oj.uz

Submission #572925

# Submission time Handle Problem Language Result Execution time Memory
572925 2022-06-05T13:46:56 Z iancu Abduction 2 (JOI17_abduction2) C++14
44 / 100
 5000 ms 1900 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 {
  unsigned short x, y;
  int val;
  char dir;
  int 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);
  }
};

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

vector<unsigned short> nxt0(N, 0);
vector<unsigned short> nxt1(N, 0);
vector<unsigned short> nxt2(N, 0);
vector<unsigned short> nxt3(N, 0);
vector<int> dp1sus(N, 0);
vector<int> dp1jos(N, 0);
vector<int> dp2st(N, 0);
vector<int> dp2dr(N, 0);

int solve(int x, int y, int dir) {
  fill(nxt0.begin(), nxt0.begin() + max(h, w) + 2, 0);
  fill(nxt1.begin(), nxt1.begin() + max(h, w) + 2, 0);
  fill(nxt2.begin(), nxt2.begin() + max(h, w) + 2, 0);
  fill(nxt3.begin(), nxt3.begin() + max(h, w) + 2, 0);
  fill(dp1sus.begin(), dp1sus.begin() + max(h, w) + 2, 0);
  fill(dp1jos.begin(), dp1jos.begin() + max(h, w) + 2, 0);
  fill(dp2st.begin(), dp2st.begin() + max(h, w) + 2, 0);
  fill(dp2dr.begin(), dp2dr.begin() + max(h, w) + 2, 0);
  int hl, hr, wl, wr;
  int 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 (nxt0[n.y] != 0) {
      } 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;
          }
          nxt0[n.y] = hl;
      }
      pair<int, int> urm = {nxt0[n.y], n.y};
      if (dp1sus[n.y] >= n.dist + n.x - urm.first)
        continue;
      dp1sus[n.y] = n.dist + n.x - urm.first;
      pq.push({urm.first, urm.second, a[urm.first], WEST, n.dist + n.x - urm.first});
      pq.push({urm.first, urm.second, a[urm.first], EAST, n.dist + n.x - urm.first});
    } else if (n.dir == SOUTH) {
      if (nxt1[n.y] == 0) {
        while (hr < h && a[hr] <= b[n.y])
          ++hr;
        if (a[hr] <= b[n.y]) {
          ans = max(ans, n.dist + hr - n.x);
          continue;
        }
        nxt1[n.y] = hr;
      }
      pair<int, int> urm = {nxt1[n.y], n.y};
      if (dp1jos[n.y] >= n.dist + urm.first - n.x)
        continue;
      dp1jos[n.y] = n.dist + urm.first - n.x;
      pq.push({urm.first, urm.second, a[urm.first], WEST, n.dist + urm.first - n.x});
      pq.push({urm.first, urm.second, a[urm.first], EAST, n.dist + urm.first - n.x});
    } else if (n.dir == EAST) {
      if (nxt2[n.x] == 0) {
        while (wr < w && b[wr] <= a[n.x])
          ++wr;
        if (b[wr] <= a[n.x]) {
          ans = max(ans, n.dist + wr - n.y);
          continue;
        }
        nxt2[n.x] = wr;
      }
      pair<int, int> urm = {n.x, nxt2[n.x]};
      if (dp2dr[n.x] >= n.dist + urm.second - n.y)
        continue;
      dp2dr[n.x] = n.dist + urm.second - n.y;
      pq.push({urm.first, urm.second, b[urm.second], NORTH, n.dist + urm.second - n.y});
      pq.push({urm.first, urm.second, b[urm.second], SOUTH, n.dist + urm.second - n.y});
    } else {
      if (nxt3[n.x] == 0) {
        while (wl > 1 && b[wl] <= a[n.x])
          --wl;
        if (b[wl] <= a[n.x]) {
          ans = max(ans, n.dist + n.y - wl);
          continue;
        }
        nxt3[n.x] = wl;
      }
      pair<int, int> urm = {n.x, nxt3[n.x]};
      if (dp2st[n.x] >= n.dist + n.y - urm.second)
        continue;
      dp2st[n.x] = n.dist + n.y - urm.second;
      pq.push({urm.first, urm.second, b[urm.second], NORTH, n.dist + n.y - urm.second});
      pq.push({urm.first, urm.second, b[urm.second], SOUTH, n.dist + n.y - urm.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;
    int ans = 0;
    for (int i = 0; i < 4; ++i)
      ans = max(ans, solve(x, y, i));
    cout << ans << "\n";
  }
  return 0;
}

