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Submission #24256

# Submission time Handle Problem Language Result Execution time Memory
24256 2017-06-03T12:18:38 Z jiaqiyang Cultivation (JOI17_cultivation) C++14
80 / 100
 2000 ms 6704 KB 
#include <cstdio>
#include <climits>
#include <vector>
#include <algorithm>

typedef long long i64;

const int N = 300 + 10;

i64 r, c;
int n;

struct Point {
  i64 x, y;
  Point() {}
  Point(i64 _x, i64 _y): x(_x), y(_y) {}
  inline bool operator< (const Point &rhs) const {
    return x < rhs.x || (x == rhs.x && y < rhs.y);
  }
} p[N];

struct Info {
  i64 a, b, c;
  Info() { a = b = c = 0; }
  Info(i64 _a, i64 _b, i64 _c): a(_a), b(_b), c(_c) {}
} f[N][N];

void init(int l) {
  static i64 cur[N];
  int tot = 0;
  for (int r = l; r <= n; ++r) {
    int k = std::lower_bound(cur, cur + tot, p[r].y) - cur;
    cur[tot] = p[r].y;
    std::rotate(cur + k, cur + tot, cur + tot + 1);
    f[l][r].a = cur[0] - 1;
    f[l][r].b = c - cur[tot++];
    for (int i = 1; i < tot; ++i) f[l][r].c = std::max(f[l][r].c, cur[i] - cur[i - 1] - 1);
  }
}

class Queue {
  std::pair<int, i64> q[4 * N];
  int f, r;
 public:
  void clear() {
    f = 1;
    r = 0;
  }
  void trim(int s) {
    while (f <= r && q[f].first < s) ++f;
  }
  void push(int x, i64 y) {
    while (f <= r && q[r].second <= y) --r;
    q[++r] = std::make_pair(x, y);
  }
  inline i64 front() const { return q[f].second; }
};

i64 solve(int len) {
  i64 res = INT_MAX;
  static Info info[4 * N];
  static i64 pool[4 * N], temp[4 * N];
  for (int i = 1; i <= n; ++i) {
    pool[i] = p[i].x;
    pool[i + n] = p[i].x + len;
    pool[i + 2 * n] = p[i].x + len + 1;
    pool[i + 3 * n] = p[i].x + r - 1;
  }
  std::merge(pool + 1, pool + n + 1, pool + n + 1, pool + 2 * n + 1, temp + 1);
  std::merge(pool + 2 * n + 1, pool + 3 * n + 1, pool + 3 * n + 1, pool + 4 * n + 1, temp + 2 * n + 1);
  std::merge(temp + 1, temp + 2 * n + 1, temp + 2 * n + 1, temp + 4 * n + 1, pool + 1);
  int tot = std::unique(pool + 1, pool + 4 * n + 1) - pool - 1;
  for (int i = 1, l = 1, r = 1; i <= tot; ++i) {
    while (l <= n && !(p[l].x <= pool[i] && pool[i] <= p[l].x + len)) ++l;
    for (r = std::max(l, r); r <= n && p[r].x <= pool[i] && pool[i] <= p[r].x + len;) ++r;
    info[i] = (l > n ? Info(INT_MAX, INT_MAX, INT_MAX) : f[l][r - 1]);
  }
  static Queue q[3];
  q[0].clear(), q[1].clear(), q[2].clear();
  for (int i = 1, j = 1; i <= tot; ++i) {
    i64 s = pool[i];
    q[0].trim(i), q[1].trim(i), q[2].trim(i);
    for (; j <= tot && pool[j] <= s + r - 1; ++j) q[0].push(j, info[j].a), q[1].push(j, info[j].b), q[2].push(j, info[j].c);
    res = std::min(res, std::max(q[0].front() + q[1].front(), q[2].front()));
  }
  return res;
}

