oj.uz

답안 #883222

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
883222 2023-12-04T19:49:20 Z MilosMilutinovic 유괴 2 (JOI17_abduction2) C++14
100 / 100
 4237 ms 31344 KB 
#include <bits/stdc++.h>
 
using namespace std;

const int MAX = 50005;
const int L = 18;

int h, w, q, a[MAX], b[MAX], logs[MAX];
int maxa[MAX][L], maxb[MAX][L];

unordered_map<int, bool> was[4];
unordered_map<int, long long> dp[4];

int MaxA(int L, int R) {
  int k = logs[R - L + 1];
  return max(maxa[L][k], maxa[R - (1 << k) + 1][k]);
}

int MaxB(int L, int R) {
  int k = logs[R - L + 1];
  return max(maxb[L][k], maxb[R - (1 << k) + 1][k]);
}

pair<int, int> Go(int x, int y, int dir) {
  if (dir == 0) {
    // up
    if (x == 0) {
      return make_pair(x, y);
    }
    x--;
    {
      if (MaxA(0, x) < b[y]) {
        return make_pair(0, y);
      }
      int low = 0, high = x, pos = x;
      while (low <= high) {
        int mid = low + high >> 1;
        if (MaxA(mid, x) >= b[y]) {
          pos = mid;
          low = mid + 1;
        } else {
          high = mid - 1;
        }
      }
      return make_pair(pos, y);
    }
    /* while (x > 0 && a[x] < b[y]) {
      x -= 1;
    }
    return make_pair(x, y); */
  }
  if (dir == 1) {
    // down
    if (x == h - 1) {
      return make_pair(x, y);
    }
    x += 1;
    {
      if (MaxA(x, h - 1) < b[y]) {
        return make_pair(h - 1, y);
      }
      int low = x, high = h - 1, pos = h - 1;
      while (low <= high) {
        int mid = low + high >> 1;
        if (MaxA(x, mid) >= b[y]) {
          pos = mid;
          high = mid - 1;
        } else {
          low = mid + 1;
        }
      }
      return make_pair(pos, y);
    } 
    /* while (x + 1 < h && a[x] < b[y]) {
      x += 1;
    }
    return make_pair(x, y); */
  }
  if (dir == 2) {
    // left
    if (y == 0) {
      return make_pair(x, y);
    }
    y -= 1;
    {
      if (MaxB(0, y) < a[x]) {
        return make_pair(x, 0);
      }
      int low = 0, high = y, pos = y;
      while (low <= high) {
        int mid = low + high >> 1;
        if (MaxB(mid, y) >= a[x]) {
          pos = mid;
          low = mid + 1;
        } else {
          high = mid - 1;
        }
      }
      return make_pair(x, pos);
    } 
    /* while (y > 0 && a[x] > b[y]) {
      y -= 1;
    }
    return make_pair(x, y); */
  }
  if (dir == 3) {
    // right
    if (y == w - 1) {
      return make_pair(x, y);
    }
    y += 1;
    {
      if (MaxB(y, w - 1) < a[x]) {
        return make_pair(x, w - 1);
      }
      int low = y, high = w - 1, pos = y;
      while (low <= high) {
        int mid = low + high >> 1;
        if (MaxB(y, mid) >= a[x]) {
          pos = mid;
          high = mid - 1;
        } else {
          low = mid + 1;
        }
      }
      return make_pair(x, pos);
    } 
    /* while (y + 1 < w && a[x] > b[y]) {
      y += 1;
    }
    return make_pair(x, y); */
  }
  assert(false);
  return make_pair(-1, -1);
}

