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Submission #1069179

# Submission time Handle Problem Language Result Execution time Memory
1069179 2024-08-21T17:04:10 Z duckindog Inside information (BOI21_servers) C++17
50 / 100
 114 ms 47888 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
const int N = 120'000 + 10,
          MAX = 1'000'000;
int n, k;
vector<pair<int, int>> ad[N];
vector<tuple<int, int, int>> Q;
 
int st[N], ed[N], it;
int f[N][18], increase[N][18], decrease[N][18];
void dfs(int u, int p = -1) { 
  st[u] = ++it;
 
  for (int i = 1; i <= 17; ++i) { 
    f[u][i] = f[f[u][i - 1]][i - 1];
    if (increase[u][i - 1] < increase[f[u][i - 1]][0]) 
      increase[u][i] = increase[f[u][i - 1]][i - 1];
 
    if (decrease[u][i - 1] > decrease[f[u][i - 1]][0])
      decrease[u][i] = decrease[f[u][i - 1]][i - 1];
  }
 
  for (const auto& [v, w] : ad[u]) { 
    if (v == p) continue;
    f[v][0] = u;
    increase[v][0] = decrease[v][0] = w;
    dfs(v, u);
  }
 
  ed[u] = it;
}
inline bool anc(int u, int v) { return st[u] <= st[v] && ed[u] >= ed[v]; }
 
int get(int u, int v) { 
  int uwd = 0, dwd = MAX, ma = 0;
  for (int i = 17; i >= 0; --i) { 
    if (anc(f[u][i], v)) continue;
    if (uwd >= increase[u][0]) return MAX;
    uwd = increase[u][i];
    u = f[u][i];
  }
  if (!anc(u, v)) { 
    if (uwd >= increase[u][0]) return MAX;
    uwd = increase[u][0];
    u = f[u][0];
  } ma = uwd;
  
  for (int i = 17; i >= 0; --i) { 
    if (anc(f[v][i], u)) continue;
    if (dwd <= decrease[v][0]) return MAX;
    dwd = decrease[v][i];
    ma = max(ma, decrease[v][0]);
    v = f[v][i];
  }
  if (v != u) { 
    if (dwd <= decrease[v][0]) return MAX;
    dwd = decrease[v][0];
    ma = max(ma, decrease[v][0]);
    v = f[v][0];
  }
 
  return uwd < dwd ? ma : MAX;
}
 
int32_t main() { 
  cin.tie(0)->sync_with_stdio(0);
 
  cin >> n >> k;
  for (int i = 1; i < n + k; ++i) { 
    char type; cin >> type;
    if (type == 'S') { 
      int a, b; cin >> a >> b;
      ad[a].push_back({b, i});
      ad[b].push_back({a, i});
    }
 
    if (type == 'Q') { 
      int a, d; cin >> a >> d;
      Q.emplace_back(a, d, i);
    }
 
    if (type == 'C') { 
      int d; cin >> d;
      Q.emplace_back(0, d, i);
    }
  }
 
  memset(increase, 63, sizeof increase);
  dfs(f[1][0] = 1);
 
  for (const auto& [a, d, i] : Q) { 
    if (!a) continue;
    int time = get(d, a);
    cout << (time <= i ? "yes" : "no") << '\n';
  }
}

Subtask #1
2.5 / 2.5

# Verdict Execution time Memory Grader output
1 Correct 29 ms 15408 KB Output is correct
2 Correct 31 ms 15568 KB Output is correct
3 Correct 51 ms 20448 KB Output is correct
4 Correct 27 ms 20460 KB Output is correct
5 Correct 30 ms 18960 KB Output is correct
6 Correct 30 ms 20380 KB Output is correct

Subtask #2
0 / 2.5

# Verdict Execution time Memory Grader output
1 Correct 29 ms 15408 KB Output is correct
2 Correct 31 ms 15568 KB Output is correct
3 Correct 51 ms 20448 KB Output is correct
4 Correct 27 ms 20460 KB Output is correct
5 Correct 30 ms 18960 KB Output is correct
6 Correct 30 ms 20380 KB Output is correct
7 Incorrect 24 ms 17776 KB Extra information in the output file
8 Halted 0 ms 0 KB -

Subtask #3
2.5 / 2.5

# Verdict Execution time Memory Grader output
1 Correct 21 ms 16844 KB Output is correct
2 Correct 90 ms 35944 KB Output is correct
3 Correct 94 ms 35956 KB Output is correct

Subtask #4
0 / 2.5

# Verdict Execution time Memory Grader output
1 Correct 21 ms 16844 KB Output is correct
2 Correct 90 ms 35944 KB Output is correct
3 Correct 94 ms 35956 KB Output is correct
4 Incorrect 21 ms 16896 KB Extra information in the output file
5 Halted 0 ms 0 KB -

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 16860 KB Output is correct
2 Correct 106 ms 44548 KB Output is correct
3 Correct 88 ms 47888 KB Output is correct
4 Correct 88 ms 47616 KB Output is correct

Subtask #6
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 16860 KB Output is correct
2 Correct 106 ms 44548 KB Output is correct
3 Correct 88 ms 47888 KB Output is correct
4 Correct 88 ms 47616 KB Output is correct
5 Incorrect 21 ms 17612 KB Extra information in the output file
6 Halted 0 ms 0 KB -