int main() {
  scanf("%lld%lld%d", &r, &c, &n);
  for (int i = 1; i <= n; ++i) scanf("%lld%lld", &p[i].x, &p[i].y);
  std::sort(p + 1, p + n + 1);
  std::vector<i64> cur;
  for (int i = 1; i <= n; ++i) init(i);
  for (int i = 1; i <= n; ++i)
    for (int j = 1; j < i; ++j)
      cur.push_back(std::max(p[i].x - p[j].x - 1, 0LL));
  for (int i = 1; i <= n; ++i)
    for (int j = 1; j <= n; ++j)
      cur.push_back(p[i].x - 1 + r - p[j].x);
  for (int i = 1; i <= n; ++i) cur.push_back(p[i].x - 1), cur.push_back(r - p[i].x);
  cur.push_back(0);
  std::sort(cur.begin(), cur.end());
  cur.erase(std::unique(cur.begin(), cur.end()), cur.end());
  i64 ans = INT_MAX;
  for (int i = 0; i < cur.size(); ++i) ans = std::min(ans, cur[i] + solve(cur[i]));
  printf("%lld\n", ans);
  return 0;
}

Compilation message

cultivation.cpp: In function 'int main()':
cultivation.cpp:106:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i = 0; i < cur.size(); ++i) ans = std::min(ans, cur[i] + solve(cur[i]));
                     ^
cultivation.cpp:90:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld%lld%d", &r, &c, &n);
                                  ^
cultivation.cpp:91:67: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   for (int i = 1; i <= n; ++i) scanf("%lld%lld", &p[i].x, &p[i].y);
                                                                   ^

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 3548 KB Output is correct
2 Correct 0 ms 3548 KB Output is correct
3 Correct 0 ms 3548 KB Output is correct
4 Correct 0 ms 3548 KB Output is correct
5 Correct 0 ms 3548 KB Output is correct
6 Correct 0 ms 3548 KB Output is correct
7 Correct 0 ms 3548 KB Output is correct
8 Correct 0 ms 3548 KB Output is correct
9 Correct 0 ms 3548 KB Output is correct
10 Correct 0 ms 3548 KB Output is correct
11 Correct 0 ms 3548 KB Output is correct
12 Correct 0 ms 3548 KB Output is correct
13 Correct 0 ms 3548 KB Output is correct
14 Correct 0 ms 3548 KB Output is correct
15 Correct 0 ms 3548 KB Output is correct
16 Correct 0 ms 3548 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 3548 KB Output is correct
2 Correct 0 ms 3548 KB Output is correct
3 Correct 0 ms 3548 KB Output is correct
4 Correct 0 ms 3548 KB Output is correct
5 Correct 0 ms 3548 KB Output is correct
6 Correct 0 ms 3548 KB Output is correct
7 Correct 0 ms 3548 KB Output is correct
8 Correct 0 ms 3548 KB Output is correct
9 Correct 0 ms 3548 KB Output is correct
10 Correct 0 ms 3548 KB Output is correct
11 Correct 0 ms 3548 KB Output is correct
12 Correct 0 ms 3548 KB Output is correct
13 Correct 0 ms 3548 KB Output is correct
14 Correct 0 ms 3548 KB Output is correct
15 Correct 0 ms 3548 KB Output is correct
16 Correct 0 ms 3548 KB Output is correct
17 Correct 0 ms 3548 KB Output is correct
18 Correct 0 ms 3688 KB Output is correct
19 Correct 0 ms 3548 KB Output is correct
20 Correct 0 ms 3548 KB Output is correct
21 Correct 0 ms 3688 KB Output is correct
22 Correct 0 ms 4016 KB Output is correct
23 Correct 0 ms 3548 KB Output is correct
24 Correct 6 ms 4400 KB Output is correct
25 Correct 3 ms 4400 KB Output is correct
26 Correct 13 ms 6704 KB Output is correct
27 Correct 23 ms 6704 KB Output is correct
28 Correct 6 ms 4400 KB Output is correct
29 Correct 13 ms 6704 KB Output is correct
30 Correct 16 ms 6704 KB Output is correct
31 Correct 16 ms 6704 KB Output is correct
32 Correct 16 ms 6704 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 3548 KB Output is correct
2 Correct 0 ms 3548 KB Output is correct
3 Correct 0 ms 3548 KB Output is correct
4 Correct 0 ms 3548 KB Output is correct
5 Correct 0 ms 3548 KB Output is correct
6 Correct 0 ms 3548 KB Output is correct
7 Correct 0 ms 3548 KB Output is correct
8 Correct 0 ms 3548 KB Output is correct
9 Correct 0 ms 3548 KB Output is correct
10 Correct 0 ms 3548 KB Output is correct
11 Correct 0 ms 3548 KB Output is correct
12 Correct 0 ms 3548 KB Output is correct
13 Correct 0 ms 3548 KB Output is correct
14 Correct 0 ms 3548 KB Output is correct
15 Correct 0 ms 3548 KB Output is correct
16 Correct 0 ms 3548 KB Output is correct
17 Correct 0 ms 3548 KB Output is correct
18 Correct 0 ms 3688 KB Output is correct
19 Correct 0 ms 3548 KB Output is correct
20 Correct 0 ms 3548 KB Output is correct
21 Correct 0 ms 3688 KB Output is correct
22 Correct 0 ms 4016 KB Output is correct
23 Correct 0 ms 3548 KB Output is correct
24 Correct 6 ms 4400 KB Output is correct
25 Correct 3 ms 4400 KB Output is correct
26 Correct 13 ms 6704 KB Output is correct
27 Correct 23 ms 6704 KB Output is correct
28 Correct 6 ms 4400 KB Output is correct
29 Correct 13 ms 6704 KB Output is correct
30 Correct 16 ms 6704 KB Output is correct
31 Correct 16 ms 6704 KB Output is correct
32 Correct 16 ms 6704 KB Output is correct
33 Correct 6 ms 6704 KB Output is correct
34 Correct 16 ms 6704 KB Output is correct
35 Correct 13 ms 6704 KB Output is correct
36 Correct 16 ms 6704 KB Output is correct
37 Correct 23 ms 6704 KB Output is correct
38 Correct 16 ms 6704 KB Output is correct
39 Correct 16 ms 6704 KB Output is correct
40 Correct 9 ms 6704 KB Output is correct
41 Correct 19 ms 6704 KB Output is correct
42 Correct 9 ms 6704 KB Output is correct
43 Correct 13 ms 6704 KB Output is correct
44 Correct 16 ms 6704 KB Output is correct

