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답안 #1068653

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1068653 2024-08-21T11:10:05 Z duckindog Inside information (BOI21_servers) C++17
50 / 100
 118 ms 47872 KB 
#include <bits/stdc++.h>

using namespace std;

const int N = 120'000 + 10;
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] != -1 && increase[f[u][i - 1]][i - 1] != -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] != -1 && decrease[f[u][i - 1]][i - 1] != -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 = 1'000'000, ma = 0;
  for (int i = 17; i >= 0; --i) { 
    if (anc(f[u][i], v)) continue;
    if (uwd > increase[u][0] || increase[u][i] == -1) return -1;
    uwd = increase[u][i];
    u = f[u][i];
  }
  if (!anc(u, v)) { 
    if (uwd > increase[u][0] || increase[u][0] == -1) return -1;
    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] || decrease[v][i] == -1) return -1;
    dwd = decrease[v][i];
    ma = max(ma, decrease[v][0]);
    v = f[v][i];
  }
  
  if (v != u) { 
    if (dwd < decrease[v][0] || decrease[v][0] == -1) return -1;
    dwd = decrease[v][0];
    ma = max(ma, decrease[v][0]);
    v = f[v][0];
  }

  return uwd < dwd ? ma : -1;
}

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, -1, sizeof increase);
  memset(decrease, -1, sizeof decrease);
  dfs(f[1][0] = 1);

  for (const auto& [a, d, i] : Q) { 
    if (!a) continue;
    int time = get(d, a);
    cout << (time == -1 || time > i ? "no" : "yes") << '\n';
  }
}

Subtask #1
2.5 / 2.5

# 결과 실행 시간 메모리 Grader output
1 Correct 22 ms 25288 KB Output is correct
2 Correct 27 ms 25308 KB Output is correct
3 Correct 25 ms 25300 KB Output is correct
4 Correct 25 ms 25300 KB Output is correct
5 Correct 29 ms 25616 KB Output is correct
6 Correct 29 ms 25200 KB Output is correct

Subtask #2
0 / 2.5

# 결과 실행 시간 메모리 Grader output
1 Correct 22 ms 25288 KB Output is correct
2 Correct 27 ms 25308 KB Output is correct
3 Correct 25 ms 25300 KB Output is correct
4 Correct 25 ms 25300 KB Output is correct
5 Correct 29 ms 25616 KB Output is correct
6 Correct 29 ms 25200 KB Output is correct
7 Incorrect 24 ms 25284 KB Extra information in the output file
8 Halted 0 ms 0 KB -

Subtask #3
2.5 / 2.5

# 결과 실행 시간 메모리 Grader output
1 Correct 24 ms 25292 KB Output is correct
2 Correct 69 ms 35900 KB Output is correct
3 Correct 65 ms 35960 KB Output is correct

Subtask #4
0 / 2.5

# 결과 실행 시간 메모리 Grader output
1 Correct 24 ms 25292 KB Output is correct
2 Correct 69 ms 35900 KB Output is correct
3 Correct 65 ms 35960 KB Output is correct
4 Incorrect 22 ms 25284 KB Extra information in the output file
5 Halted 0 ms 0 KB -

Subtask #5
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 26 ms 25284 KB Output is correct
2 Correct 83 ms 44564 KB Output is correct
3 Correct 82 ms 47872 KB Output is correct
4 Correct 85 ms 47616 KB Output is correct

Subtask #6
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 26 ms 25284 KB Output is correct
2 Correct 83 ms 44564 KB Output is correct
3 Correct 82 ms 47872 KB Output is correct
4 Correct 85 ms 47616 KB Output is correct
5 Incorrect 22 ms 26052 KB Extra information in the output file
6 Halted 0 ms 0 KB -

Subtask #7
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 21 ms 25292 KB Output is correct
2 Correct 79 ms 35844 KB Output is correct
3 Correct 76 ms 36512 KB Output is correct

Subtask #8
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 21 ms 25292 KB Output is correct
2 Correct 79 ms 35844 KB Output is correct
3 Correct 76 ms 36512 KB Output is correct
4 Incorrect 22 ms 25288 KB Extra information in the output file
5 Halted 0 ms 0 KB -

