oj.uz

Submission #572934

# Submission time Handle Problem Language Result Execution time Memory
572934 2022-06-05T14:07:20 Z iancu Abduction 2 (JOI17_abduction2) C++14
40 / 100
 279 ms 1908 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});

  int pasi = 0;

  while (!pq.empty() && pasi < 8 * (w + h + 1)) {
      ++pasi;
    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:89:20: warning: narrowing conversion of 'urm.std::pair<int, int>::first' from 'int' to 'short unsigned int' [-Wnarrowing]
   89 |       pq.push({urm.first, urm.second, a[urm.first], WEST, n.dist + n.x - urm.first});
      |                ~~~~^~~~~
abduction2.cpp:89:31: warning: narrowing conversion of 'urm.std::pair<int, int>::second' from 'int' to 'short unsigned int' [-Wnarrowing]
   89 |       pq.push({urm.first, urm.second, a[urm.first], WEST, n.dist + n.x - urm.first});
      |                           ~~~~^~~~~~
abduction2.cpp:90:20: warning: narrowing conversion of 'urm.std::pair<int, int>::first' from 'int' to 'short unsigned int' [-Wnarrowing]
   90 |       pq.push({urm.first, urm.second, a[urm.first], EAST, n.dist + n.x - urm.first});
      |                ~~~~^~~~~
abduction2.cpp:90:31: warning: narrowing conversion of 'urm.std::pair<int, int>::second' from 'int' to 'short unsigned int' [-Wnarrowing]
   90 |       pq.push({urm.first, urm.second, a[urm.first], EAST, n.dist + n.x - urm.first});
      |                           ~~~~^~~~~~
abduction2.cpp:105:20: warning: narrowing conversion of 'urm.std::pair<int, int>::first' from 'int' to 'short unsigned int' [-Wnarrowing]
  105 |       pq.push({urm.first, urm.second, a[urm.first], WEST, n.dist + urm.first - n.x});
      |                ~~~~^~~~~
abduction2.cpp:105:31: warning: narrowing conversion of 'urm.std::pair<int, int>::second' from 'int' to 'short unsigned int' [-Wnarrowing]
  105 |       pq.push({urm.first, urm.second, a[urm.first], WEST, n.dist + urm.first - n.x});
      |                           ~~~~^~~~~~
abduction2.cpp:106:20: warning: narrowing conversion of 'urm.std::pair<int, int>::first' from 'int' to 'short unsigned int' [-Wnarrowing]
  106 |       pq.push({urm.first, urm.second, a[urm.first], EAST, n.dist + urm.first - n.x});
      |                ~~~~^~~~~
abduction2.cpp:106:31: warning: narrowing conversion of 'urm.std::pair<int, int>::second' from 'int' to 'short unsigned int' [-Wnarrowing]
  106 |       pq.push({urm.first, urm.second, a[urm.first], EAST, n.dist + urm.first - n.x});
      |                           ~~~~^~~~~~
abduction2.cpp:121:20: warning: narrowing conversion of 'urm.std::pair<int, int>::first' from 'int' to 'short unsigned int' [-Wnarrowing]
  121 |       pq.push({urm.first, urm.second, b[urm.second], NORTH, n.dist + urm.second - n.y});
      |                ~~~~^~~~~
abduction2.cpp:121:31: warning: narrowing conversion of 'urm.std::pair<int, int>::second' from 'int' to 'short unsigned int' [-Wnarrowing]
  121 |       pq.push({urm.first, urm.second, b[urm.second], NORTH, n.dist + urm.second - n.y});
      |                           ~~~~^~~~~~
abduction2.cpp:122:20: warning: narrowing conversion of 'urm.std::pair<int, int>::first' from 'int' to 'short unsigned int' [-Wnarrowing]
  122 |       pq.push({urm.first, urm.second, b[urm.second], SOUTH, n.dist + urm.second - n.y});
      |                ~~~~^~~~~
abduction2.cpp:122:31: warning: narrowing conversion of 'urm.std::pair<int, int>::second' from 'int' to 'short unsigned int' [-Wnarrowing]
  122 |       pq.push({urm.first, urm.second, b[urm.second], SOUTH, n.dist + urm.second - n.y});
      |                           ~~~~^~~~~~
abduction2.cpp:137:20: warning: narrowing conversion of 'urm.std::pair<int, int>::first' from 'int' to 'short unsigned int' [-Wnarrowing]
  137 |       pq.push({urm.first, urm.second, b[urm.second], NORTH, n.dist + n.y - urm.second});
      |                ~~~~^~~~~
abduction2.cpp:137:31: warning: narrowing conversion of 'urm.std::pair<int, int>::second' from 'int' to 'short unsigned int' [-Wnarrowing]
  137 |       pq.push({urm.first, urm.second, b[urm.second], NORTH, n.dist + n.y - urm.second});
      |                           ~~~~^~~~~~
abduction2.cpp:138:20: warning: narrowing conversion of 'urm.std::pair<int, int>::first' from 'int' to 'short unsigned int' [-Wnarrowing]
  138 |       pq.push({urm.first, urm.second, b[urm.second], SOUTH, n.dist + n.y - urm.second});
      |                ~~~~^~~~~
abduction2.cpp:138:31: warning: narrowing conversion of 'urm.std::pair<int, int>::second' from 'int' to 'short unsigned int' [-Wnarrowing]
  138 |       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 1508 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 2 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 1508 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 2 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 2 ms 1492 KB Output is correct
14 Correct 1 ms 1492 KB Output is correct
15 Correct 1 ms 1492 KB Output is correct
16 Correct 2 ms 1492 KB Output is correct
17 Correct 2 ms 1492 KB Output is correct
18 Correct 1 ms 1492 KB Output is correct
19 Correct 5 ms 1492 KB Output is correct
20 Correct 6 ms 1476 KB Output is correct
21 Correct 4 ms 1492 KB Output is correct
22 Correct 7 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 1508 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 2 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 2 ms 1492 KB Output is correct
14 Correct 1 ms 1492 KB Output is correct
15 Correct 1 ms 1492 KB Output is correct
16 Correct 2 ms 1492 KB Output is correct
17 Correct 2 ms 1492 KB Output is correct
18 Correct 1 ms 1492 KB Output is correct
19 Correct 5 ms 1492 KB Output is correct
20 Correct 6 ms 1476 KB Output is correct
21 Correct 4 ms 1492 KB Output is correct
22 Correct 7 ms 1492 KB Output is correct
23 Correct 10 ms 1876 KB Output is correct
24 Correct 13 ms 1772 KB Output is correct
25 Correct 11 ms 1856 KB Output is correct
26 Correct 12 ms 1836 KB Output is correct
27 Correct 14 ms 1808 KB Output is correct
28 Correct 16 ms 1876 KB Output is correct
29 Correct 11 ms 1892 KB Output is correct
30 Correct 75 ms 1904 KB Output is correct
31 Correct 85 ms 1896 KB Output is correct
32 Correct 13 ms 1908 KB Output is correct
33 Correct 34 ms 1792 KB Output is correct