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 3548 KB Output is correct
2 Correct 3 ms 3548 KB Output is correct
3 Correct 3 ms 3548 KB Output is correct
4 Correct 3 ms 3548 KB Output is correct
5 Correct 6 ms 3548 KB Output is correct
6 Correct 3 ms 3548 KB Output is correct
7 Correct 0 ms 3548 KB Output is correct
8 Correct 3 ms 3548 KB Output is correct
9 Correct 3 ms 3548 KB Output is correct
10 Correct 0 ms 3548 KB Output is correct
11 Correct 3 ms 3548 KB Output is correct
12 Correct 6 ms 3548 KB Output is correct
13 Correct 0 ms 3548 KB Output is correct
14 Correct 0 ms 3548 KB Output is correct
15 Correct 3 ms 3548 KB Output is correct
16 Correct 3 ms 3548 KB Output is correct
17 Correct 3 ms 3548 KB Output is correct
18 Correct 3 ms 3548 KB Output is correct
19 Correct 3 ms 3548 KB Output is correct
20 Correct 3 ms 3548 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 3548 KB Output is correct
2 Correct 3 ms 3548 KB Output is correct
3 Correct 3 ms 3548 KB Output is correct
4 Correct 3 ms 3548 KB Output is correct
5 Correct 6 ms 3548 KB Output is correct
6 Correct 3 ms 3548 KB Output is correct
7 Correct 0 ms 3548 KB Output is correct
8 Correct 3 ms 3548 KB Output is correct
9 Correct 3 ms 3548 KB Output is correct
10 Correct 0 ms 3548 KB Output is correct
11 Correct 3 ms 3548 KB Output is correct
12 Correct 6 ms 3548 KB Output is correct
13 Correct 0 ms 3548 KB Output is correct
14 Correct 0 ms 3548 KB Output is correct
15 Correct 3 ms 3548 KB Output is correct
16 Correct 3 ms 3548 KB Output is correct
17 Correct 3 ms 3548 KB Output is correct
18 Correct 3 ms 3548 KB Output is correct
19 Correct 3 ms 3548 KB Output is correct
20 Correct 3 ms 3548 KB Output is correct
21 Correct 113 ms 3820 KB Output is correct
22 Correct 196 ms 3820 KB Output is correct
23 Correct 199 ms 3820 KB Output is correct
24 Correct 176 ms 3820 KB Output is correct
25 Correct 193 ms 3820 KB Output is correct
26 Correct 63 ms 3820 KB Output is correct
27 Correct 196 ms 3820 KB Output is correct
28 Correct 223 ms 3820 KB Output is correct
29 Correct 173 ms 3820 KB Output is correct
30 Correct 176 ms 3820 KB Output is correct
31 Correct 183 ms 3820 KB Output is correct
32 Correct 216 ms 3820 KB Output is correct
33 Correct 216 ms 3820 KB Output is correct
34 Correct 186 ms 3820 KB Output is correct
35 Correct 186 ms 3820 KB Output is correct
36 Correct 166 ms 3820 KB Output is correct