Compilation message

abduction2.cpp: In function 'int solve(int, int, int)':
abduction2.cpp:54:12: warning: narrowing conversion of 'x' from 'int' to 'short unsigned int' [-Wnarrowing]
   54 |   pq.push({x, y, 0, dir, 0});
      |            ^
abduction2.cpp:54:15: warning: narrowing conversion of 'y' from 'int' to 'short unsigned int' [-Wnarrowing]
   54 |   pq.push({x, y, 0, dir, 0});
      |               ^
abduction2.cpp:54:21: warning: narrowing conversion of 'dir' from 'int' to 'char' [-Wnarrowing]
   54 |   pq.push({x, y, 0, dir, 0});
      |                     ^~~
abduction2.cpp:85:20: warning: narrowing conversion of 'urm.std::pair<int, int>::first' from 'int' to 'short unsigned int' [-Wnarrowing]
   85 |       pq.push({urm.first, urm.second, a[urm.first], WEST, n.dist + n.x - urm.first});
      |                ~~~~^~~~~
abduction2.cpp:85:31: warning: narrowing conversion of 'urm.std::pair<int, int>::second' from 'int' to 'short unsigned int' [-Wnarrowing]
   85 |       pq.push({urm.first, urm.second, a[urm.first], WEST, n.dist + n.x - urm.first});
      |                           ~~~~^~~~~~
abduction2.cpp:86:20: warning: narrowing conversion of 'urm.std::pair<int, int>::first' from 'int' to 'short unsigned int' [-Wnarrowing]
   86 |       pq.push({urm.first, urm.second, a[urm.first], EAST, n.dist + n.x - urm.first});
      |                ~~~~^~~~~
abduction2.cpp:86:31: warning: narrowing conversion of 'urm.std::pair<int, int>::second' from 'int' to 'short unsigned int' [-Wnarrowing]
   86 |       pq.push({urm.first, urm.second, a[urm.first], EAST, n.dist + n.x - urm.first});
      |                           ~~~~^~~~~~
abduction2.cpp:101:20: warning: narrowing conversion of 'urm.std::pair<int, int>::first' from 'int' to 'short unsigned int' [-Wnarrowing]
  101 |       pq.push({urm.first, urm.second, a[urm.first], WEST, n.dist + urm.first - n.x});
      |                ~~~~^~~~~
abduction2.cpp:101:31: warning: narrowing conversion of 'urm.std::pair<int, int>::second' from 'int' to 'short unsigned int' [-Wnarrowing]
  101 |       pq.push({urm.first, urm.second, a[urm.first], WEST, n.dist + urm.first - n.x});
      |                           ~~~~^~~~~~
abduction2.cpp:102:20: warning: narrowing conversion of 'urm.std::pair<int, int>::first' from 'int' to 'short unsigned int' [-Wnarrowing]
  102 |       pq.push({urm.first, urm.second, a[urm.first], EAST, n.dist + urm.first - n.x});
      |                ~~~~^~~~~
abduction2.cpp:102:31: warning: narrowing conversion of 'urm.std::pair<int, int>::second' from 'int' to 'short unsigned int' [-Wnarrowing]
  102 |       pq.push({urm.first, urm.second, a[urm.first], EAST, n.dist + urm.first - n.x});
      |                           ~~~~^~~~~~
abduction2.cpp:117:20: warning: narrowing conversion of 'urm.std::pair<int, int>::first' from 'int' to 'short unsigned int' [-Wnarrowing]
  117 |       pq.push({urm.first, urm.second, b[urm.second], NORTH, n.dist + urm.second - n.y});
      |                ~~~~^~~~~
abduction2.cpp:117:31: warning: narrowing conversion of 'urm.std::pair<int, int>::second' from 'int' to 'short unsigned int' [-Wnarrowing]
  117 |       pq.push({urm.first, urm.second, b[urm.second], NORTH, n.dist + urm.second - n.y});
      |                           ~~~~^~~~~~
abduction2.cpp:118:20: warning: narrowing conversion of 'urm.std::pair<int, int>::first' from 'int' to 'short unsigned int' [-Wnarrowing]
  118 |       pq.push({urm.first, urm.second, b[urm.second], SOUTH, n.dist + urm.second - n.y});
      |                ~~~~^~~~~
abduction2.cpp:118:31: warning: narrowing conversion of 'urm.std::pair<int, int>::second' from 'int' to 'short unsigned int' [-Wnarrowing]
  118 |       pq.push({urm.first, urm.second, b[urm.second], SOUTH, n.dist + urm.second - n.y});
      |                           ~~~~^~~~~~