Subtask #9
12.5 / 12.5

# 결과 실행 시간 메모리 Grader output
1 Correct 23 ms 25296 KB Output is correct
2 Correct 84 ms 44420 KB Output is correct
3 Correct 86 ms 47872 KB Output is correct
4 Correct 81 ms 47620 KB Output is correct
5 Correct 21 ms 26052 KB Output is correct
6 Correct 68 ms 39228 KB Output is correct
7 Correct 94 ms 39820 KB Output is correct
8 Correct 81 ms 40192 KB Output is correct
9 Correct 85 ms 40196 KB Output is correct
10 Correct 95 ms 44804 KB Output is correct
11 Correct 118 ms 44036 KB Output is correct

Subtask #10
0 / 12.5

# 결과 실행 시간 메모리 Grader output
1 Correct 23 ms 25296 KB Output is correct
2 Correct 84 ms 44420 KB Output is correct
3 Correct 86 ms 47872 KB Output is correct
4 Correct 81 ms 47620 KB Output is correct
5 Correct 21 ms 26052 KB Output is correct
6 Correct 68 ms 39228 KB Output is correct
7 Correct 94 ms 39820 KB Output is correct
8 Correct 81 ms 40192 KB Output is correct
9 Correct 85 ms 40196 KB Output is correct
10 Correct 95 ms 44804 KB Output is correct
11 Correct 118 ms 44036 KB Output is correct
12 Incorrect 20 ms 26056 KB Extra information in the output file
13 Halted 0 ms 0 KB -

Subtask #11
17.5 / 17.5

# 결과 실행 시간 메모리 Grader output
1 Correct 25 ms 25308 KB Output is correct
2 Correct 25 ms 25236 KB Output is correct
3 Correct 28 ms 25316 KB Output is correct
4 Correct 25 ms 25308 KB Output is correct
5 Correct 25 ms 25612 KB Output is correct
6 Correct 29 ms 25320 KB Output is correct
7 Correct 21 ms 25296 KB Output is correct
8 Correct 63 ms 35932 KB Output is correct
9 Correct 84 ms 35960 KB Output is correct
10 Correct 21 ms 25292 KB Output is correct
11 Correct 83 ms 44320 KB Output is correct
12 Correct 87 ms 47872 KB Output is correct
13 Correct 82 ms 47620 KB Output is correct
14 Correct 21 ms 26168 KB Output is correct
15 Correct 69 ms 39424 KB Output is correct
16 Correct 81 ms 39684 KB Output is correct
17 Correct 80 ms 40192 KB Output is correct
18 Correct 80 ms 40208 KB Output is correct
19 Correct 91 ms 44792 KB Output is correct
20 Correct 95 ms 43908 KB Output is correct
21 Correct 72 ms 39252 KB Output is correct
22 Correct 67 ms 39424 KB Output is correct
23 Correct 94 ms 39644 KB Output is correct
24 Correct 75 ms 40028 KB Output is correct
25 Correct 83 ms 41592 KB Output is correct
26 Correct 78 ms 39136 KB Output is correct
27 Correct 87 ms 39364 KB Output is correct

Subtask #12
0 / 17.5

# 결과 실행 시간 메모리 Grader output
1 Correct 25 ms 25308 KB Output is correct
2 Correct 25 ms 25236 KB Output is correct
3 Correct 28 ms 25316 KB Output is correct
4 Correct 25 ms 25308 KB Output is correct
5 Correct 25 ms 25612 KB Output is correct
6 Correct 29 ms 25320 KB Output is correct
7 Correct 21 ms 25296 KB Output is correct
8 Correct 63 ms 35932 KB Output is correct
9 Correct 84 ms 35960 KB Output is correct
10 Correct 21 ms 25292 KB Output is correct
11 Correct 83 ms 44320 KB Output is correct
12 Correct 87 ms 47872 KB Output is correct
13 Correct 82 ms 47620 KB Output is correct
14 Correct 21 ms 26168 KB Output is correct
15 Correct 69 ms 39424 KB Output is correct
16 Correct 81 ms 39684 KB Output is correct
17 Correct 80 ms 40192 KB Output is correct
18 Correct 80 ms 40208 KB Output is correct
19 Correct 91 ms 44792 KB Output is correct
20 Correct 95 ms 43908 KB Output is correct
21 Correct 72 ms 39252 KB Output is correct
22 Correct 67 ms 39424 KB Output is correct
23 Correct 94 ms 39644 KB Output is correct
24 Correct 75 ms 40028 KB Output is correct
25 Correct 83 ms 41592 KB Output is correct
26 Correct 78 ms 39136 KB Output is correct
27 Correct 87 ms 39364 KB Output is correct
28 Incorrect 31 ms 26064 KB Extra information in the output file
29 Halted 0 ms 0 KB -