oj.uz

답안 #570594

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
570594 2022-05-30T15:15:14 Z iancu 유괴 2 (JOI17_abduction2) C++14
44 / 100
 5000 ms 27960 KB 
#include <bits/stdc++.h>

#define NORTH 0
#define SOUTH 1
#define EAST  2
#define WEST  3

using namespace std;

const int N = 5e4 + 5;

struct Node {
  int x, y;
  int val;
  int dir;
  long long dist;

  bool operator<(const Node& n) const {
    return val > n.val;
    //return make_tuple(x, y, dir) < make_tuple(n.x, n.y, n.dir);
  }
};

struct Hasher
{
  long long operator() (const Node& n) const
  {
      return n.dir ^ n.val ^ n.x ^ n.y;
  }
};
struct EqualFn
{
  bool operator() (const Node& n1, const Node& n2) const
  {
    return (n1.x == n2.x) && (n1.y == n2.y) && (n1.val == n2.val) && (n1.dir == n2.dir);
  }
};
struct Hasher2
{
  size_t operator() (const pair<int, int>& v) const
  {
      size_t h = (size_t(v.first)<<32)+size_t(v.second);
      h*=1231231557ull; // "random" uneven integer
      h^=(h>>32);
      return h;
  }
};

int h, w;
int a[N], b[N];

long long solve(int x, int y, int dir) {
  unordered_map<Node, pair<int, int>, Hasher, EqualFn> nxt;
  unordered_map<pair<int, int>, long long, Hasher2> dp;
  int hl, hr, wl, wr;
  long long ans = 0;
  hl = hr = x;
  wl = wr = y;
  if (dir == 0) hl = max(hl - 1, 1);
  else if (dir == 1) hr = min(hr + 1, h);
  else if (dir == 2) wr = min(wr + 1, w);
  else wl = max(wl - 1, 1);
  priority_queue<Node> pq;
  pq.push({x, y, 0, dir, 0});
  while (!pq.empty()) {
    auto n = pq.top();
    //cout << n.x << " " << n.y << " " << n.dir << " " << n.dist << endl;
    pq.pop();
    ans = max(ans, n.dist);

    if (n.dir == NORTH && n.x == 1)
      continue;
    if (n.dir == SOUTH && n.x == h)
      continue;
    if (n.dir == EAST  && n.y == w)
      continue;
    if (n.dir == WEST  && n.y == 1)
      continue;

    if (n.dir == NORTH) {
      if (nxt.find(n) != nxt.end()) {
      } else {
          while (hl > 1 && a[hl] <= b[n.y])
            --hl;
          if (a[hl] <= b[n.y]) {
            ans = max(ans, n.dist + n.x - hl);
            continue;
          }
          nxt[n] = {hl, n.y};
      }
      if (dp[nxt[n]] >= n.dist + n.x - nxt[n].first)
        continue;
      dp[nxt[n]] = n.dist + n.x - nxt[n].first;
      pq.push({nxt[n].first, nxt[n].second, a[nxt[n].first], WEST, n.dist + n.x - nxt[n].first});
      pq.push({nxt[n].first, nxt[n].second, a[nxt[n].first], EAST, n.dist + n.x - nxt[n].first});
    } else if (n.dir == SOUTH) {
      if (nxt.find(n) == nxt.end()) {
        while (hr < h && a[hr] <= b[n.y])
          ++hr;
        if (a[hr] <= b[n.y]) {
          ans = max(ans, n.dist + hr - n.x);
          continue;
        }
        nxt[n] = {hr, n.y};
      }
      if (dp[nxt[n]] >= n.dist + nxt[n].first - n.x)
        continue;
      dp[nxt[n]] = n.dist + nxt[n].first - n.x;
      pq.push({nxt[n].first, nxt[n].second, a[nxt[n].first], WEST, n.dist + nxt[n].first - n.x});
      pq.push({nxt[n].first, nxt[n].second, a[nxt[n].first], EAST, n.dist + nxt[n].first - n.x});
    } else if (n.dir == EAST) {
      if (nxt.find(n) == nxt.end()) {
        while (wr < w && b[wr] <= a[n.x])
          ++wr;
        if (b[wr] <= a[n.x]) {
          ans = max(ans, n.dist + wr - n.y);
          continue;
        }
        nxt[n] = {n.x, wr};
      }
      if (dp[nxt[n]] >= n.dist + nxt[n].second - n.y)
        continue;
      dp[nxt[n]] = n.dist + nxt[n].second - n.y;
      pq.push({nxt[n].first, nxt[n].second, b[nxt[n].second], NORTH, n.dist + nxt[n].second - n.y});
      pq.push({nxt[n].first, nxt[n].second, b[nxt[n].second], SOUTH, n.dist + nxt[n].second - n.y});
    } else {
      if (nxt.find(n) == nxt.end()) {
        while (wl > 1 && b[wl] <= a[n.x])
          --wl;
        if (b[wl] <= a[n.x]) {
          ans = max(ans, n.dist + n.y - wl);
          continue;
        }
        nxt[n] = {n.x, wl};
      }
      if (dp[nxt[n]] >= n.dist + n.y - nxt[n].second)
        continue;
      dp[nxt[n]] = n.dist + n.y - nxt[n].second;
      pq.push({nxt[n].first, nxt[n].second, b[nxt[n].second], NORTH, n.dist + n.y - nxt[n].second});
      pq.push({nxt[n].first, nxt[n].second, b[nxt[n].second], SOUTH, n.dist + n.y - nxt[n].second});
    }
  }
  return ans;
}