Subtask #7
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 16844 KB Output is correct
2 Correct 77 ms 35848 KB Output is correct
3 Correct 93 ms 39840 KB Output is correct

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 16844 KB Output is correct
2 Correct 77 ms 35848 KB Output is correct
3 Correct 93 ms 39840 KB Output is correct
4 Incorrect 20 ms 17616 KB Extra information in the output file
5 Halted 0 ms 0 KB -

Subtask #9
12.5 / 12.5

# Verdict Execution time Memory Grader output
1 Correct 22 ms 16844 KB Output is correct
2 Correct 89 ms 44316 KB Output is correct
3 Correct 88 ms 47876 KB Output is correct
4 Correct 88 ms 47616 KB Output is correct
5 Correct 20 ms 17612 KB Output is correct
6 Correct 63 ms 39172 KB Output is correct
7 Correct 80 ms 39680 KB Output is correct
8 Correct 89 ms 40116 KB Output is correct
9 Correct 79 ms 40192 KB Output is correct
10 Correct 93 ms 44736 KB Output is correct
11 Correct 99 ms 44036 KB Output is correct

Subtask #10
0 / 12.5

# Verdict Execution time Memory Grader output
1 Correct 22 ms 16844 KB Output is correct
2 Correct 89 ms 44316 KB Output is correct
3 Correct 88 ms 47876 KB Output is correct
4 Correct 88 ms 47616 KB Output is correct
5 Correct 20 ms 17612 KB Output is correct
6 Correct 63 ms 39172 KB Output is correct
7 Correct 80 ms 39680 KB Output is correct
8 Correct 89 ms 40116 KB Output is correct
9 Correct 79 ms 40192 KB Output is correct
10 Correct 93 ms 44736 KB Output is correct
11 Correct 99 ms 44036 KB Output is correct
12 Incorrect 23 ms 17612 KB Extra information in the output file
13 Halted 0 ms 0 KB -

Subtask #11
17.5 / 17.5

# Verdict Execution time Memory Grader output
1 Correct 22 ms 16844 KB Output is correct
2 Correct 27 ms 19176 KB Output is correct
3 Correct 25 ms 20680 KB Output is correct
4 Correct 27 ms 20440 KB Output is correct
5 Correct 29 ms 18860 KB Output is correct
6 Correct 27 ms 20480 KB Output is correct
7 Correct 22 ms 17872 KB Output is correct
8 Correct 70 ms 38772 KB Output is correct
9 Correct 72 ms 38752 KB Output is correct
10 Correct 20 ms 17612 KB Output is correct
11 Correct 89 ms 47804 KB Output is correct
12 Correct 84 ms 47880 KB Output is correct
13 Correct 83 ms 47620 KB Output is correct
14 Correct 21 ms 17616 KB Output is correct
15 Correct 74 ms 39352 KB Output is correct
16 Correct 81 ms 39680 KB Output is correct
17 Correct 79 ms 40196 KB Output is correct
18 Correct 80 ms 40196 KB Output is correct
19 Correct 93 ms 44800 KB Output is correct
20 Correct 114 ms 44032 KB Output is correct
21 Correct 71 ms 39348 KB Output is correct
22 Correct 73 ms 39432 KB Output is correct
23 Correct 104 ms 39612 KB Output is correct
24 Correct 82 ms 39684 KB Output is correct
25 Correct 94 ms 41588 KB Output is correct
26 Correct 78 ms 39272 KB Output is correct
27 Correct 87 ms 39420 KB Output is correct

Subtask #12
0 / 17.5

# Verdict Execution time Memory Grader output
1 Correct 22 ms 16844 KB Output is correct
2 Correct 27 ms 19176 KB Output is correct
3 Correct 25 ms 20680 KB Output is correct
4 Correct 27 ms 20440 KB Output is correct
5 Correct 29 ms 18860 KB Output is correct
6 Correct 27 ms 20480 KB Output is correct
7 Correct 22 ms 17872 KB Output is correct
8 Correct 70 ms 38772 KB Output is correct
9 Correct 72 ms 38752 KB Output is correct
10 Correct 20 ms 17612 KB Output is correct
11 Correct 89 ms 47804 KB Output is correct
12 Correct 84 ms 47880 KB Output is correct
13 Correct 83 ms 47620 KB Output is correct
14 Correct 21 ms 17616 KB Output is correct
15 Correct 74 ms 39352 KB Output is correct
16 Correct 81 ms 39680 KB Output is correct
17 Correct 79 ms 40196 KB Output is correct
18 Correct 80 ms 40196 KB Output is correct
19 Correct 93 ms 44800 KB Output is correct
20 Correct 114 ms 44032 KB Output is correct
21 Correct 71 ms 39348 KB Output is correct
22 Correct 73 ms 39432 KB Output is correct
23 Correct 104 ms 39612 KB Output is correct
24 Correct 82 ms 39684 KB Output is correct
25 Correct 94 ms 41588 KB Output is correct
26 Correct 78 ms 39272 KB Output is correct
27 Correct 87 ms 39420 KB Output is correct
28 Incorrect 21 ms 17612 KB Extra information in the output file
29 Halted 0 ms 0 KB -