Subtask #4
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 1492 KB Output is correct
2 Correct 6 ms 1492 KB Output is correct
3 Correct 4 ms 1492 KB Output is correct
4 Correct 4 ms 1492 KB Output is correct
5 Correct 4 ms 1492 KB Output is correct
6 Correct 14 ms 1532 KB Output is correct
7 Correct 12 ms 1492 KB Output is correct
8 Correct 152 ms 1544 KB Output is correct
9 Correct 161 ms 1492 KB Output is correct
10 Correct 199 ms 1524 KB Output is correct
11 Incorrect 279 ms 1492 KB Output isn't correct
12 Halted 0 ms 0 KB -

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 1508 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 2 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 2 ms 1492 KB Output is correct
14 Correct 1 ms 1492 KB Output is correct
15 Correct 1 ms 1492 KB Output is correct
16 Correct 2 ms 1492 KB Output is correct
17 Correct 2 ms 1492 KB Output is correct
18 Correct 1 ms 1492 KB Output is correct
19 Correct 5 ms 1492 KB Output is correct
20 Correct 6 ms 1476 KB Output is correct
21 Correct 4 ms 1492 KB Output is correct
22 Correct 7 ms 1492 KB Output is correct
23 Correct 10 ms 1876 KB Output is correct
24 Correct 13 ms 1772 KB Output is correct
25 Correct 11 ms 1856 KB Output is correct
26 Correct 12 ms 1836 KB Output is correct
27 Correct 14 ms 1808 KB Output is correct
28 Correct 16 ms 1876 KB Output is correct
29 Correct 11 ms 1892 KB Output is correct
30 Correct 75 ms 1904 KB Output is correct
31 Correct 85 ms 1896 KB Output is correct
32 Correct 13 ms 1908 KB Output is correct
33 Correct 34 ms 1792 KB Output is correct
34 Correct 4 ms 1492 KB Output is correct
35 Correct 6 ms 1492 KB Output is correct
36 Correct 4 ms 1492 KB Output is correct
37 Correct 4 ms 1492 KB Output is correct
38 Correct 4 ms 1492 KB Output is correct
39 Correct 14 ms 1532 KB Output is correct
40 Correct 12 ms 1492 KB Output is correct
41 Correct 152 ms 1544 KB Output is correct
42 Correct 161 ms 1492 KB Output is correct
43 Correct 199 ms 1524 KB Output is correct
44 Incorrect 279 ms 1492 KB Output isn't correct
45 Halted 0 ms 0 KB -