long long Solve(int x, int y, int dir) {
  if (dir <= 1) {
    if (a[x] < b[y]) {
      return 0LL;
    }
  } else {
    if (a[x] > b[y]) {
      return 0LL;
    }
  }
  int curr = x * w + y;
  if (was[dir][curr]) {
    return dp[dir][curr];
  }
  was[dir][curr] = true;
  if (dir == 0 || dir == 1) {
    {
      pair<int, int> nxt = Go(x, y, 2);
      if (nxt.first != x || nxt.second != y) {
        dp[dir][curr] = max(dp[dir][curr], Solve(nxt.first, nxt.second, 2) + abs(nxt.first - x) + abs(nxt.second - y));
      }
    }
    {
      pair<int, int> nxt = Go(x, y, 3);
      if (nxt.first != x || nxt.second != y) {
        dp[dir][curr] = max(dp[dir][curr], Solve(nxt.first, nxt.second, 3) + abs(nxt.first - x) + abs(nxt.second - y));
      }
    }
  } 
  if (dir == 2 || dir == 3) {
    {
      pair<int, int> nxt = Go(x, y, 0);
      if (nxt.first != x || nxt.second != y) {
        dp[dir][curr] = max(dp[dir][curr], Solve(nxt.first, nxt.second, 0) + abs(nxt.first - x) + abs(nxt.second - y));
      }
    }
    {
      pair<int, int> nxt = Go(x, y, 1);
      if (nxt.first != x || nxt.second != y) {
        dp[dir][curr] = max(dp[dir][curr], Solve(nxt.first, nxt.second, 1) + abs(nxt.first - x) + abs(nxt.second - y));
      }
    }
  }
  return dp[dir][curr];
}
 
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  //int h, w, q;
  cin >> h >> w >> q;
  //vector<int> a(h);
  for (int i = 0; i < h; i++) {
    cin >> a[i];
  }
  //vector<int> b(w);
  for (int i = 0; i < w; i++) {
    cin >> b[i];
  }
  //const int L = 20;
  //vector<vector<int>> maxa(h, vector<int>(L));
  //vector<vector<int>> maxb(w, vector<int>(L));
  for (int i = 0; i < h; i++) {
    maxa[i][0] = a[i];
  }
  for (int i = 0; i < w; i++) {
    maxb[i][0] = b[i];
  }
  for (int j = 1; j < L; j++) {
    for (int i = 0; i + (1 << j) <= h; i++) {
      maxa[i][j] = max(maxa[i][j - 1], maxa[i + (1 << (j - 1))][j - 1]);
    }
  }
  for (int j = 1; j < L; j++) {
    for (int i = 0; i + (1 << j) <= w; i++) {
      maxb[i][j] = max(maxb[i][j - 1], maxb[i + (1 << (j - 1))][j - 1]);
    }
  }
  for (int i = 2; i <= max(h, w); i++) {
    logs[i] = logs[i >> 1] + 1;
  }
  while (q--) {
    int x, y;
    cin >> x >> y;
    --x; --y;
    long long res = 1;
    for (int dir = 0; dir < 4; dir++) {
      pair<int, int> cell = Go(x, y, dir);
      int nx = cell.first;
      int ny = cell.second;
      if (nx != x || ny != y) {
        res = max(res, Solve(nx, ny, dir) + abs(x - nx) + abs(y - ny));
      }
    }
    cout << res << '\n';
    for (int dir = 0; dir < 4; dir++) {
      was[dir].clear();
      dp[dir].clear();
    }
  }
  return 0;
}

Compilation message

abduction2.cpp: In function 'std::pair<int, int> Go(int, int, int)':
abduction2.cpp:37:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   37 |         int mid = low + high >> 1;
      |                   ~~~~^~~~~~
abduction2.cpp:64:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   64 |         int mid = low + high >> 1;
      |                   ~~~~^~~~~~
abduction2.cpp:91:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   91 |         int mid = low + high >> 1;
      |                   ~~~~^~~~~~
abduction2.cpp:118:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  118 |         int mid = low + high >> 1;
      |                   ~~~~^~~~~~

Subtask #1
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 0 ms 2392 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 0 ms 2392 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 0 ms 2392 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 0 ms 2392 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2652 KB Output is correct
13 Correct 1 ms 2652 KB Output is correct
14 Correct 1 ms 2652 KB Output is correct
15 Correct 1 ms 2652 KB Output is correct
16 Correct 1 ms 2648 KB Output is correct
17 Correct 1 ms 2652 KB Output is correct
18 Correct 1 ms 2652 KB Output is correct
19 Correct 2 ms 2908 KB Output is correct
20 Correct 2 ms 2908 KB Output is correct
21 Correct 2 ms 2908 KB Output is correct
22 Correct 3 ms 3240 KB Output is correct