int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr), cout.tie(nullptr);
  int q;
  cin >> h >> w >> q;
  for (int i = 1; i <= h; ++i)
    cin >> a[i];
  for (int i = 1; i <= w; ++i)
    cin >> b[i];
  while (q--) {
    int x, y;
    cin >> x >> y;
    long long ans = 0;
    for (int i = 0; i < 4; ++i)
      ans = max(ans, solve(x, y, i));
    cout << ans << "\n";
  }
  return 0;
}

Subtask #1
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 264 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 264 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 2 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 2 ms 340 KB Output is correct
19 Correct 12 ms 852 KB Output is correct
20 Correct 21 ms 1140 KB Output is correct
21 Correct 14 ms 992 KB Output is correct
22 Correct 34 ms 1584 KB Output is correct

Subtask #3
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 264 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 2 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 2 ms 340 KB Output is correct
19 Correct 12 ms 852 KB Output is correct
20 Correct 21 ms 1140 KB Output is correct
21 Correct 14 ms 992 KB Output is correct
22 Correct 34 ms 1584 KB Output is correct
23 Correct 11 ms 664 KB Output is correct
24 Correct 10 ms 724 KB Output is correct
25 Correct 10 ms 696 KB Output is correct
26 Correct 9 ms 724 KB Output is correct
27 Correct 10 ms 724 KB Output is correct
28 Correct 64 ms 5292 KB Output is correct
29 Correct 18 ms 1260 KB Output is correct
30 Correct 567 ms 15948 KB Output is correct
31 Correct 882 ms 23348 KB Output is correct
32 Correct 28 ms 1492 KB Output is correct
33 Correct 130 ms 5900 KB Output is correct

Subtask #4
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 340 KB Output is correct
2 Correct 10 ms 356 KB Output is correct
3 Correct 9 ms 340 KB Output is correct
4 Correct 10 ms 340 KB Output is correct
5 Correct 9 ms 340 KB Output is correct
6 Correct 96 ms 596 KB Output is correct
7 Correct 91 ms 560 KB Output is correct
8 Correct 791 ms 1628 KB Output is correct
9 Correct 848 ms 1596 KB Output is correct
10 Correct 886 ms 1592 KB Output is correct
11 Correct 1385 ms 1976 KB Output is correct

Subtask #5
0 / 56.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 264 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 2 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 2 ms 340 KB Output is correct
19 Correct 12 ms 852 KB Output is correct
20 Correct 21 ms 1140 KB Output is correct
21 Correct 14 ms 992 KB Output is correct
22 Correct 34 ms 1584 KB Output is correct
23 Correct 11 ms 664 KB Output is correct
24 Correct 10 ms 724 KB Output is correct
25 Correct 10 ms 696 KB Output is correct
26 Correct 9 ms 724 KB Output is correct
27 Correct 10 ms 724 KB Output is correct
28 Correct 64 ms 5292 KB Output is correct
29 Correct 18 ms 1260 KB Output is correct
30 Correct 567 ms 15948 KB Output is correct
31 Correct 882 ms 23348 KB Output is correct
32 Correct 28 ms 1492 KB Output is correct
33 Correct 130 ms 5900 KB Output is correct
34 Correct 10 ms 340 KB Output is correct
35 Correct 10 ms 356 KB Output is correct
36 Correct 9 ms 340 KB Output is correct
37 Correct 10 ms 340 KB Output is correct
38 Correct 9 ms 340 KB Output is correct
39 Correct 96 ms 596 KB Output is correct
40 Correct 91 ms 560 KB Output is correct
41 Correct 791 ms 1628 KB Output is correct
42 Correct 848 ms 1596 KB Output is correct
43 Correct 886 ms 1592 KB Output is correct
44 Correct 1385 ms 1976 KB Output is correct
45 Correct 32 ms 724 KB Output is correct
46 Correct 37 ms 656 KB Output is correct
47 Correct 43 ms 792 KB Output is correct
48 Correct 37 ms 724 KB Output is correct
49 Correct 41 ms 724 KB Output is correct
50 Correct 2567 ms 7436 KB Output is correct
51 Correct 2422 ms 7540 KB Output is correct
52 Execution timed out 5045 ms 27960 KB Time limit exceeded
53 Halted 0 ms 0 KB -