abduction2.cpp:133:20: warning: narrowing conversion of 'urm.std::pair<int, int>::first' from 'int' to 'short unsigned int' [-Wnarrowing]
  133 |       pq.push({urm.first, urm.second, b[urm.second], NORTH, n.dist + n.y - urm.second});
      |                ~~~~^~~~~
abduction2.cpp:133:31: warning: narrowing conversion of 'urm.std::pair<int, int>::second' from 'int' to 'short unsigned int' [-Wnarrowing]
  133 |       pq.push({urm.first, urm.second, b[urm.second], NORTH, n.dist + n.y - urm.second});
      |                           ~~~~^~~~~~
abduction2.cpp:134:20: warning: narrowing conversion of 'urm.std::pair<int, int>::first' from 'int' to 'short unsigned int' [-Wnarrowing]
  134 |       pq.push({urm.first, urm.second, b[urm.second], SOUTH, n.dist + n.y - urm.second});
      |                ~~~~^~~~~
abduction2.cpp:134:31: warning: narrowing conversion of 'urm.std::pair<int, int>::second' from 'int' to 'short unsigned int' [-Wnarrowing]
  134 |       pq.push({urm.first, urm.second, b[urm.second], SOUTH, n.dist + n.y - urm.second});
      |                           ~~~~^~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1492 KB Output is correct
2 Correct 1 ms 1492 KB Output is correct
3 Correct 1 ms 1492 KB Output is correct
4 Correct 1 ms 1492 KB Output is correct
5 Correct 1 ms 1492 KB Output is correct
6 Correct 1 ms 1492 KB Output is correct
7 Correct 1 ms 1492 KB Output is correct
8 Correct 1 ms 1492 KB Output is correct
9 Correct 1 ms 1492 KB Output is correct
10 Correct 1 ms 1492 KB Output is correct
11 Correct 1 ms 1492 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1492 KB Output is correct
2 Correct 1 ms 1492 KB Output is correct
3 Correct 1 ms 1492 KB Output is correct
4 Correct 1 ms 1492 KB Output is correct
5 Correct 1 ms 1492 KB Output is correct
6 Correct 1 ms 1492 KB Output is correct
7 Correct 1 ms 1492 KB Output is correct
8 Correct 1 ms 1492 KB Output is correct
9 Correct 1 ms 1492 KB Output is correct
10 Correct 1 ms 1492 KB Output is correct
11 Correct 1 ms 1492 KB Output is correct
12 Correct 1 ms 1492 KB Output is correct
13 Correct 1 ms 1492 KB Output is correct
14 Correct 1 ms 1428 KB Output is correct
15 Correct 1 ms 1492 KB Output is correct
16 Correct 1 ms 1492 KB Output is correct
17 Correct 1 ms 1492 KB Output is correct
18 Correct 1 ms 1492 KB Output is correct
19 Correct 3 ms 1536 KB Output is correct
20 Correct 6 ms 1492 KB Output is correct
21 Correct 4 ms 1492 KB Output is correct
22 Correct 6 ms 1492 KB Output is correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1492 KB Output is correct
2 Correct 1 ms 1492 KB Output is correct
3 Correct 1 ms 1492 KB Output is correct
4 Correct 1 ms 1492 KB Output is correct
5 Correct 1 ms 1492 KB Output is correct
6 Correct 1 ms 1492 KB Output is correct
7 Correct 1 ms 1492 KB Output is correct
8 Correct 1 ms 1492 KB Output is correct
9 Correct 1 ms 1492 KB Output is correct
10 Correct 1 ms 1492 KB Output is correct
11 Correct 1 ms 1492 KB Output is correct
12 Correct 1 ms 1492 KB Output is correct
13 Correct 1 ms 1492 KB Output is correct
14 Correct 1 ms 1428 KB Output is correct
15 Correct 1 ms 1492 KB Output is correct
16 Correct 1 ms 1492 KB Output is correct
17 Correct 1 ms 1492 KB Output is correct
18 Correct 1 ms 1492 KB Output is correct
19 Correct 3 ms 1536 KB Output is correct
20 Correct 6 ms 1492 KB Output is correct
21 Correct 4 ms 1492 KB Output is correct
22 Correct 6 ms 1492 KB Output is correct
23 Correct 10 ms 1900 KB Output is correct
24 Correct 12 ms 1868 KB Output is correct
25 Correct 10 ms 1884 KB Output is correct
26 Correct 11 ms 1824 KB Output is correct
27 Correct 13 ms 1876 KB Output is correct
28 Correct 19 ms 1820 KB Output is correct
29 Correct 14 ms 1876 KB Output is correct
30 Correct 68 ms 1888 KB Output is correct
31 Correct 102 ms 1792 KB Output is correct
32 Correct 14 ms 1880 KB Output is correct
33 Correct 29 ms 1876 KB Output is correct

