oj.uz

Submission #351595

# Submission time Handle Problem Language Result Execution time Memory
351595 2021-01-20T05:48:19 Z Noran File Paths (BOI15_fil) C++14
100 / 100
 313 ms 5612 KB 
#include <bits/stdc++.h>

#define SZ(AA) int((AA).size())

using namespace std;

const int MAXN = 6000, MAXK = 1000000;
vector<int> ve[MAXN + 10];
int N, M, K, S, h[MAXN + 10], cnt[MAXK + 10];
bool res[MAXN + 10], us[MAXK + 10];

void add(int v, int delta, int x) {
  if (v > N) {
    return;
  }
  int y = h[v] + delta;
  if (y <= MAXK) {
    cnt[y] += x;
  }
  for (int w : ve[v]) {
    add(w, delta, x);
  }
}

// use cycle
void case1(int v) {
  if (v > N) {
    int y = K - h[v];
    if (y > 0) {
      for (int d = 1; d * d <= y; ++d) {
        if (y % d == 0 && (cnt[d] > 0 || cnt[y / d] > 0)) {
          res[v] = true;
        }
      }
    }
    return;
  }
  add(v, S + 1 - h[v], 1);
  for (int w : ve[v]) {
    case1(w);
  }
  add(v, S + 1 - h[v], -1);
}

vector<int> anc;

// use single directory symlink
void case2(int v) {
  if (v > N) {
    for (int a : anc) {
      int y = K - (h[v] - h[a]) - (S + 1);
      if (y >= 0 && us[y]) {
        res[v] = true;
      }
    }
    return;
  }
  anc.push_back(v);
  for (int w : ve[v]) {
    case2(w);
  }
  anc.pop_back();
}

// do not use symlinks at all
void case3() {
  for (int i = N + 1; i <= N + M; ++i) {
    if (h[i] == K) {
      res[i] = true;
    }
  }
}

// use file symlink
void case4() {
  for (int i = 0; i <= N; ++i) {
    if (h[i] + S == K) {
      for (int j = N + 1; j <= N + M; ++j) {
        res[j] = true;
      }
      return;
    }
  }
}

int main(void) {
  scanf("%d%d%d%d", &N, &M, &K, &S);
  h[0] = 1; us[1] = true;
  for (int i = 1; i <= N + M; ++i) {
    int p; scanf("%d%d", &p, &h[i]);
    ve[p].push_back(i);
    h[i] += h[p] + (i <= N ? 1 : 0);
    if (i <= N) {
      us[h[i]] = true;
    }
  }
  case1(0);
  case2(0);
  case3();
  //case4();
  for (int i = N + 1; i <= N + M; ++i) {
    puts(res[i] ? "YES" : "NO");
  }
  return 0;
}

Compilation message

fil.cpp: In function 'int main()':
fil.cpp:88:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   88 |   scanf("%d%d%d%d", &N, &M, &K, &S);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
fil.cpp:91:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   91 |     int p; scanf("%d%d", &p, &h[i]);
      |            ~~~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 492 KB Output is correct
2 Correct 1 ms 492 KB Output is correct
3 Correct 2 ms 1004 KB Output is correct
4 Correct 4 ms 1004 KB Output is correct
5 Correct 8 ms 4716 KB Output is correct
6 Correct 5 ms 3308 KB Output is correct
7 Correct 11 ms 4588 KB Output is correct
8 Correct 5 ms 4332 KB Output is correct
9 Correct 5 ms 4460 KB Output is correct
10 Correct 1 ms 492 KB Output is correct
11 Correct 1 ms 492 KB Output is correct
12 Correct 4 ms 876 KB Output is correct

Subtask #2
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 5228 KB Output is correct
2 Correct 13 ms 5100 KB Output is correct
3 Correct 12 ms 5356 KB Output is correct
4 Correct 12 ms 5356 KB Output is correct
5 Correct 225 ms 5356 KB Output is correct
6 Correct 191 ms 5612 KB Output is correct
7 Correct 122 ms 5228 KB Output is correct
8 Correct 113 ms 5484 KB Output is correct
9 Correct 13 ms 4844 KB Output is correct
10 Correct 13 ms 4332 KB Output is correct
11 Correct 7 ms 748 KB Output is correct
12 Correct 176 ms 2540 KB Output is correct

Subtask #3
34.0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 492 KB Output is correct
2 Correct 1 ms 492 KB Output is correct
3 Correct 2 ms 1004 KB Output is correct
4 Correct 4 ms 1004 KB Output is correct
5 Correct 8 ms 4716 KB Output is correct
6 Correct 5 ms 3308 KB Output is correct
7 Correct 11 ms 4588 KB Output is correct
8 Correct 5 ms 4332 KB Output is correct
9 Correct 5 ms 4460 KB Output is correct
10 Correct 1 ms 492 KB Output is correct
11 Correct 1 ms 492 KB Output is correct
12 Correct 4 ms 876 KB Output is correct
13 Correct 13 ms 5228 KB Output is correct
14 Correct 13 ms 5100 KB Output is correct
15 Correct 12 ms 5356 KB Output is correct
16 Correct 12 ms 5356 KB Output is correct
17 Correct 225 ms 5356 KB Output is correct
18 Correct 191 ms 5612 KB Output is correct
19 Correct 122 ms 5228 KB Output is correct
20 Correct 113 ms 5484 KB Output is correct
21 Correct 13 ms 4844 KB Output is correct
22 Correct 13 ms 4332 KB Output is correct
23 Correct 7 ms 748 KB Output is correct
24 Correct 176 ms 2540 KB Output is correct
25 Correct 12 ms 4972 KB Output is correct
26 Correct 12 ms 5228 KB Output is correct
27 Correct 12 ms 5356 KB Output is correct
28 Correct 15 ms 5356 KB Output is correct
29 Correct 313 ms 5484 KB Output is correct
30 Correct 251 ms 5340 KB Output is correct
31 Correct 136 ms 5356 KB Output is correct
32 Correct 172 ms 5228 KB Output is correct
33 Correct 10 ms 4204 KB Output is correct
34 Correct 9 ms 4332 KB Output is correct
35 Correct 7 ms 748 KB Output is correct
36 Correct 210 ms 1644 KB Output is correct