Submission #1046357

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1046357	2024-08-06T13:28:11 Z	sleepntsheep	File Paths (BOI15_fil)	C	0 / 100	73 ms	4444 KB

fil

#include <stdio.h>
#include <stdlib.h>
#include <assert.h>

#define N 6005
#define A 4000005

void pus(int **eh, int *eo, int i, int j) {
  int o = eo[i]++;
  if (!o) eh[i] = (int*)malloc(sizeof **eh * 2);
  else if (0 == (o & o - 1)) eh[i] = (int*)realloc(eh[i], 2 * o * sizeof **eh);
  eh[i][o] = j;
}

int ft[N];
void add(int p, int k) {
  for (; p < N; p |= p + 1) ft[p] += k;
}
int sum(int p) {
  int z = 0;
  for (++p; p > 0; p &= p - 1) z += ft[p - 1];
  return z;
}

int n_, s, n, m, k, m_, par[N], *eh[N], eo[N], dep[N],
    ans[N], tin[N], tout[N], timer, *ph[A], po[A], *qh[A], qo[A], freq[A];

void dfs(int u) {
  tin[u] = timer++;
  if (dep[u] > k) dep[u] = k + 1;
  for (int j = 0; j < eo[u]; j += 2) {
    int v = eh[u][j], l = eh[u][j+1];
    dep[v] = l + dep[u];
    dfs(v);
  }
  tout[u] = timer;
}

int main(void) {
  scanf("%d%d%d%d", &n_, &m_, &k, &s);
  n = n_ + m_;
  ++s;

  for (int p, l, i = 1; i <= n; ++i) {
    scanf("%d%d", &p, &l);
    pus(eh, eo, par[i] = p, i);
    pus(eh, eo, p, l + 1);
  }

  dfs(0);

  for (int i = n_ + 1; i <= n; ++i) {

    if (dep[i] == k)
      ans[i] = 1;

    ++freq[dep[i]];
    for (int cur = i; cur != 0; cur = par[cur])
      if (cur <= n_)
        ++freq[dep[i]-dep[cur]];

    for (int j = 0; j <= n_; ++j)
      ans[i] |= freq[k - s - dep[j]];

    --freq[dep[i]];
    for (int cur = i; cur != 0; cur = par[cur])
      if (cur <= n_)
        --freq[dep[i]-dep[cur]];

    if (k > dep[i])
      pus(ph, po, k - dep[i], i);
  }

  /* many symlink uses */
  for (int i = 0; i <= n_; ++i)
    for (int j = 0; j <= n_; ++j)
      if (tin[i] <= tin[j] && tout[j] <= tout[i] && s + dep[j] - dep[i] < A)
        pus(qh, qo, s + dep[j] - dep[i], j);

  for (int l = 1; l < A; ++l) {
    for (int del = 1; del >= -1; del -= 2) {
      for (int low, j = 0; j < qo[l]; ++j) {
        low = qh[l][j];
        add(tin[low], del);
        add(tout[low], -del);
      }

      if (del == 1) {
        for (int ll = l; ll < A; ll += l)
          for (int j = 0; j < po[ll]; ++j)
            if (sum(tin[ph[ll][j]]) > 0)
              ans[ph[ll][j]] = 1;
      }
    }
  }

  for (int i = n_ + 1; i <= n; ++i)
    puts(ans[i] ? "YES": "NO");
}

Compilation message

fil.c: In function 'pus':
fil.c:11:24: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   11 |   else if (0 == (o & o - 1)) eh[i] = (int*)realloc(eh[i], 2 * o * sizeof **eh);
      |                      ~~^~~
fil.c: In function 'main':
fil.c:40:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |   scanf("%d%d%d%d", &n_, &m_, &k, &s);
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fil.c:45:5: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |     scanf("%d%d", &p, &l);
      |     ^~~~~~~~~~~~~~~~~~~~~

Subtask #1

0 / 33.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	73 ms	4444 KB	Output isn't correct
2	Halted	0 ms	0 KB	-

Subtask #2

0 / 33.0

#	Verdict	Execution time	Memory	Grader output
1	Runtime error	3 ms	860 KB	Execution killed with signal 11
2	Halted	0 ms	0 KB	-

Subtask #3

0 / 34.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	73 ms	4444 KB	Output isn't correct
2	Halted	0 ms	0 KB	-