Subtask #4
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 1492 KB Output is correct
2 Correct 5 ms 1540 KB Output is correct
3 Correct 4 ms 1492 KB Output is correct
4 Correct 5 ms 1492 KB Output is correct
5 Correct 4 ms 1492 KB Output is correct
6 Correct 12 ms 1492 KB Output is correct
7 Correct 11 ms 1492 KB Output is correct
8 Correct 163 ms 1512 KB Output is correct
9 Correct 187 ms 1492 KB Output is correct
10 Correct 172 ms 1520 KB Output is correct
11 Correct 281 ms 1512 KB Output is correct

Subtask #5
0 / 56.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1492 KB Output is correct
2 Correct 1 ms 1492 KB Output is correct
3 Correct 1 ms 1492 KB Output is correct
4 Correct 1 ms 1492 KB Output is correct
5 Correct 1 ms 1492 KB Output is correct
6 Correct 1 ms 1492 KB Output is correct
7 Correct 1 ms 1492 KB Output is correct
8 Correct 1 ms 1492 KB Output is correct
9 Correct 1 ms 1492 KB Output is correct
10 Correct 1 ms 1492 KB Output is correct
11 Correct 1 ms 1492 KB Output is correct
12 Correct 1 ms 1492 KB Output is correct
13 Correct 1 ms 1492 KB Output is correct
14 Correct 1 ms 1428 KB Output is correct
15 Correct 1 ms 1492 KB Output is correct
16 Correct 1 ms 1492 KB Output is correct
17 Correct 1 ms 1492 KB Output is correct
18 Correct 1 ms 1492 KB Output is correct
19 Correct 3 ms 1536 KB Output is correct
20 Correct 6 ms 1492 KB Output is correct
21 Correct 4 ms 1492 KB Output is correct
22 Correct 6 ms 1492 KB Output is correct
23 Correct 10 ms 1900 KB Output is correct
24 Correct 12 ms 1868 KB Output is correct
25 Correct 10 ms 1884 KB Output is correct
26 Correct 11 ms 1824 KB Output is correct
27 Correct 13 ms 1876 KB Output is correct
28 Correct 19 ms 1820 KB Output is correct
29 Correct 14 ms 1876 KB Output is correct
30 Correct 68 ms 1888 KB Output is correct
31 Correct 102 ms 1792 KB Output is correct
32 Correct 14 ms 1880 KB Output is correct
33 Correct 29 ms 1876 KB Output is correct
34 Correct 5 ms 1492 KB Output is correct
35 Correct 5 ms 1540 KB Output is correct
36 Correct 4 ms 1492 KB Output is correct
37 Correct 5 ms 1492 KB Output is correct
38 Correct 4 ms 1492 KB Output is correct
39 Correct 12 ms 1492 KB Output is correct
40 Correct 11 ms 1492 KB Output is correct
41 Correct 163 ms 1512 KB Output is correct
42 Correct 187 ms 1492 KB Output is correct
43 Correct 172 ms 1520 KB Output is correct
44 Correct 281 ms 1512 KB Output is correct
45 Correct 39 ms 1876 KB Output is correct
46 Correct 39 ms 1796 KB Output is correct
47 Correct 44 ms 1816 KB Output is correct
48 Correct 45 ms 1888 KB Output is correct
49 Correct 45 ms 1876 KB Output is correct
50 Correct 278 ms 1884 KB Output is correct
51 Correct 240 ms 1884 KB Output is correct
52 Correct 3845 ms 1888 KB Output is correct
53 Correct 3848 ms 1892 KB Output is correct
54 Correct 3530 ms 1884 KB Output is correct
55 Execution timed out 5012 ms 1876 KB Time limit exceeded
56 Halted 0 ms 0 KB -