016 KB Output is correct
8 Correct 11 ms 1188 KB Output is correct
9 Correct 172 ms 47816 KB Output is correct
10 Correct 239 ms 49224 KB Output is correct
11 Correct 200 ms 47088 KB Output is correct
12 Correct 173 ms 46432 KB Output is correct
13 Correct 193 ms 29808 KB Output is correct
14 Correct 134 ms 28344 KB Output is correct
15 Correct 139 ms 26004 KB Output is correct
16 Correct 135 ms 26020 KB Output is correct

Subtask #3
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 248 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 4 ms 888 KB Output is correct
7 Correct 4 ms 892 KB Output is correct
8 Correct 6 ms 1016 KB Output is correct
9 Correct 5 ms 888 KB Output is correct
10 Correct 152 ms 47840 KB Output is correct
11 Correct 178 ms 46888 KB Output is correct
12 Correct 236 ms 49088 KB Output is correct
13 Correct 238 ms 49584 KB Output is correct
14 Correct 210 ms 48204 KB Output is correct
15 Correct 133 ms 25912 KB Output is correct
16 Correct 134 ms 25884 KB Output is correct

Subtask #4
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 248 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 4 ms 888 KB Output is correct
7 Correct 4 ms 892 KB Output is correct
8 Correct 6 ms 1016 KB Output is correct
9 Correct 5 ms 888 KB Output is correct
10 Correct 152 ms 47840 KB Output is correct
11 Correct 178 ms 46888 KB Output is correct
12 Correct 236 ms 49088 KB Output is correct
13 Correct 238 ms 49584 KB Output is correct
14 Correct 210 ms 48204 KB Output is correct
15 Correct 133 ms 25912 KB Output is correct
16 Correct 134 ms 25884 KB Output is correct
17 Correct 231 ms 46904 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 2 ms 376 KB Output is correct
20 Correct 2 ms 376 KB Output is correct
21 Correct 2 ms 376 KB Output is correct
22 Correct 2 ms 380 KB Output is correct
23 Correct 6 ms 888 KB Output is correct
24 Correct 6 ms 1016 KB Output is correct
25 Correct 8 ms 1016 KB Output is correct
26 Correct 7 ms 1016 KB Output is correct
27 Correct 146 ms 47876 KB Output is correct
28 Correct 233 ms 49124 KB Output is correct
29 Correct 254 ms 49896 KB Output is correct
30 Correct 219 ms 48268 KB Output is correct

Subtask #5
44.0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 164 ms 48004 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 380 KB Output is correct
5 Correct 4 ms 888 KB Output is correct
6 Correct 4 ms 1016 KB Output is correct
7 Correct 6 ms 1016 KB Output is correct
8 Correct 209 ms 47976 KB Output is correct
9 Correct 155 ms 47840 KB Output is correct
10 Correct 115 ms 46968 KB Output is correct
11 Correct 198 ms 47072 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 3 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 392 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 10 ms 1016 KB Output is correct
18 Correct 11 ms 1188 KB Output is correct
19 Correct 172 ms 47816 KB Output is correct
20 Correct 239 ms 49224 KB Output is correct
21 Correct 200 ms 47088 KB Output is correct
22 Correct 173 ms 46432 KB Output is correct
23 Correct 193 ms 29808 KB Output is correct
24 Correct 134 ms 28344 KB Output is correct
25 Correct 139 ms 26004 KB Output is correct
26 Correct 135 ms 26020 KB Output is correct
27 Correct 2 ms 376 KB Output is correct
28 Correct 2 ms 248 KB Output is correct
29 Correct 2 ms 376 KB Output is correct
30 Correct 2 ms 376 KB Output is correct
31 Correct 2 ms 376 KB Output is correct
32 Correct 4 ms 888 KB Output is correct
33 Correct 4 ms 892 KB Output is correct
34 Correct 6 ms 1016 KB Output is correct
35 Correct 5 ms 888 KB Output is correct
36 Correct 152 ms 47840 KB Output is correct
37 Correct 178 ms 46888 KB Output is correct
38 Correct 236 ms 49088 KB Output is correct
39 Correct 238 ms 49584 KB Output is correct
40 Correct 210 ms 48204 KB Output is correct
41 Correct 133 ms 25912 KB Output is correct
42 Correct 134 ms 25884 KB Output is correct
43 Correct 231 ms 46904 KB Output is correct
44 Correct 2 ms 376 KB Output is correct
45 Correct 2 ms 376 KB Output is correct
46 Correct 2 ms 376 KB Output is correct
47 Correct 2 ms 376 KB Output is correct
48 Correct 2 ms 380 KB Output is correct
49 Correct 6 ms 888 KB Output is correct
50 Correct 6 ms 1016 KB Output is correct
51 Correct 8 ms 1016 KB Output is correct
52 Correct 7 ms 1016 KB Output is correct
53 Correct 146 ms 47876 KB Output is correct
54 Correct 233 ms 49124 KB Output is correct
55 Correct 254 ms 49896 KB Output is correct
56 Correct 219 ms 48268 KB Output is correct
57 Correct 306 ms 47716 KB Output is correct
58 Correct 163 ms 47880 KB Output is correct
59 Correct 206 ms 47216 KB Output is correct