Subtask #3
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 0 ms 2392 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 0 ms 2392 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2652 KB Output is correct
13 Correct 1 ms 2652 KB Output is correct
14 Correct 1 ms 2652 KB Output is correct
15 Correct 1 ms 2652 KB Output is correct
16 Correct 1 ms 2648 KB Output is correct
17 Correct 1 ms 2652 KB Output is correct
18 Correct 1 ms 2652 KB Output is correct
19 Correct 2 ms 2908 KB Output is correct
20 Correct 2 ms 2908 KB Output is correct
21 Correct 2 ms 2908 KB Output is correct
22 Correct 3 ms 3240 KB Output is correct
23 Correct 11 ms 8028 KB Output is correct
24 Correct 11 ms 8028 KB Output is correct
25 Correct 10 ms 8028 KB Output is correct
26 Correct 11 ms 8028 KB Output is correct
27 Correct 11 ms 7928 KB Output is correct
28 Correct 24 ms 14328 KB Output is correct
29 Correct 12 ms 8792 KB Output is correct
30 Correct 48 ms 15752 KB Output is correct
31 Correct 62 ms 19140 KB Output is correct
32 Correct 12 ms 8284 KB Output is correct
33 Correct 20 ms 10588 KB Output is correct

Subtask #4
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2652 KB Output is correct
2 Correct 2 ms 2652 KB Output is correct
3 Correct 2 ms 2652 KB Output is correct
4 Correct 2 ms 2652 KB Output is correct
5 Correct 2 ms 2648 KB Output is correct
6 Correct 11 ms 2908 KB Output is correct
7 Correct 11 ms 2908 KB Output is correct
8 Correct 49 ms 3124 KB Output is correct
9 Correct 49 ms 3164 KB Output is correct
10 Correct 54 ms 3152 KB Output is correct
11 Correct 74 ms 3416 KB Output is correct

Subtask #5
56.0 / 56.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 0 ms 2396 KB Output is correct
8 Correct 0 ms 2392 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 0 ms 2392 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2652 KB Output is correct
13 Correct 1 ms 2652 KB Output is correct
14 Correct 1 ms 2652 KB Output is correct
15 Correct 1 ms 2652 KB Output is correct
16 Correct 1 ms 2648 KB Output is correct
17 Correct 1 ms 2652 KB Output is correct
18 Correct 1 ms 2652 KB Output is correct
19 Correct 2 ms 2908 KB Output is correct
20 Correct 2 ms 2908 KB Output is correct
21 Correct 2 ms 2908 KB Output is correct
22 Correct 3 ms 3240 KB Output is correct
23 Correct 11 ms 8028 KB Output is correct
24 Correct 11 ms 8028 KB Output is correct
25 Correct 10 ms 8028 KB Output is correct
26 Correct 11 ms 8028 KB Output is correct
27 Correct 11 ms 7928 KB Output is correct
28 Correct 24 ms 14328 KB Output is correct
29 Correct 12 ms 8792 KB Output is correct
30 Correct 48 ms 15752 KB Output is correct
31 Correct 62 ms 19140 KB Output is correct
32 Correct 12 ms 8284 KB Output is correct
33 Correct 20 ms 10588 KB Output is correct
34 Correct 2 ms 2652 KB Output is correct
35 Correct 2 ms 2652 KB Output is correct
36 Correct 2 ms 2652 KB Output is correct
37 Correct 2 ms 2652 KB Output is correct
38 Correct 2 ms 2648 KB Output is correct
39 Correct 11 ms 2908 KB Output is correct
40 Correct 11 ms 2908 KB Output is correct
41 Correct 49 ms 3124 KB Output is correct
42 Correct 49 ms 3164 KB Output is correct
43 Correct 54 ms 3152 KB Output is correct
44 Correct 74 ms 3416 KB Output is correct
45 Correct 13 ms 8024 KB Output is correct
46 Correct 12 ms 8024 KB Output is correct
47 Correct 13 ms 8272 KB Output is correct
48 Correct 13 ms 8024 KB Output is correct
49 Correct 16 ms 8028 KB Output is correct
50 Correct 445 ms 17036 KB Output is correct
51 Correct 387 ms 17516 KB Output is correct
52 Correct 2757 ms 23212 KB Output is correct
53 Correct 2933 ms 22880 KB Output is correct
54 Correct 2491 ms 21920 KB Output is correct
55 Correct 4237 ms 31344 KB Output is correct
56 Correct 685 ms 10836 KB Output is correct
57 Correct 230 ms 10516 KB Output is correct
58 Correct 203 ms 10580 KB Output is correct
59 Correct 263 ms 10832 KB Output is correct