oj.uz

Submission #310047

# Submission time Handle Problem Language Result Execution time Memory
310047 2020-10-05T11:32:00 Z soroush File Paths (BOI15_fil) C++14
100 / 100
 205 ms 5632 KB 
// Adam Karczmarz

#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:89:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   89 |   scanf("%d%d%d%d", &N, &M, &K, &S);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
fil.cpp:92:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   92 |     int p; scanf("%d%d", &p, &h[i]);
      |            ~~~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 512 KB Output is correct
2 Correct 1 ms 512 KB Output is correct
3 Correct 2 ms 1024 KB Output is correct
4 Correct 4 ms 1024 KB Output is correct
5 Correct 6 ms 4608 KB Output is correct
6 Correct 5 ms 3328 KB Output is correct
7 Correct 11 ms 4608 KB Output is correct
8 Correct 4 ms 4224 KB Output is correct
9 Correct 4 ms 4352 KB Output is correct
10 Correct 1 ms 512 KB Output is correct
11 Correct 2 ms 512 KB Output is correct
12 Correct 4 ms 896 KB Output is correct

Subtask #2
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 5248 KB Output is correct
2 Correct 13 ms 5248 KB Output is correct
3 Correct 13 ms 5376 KB Output is correct
4 Correct 12 ms 5248 KB Output is correct
5 Correct 187 ms 5336 KB Output is correct
6 Correct 181 ms 5632 KB Output is correct
7 Correct 121 ms 5240 KB Output is correct
8 Correct 112 ms 5504 KB Output is correct
9 Correct 14 ms 4864 KB Output is correct
10 Correct 11 ms 4224 KB Output is correct
11 Correct 7 ms 768 KB Output is correct
12 Correct 158 ms 2432 KB Output is correct

Subtask #3
34.0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 512 KB Output is correct
2 Correct 1 ms 512 KB Output is correct
3 Correct 2 ms 1024 KB Output is correct
4 Correct 4 ms 1024 KB Output is correct
5 Correct 6 ms 4608 KB Output is correct
6 Correct 5 ms 3328 KB Output is correct
7 Correct 11 ms 4608 KB Output is correct
8 Correct 4 ms 4224 KB Output is correct
9 Correct 4 ms 4352 KB Output is correct
10 Correct 1 ms 512 KB Output is correct
11 Correct 2 ms 512 KB Output is correct
12 Correct 4 ms 896 KB Output is correct
13 Correct 14 ms 5248 KB Output is correct
14 Correct 13 ms 5248 KB Output is correct
15 Correct 13 ms 5376 KB Output is correct
16 Correct 12 ms 5248 KB Output is correct
17 Correct 187 ms 5336 KB Output is correct
18 Correct 181 ms 5632 KB Output is correct
19 Correct 121 ms 5240 KB Output is correct
20 Correct 112 ms 5504 KB Output is correct
21 Correct 14 ms 4864 KB Output is correct
22 Correct 11 ms 4224 KB Output is correct
23 Correct 7 ms 768 KB Output is correct
24 Correct 158 ms 2432 KB Output is correct
25 Correct 13 ms 4992 KB Output is correct
26 Correct 11 ms 5120 KB Output is correct
27 Correct 12 ms 5120 KB Output is correct
28 Correct 12 ms 5376 KB Output is correct
29 Correct 190 ms 5504 KB Output is correct
30 Correct 194 ms 5368 KB Output is correct
31 Correct 113 ms 5368 KB Output is correct
32 Correct 109 ms 5248 KB Output is correct
33 Correct 11 ms 4224 KB Output is correct
34 Correct 10 ms 4352 KB Output is correct
35 Correct 7 ms 768 KB Output is correct
36 Correct 205 ms 1536 KB Output is correct