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 3548 KB Output is correct
2 Correct 0 ms 3548 KB Output is correct
3 Correct 0 ms 3548 KB Output is correct
4 Correct 0 ms 3548 KB Output is correct
5 Correct 0 ms 3548 KB Output is correct
6 Correct 0 ms 3548 KB Output is correct
7 Correct 0 ms 3548 KB Output is correct
8 Correct 0 ms 3548 KB Output is correct
9 Correct 0 ms 3548 KB Output is correct
10 Correct 0 ms 3548 KB Output is correct
11 Correct 0 ms 3548 KB Output is correct
12 Correct 0 ms 3548 KB Output is correct
13 Correct 0 ms 3548 KB Output is correct
14 Correct 0 ms 3548 KB Output is correct
15 Correct 0 ms 3548 KB Output is correct
16 Correct 0 ms 3548 KB Output is correct
17 Correct 0 ms 3548 KB Output is correct
18 Correct 0 ms 3688 KB Output is correct
19 Correct 0 ms 3548 KB Output is correct
20 Correct 0 ms 3548 KB Output is correct
21 Correct 0 ms 3688 KB Output is correct
22 Correct 0 ms 4016 KB Output is correct
23 Correct 0 ms 3548 KB Output is correct
24 Correct 6 ms 4400 KB Output is correct
25 Correct 3 ms 4400 KB Output is correct
26 Correct 13 ms 6704 KB Output is correct
27 Correct 23 ms 6704 KB Output is correct
28 Correct 6 ms 4400 KB Output is correct
29 Correct 13 ms 6704 KB Output is correct
30 Correct 16 ms 6704 KB Output is correct
31 Correct 16 ms 6704 KB Output is correct
32 Correct 16 ms 6704 KB Output is correct
33 Correct 6 ms 6704 KB Output is correct
34 Correct 16 ms 6704 KB Output is correct
35 Correct 13 ms 6704 KB Output is correct
36 Correct 16 ms 6704 KB Output is correct
37 Correct 23 ms 6704 KB Output is correct
38 Correct 16 ms 6704 KB Output is correct
39 Correct 16 ms 6704 KB Output is correct
40 Correct 9 ms 6704 KB Output is correct
41 Correct 19 ms 6704 KB Output is correct
42 Correct 9 ms 6704 KB Output is correct
43 Correct 13 ms 6704 KB Output is correct
44 Correct 16 ms 6704 KB Output is correct
45 Correct 3 ms 3548 KB Output is correct
46 Correct 3 ms 3548 KB Output is correct
47 Correct 3 ms 3548 KB Output is correct
48 Correct 3 ms 3548 KB Output is correct
49 Correct 6 ms 3548 KB Output is correct
50 Correct 3 ms 3548 KB Output is correct
51 Correct 0 ms 3548 KB Output is correct
52 Correct 3 ms 3548 KB Output is correct
53 Correct 3 ms 3548 KB Output is correct
54 Correct 0 ms 3548 KB Output is correct
55 Correct 3 ms 3548 KB Output is correct
56 Correct 6 ms 3548 KB Output is correct
57 Correct 0 ms 3548 KB Output is correct
58 Correct 0 ms 3548 KB Output is correct
59 Correct 3 ms 3548 KB Output is correct
60 Correct 3 ms 3548 KB Output is correct
61 Correct 3 ms 3548 KB Output is correct
62 Correct 3 ms 3548 KB Output is correct
63 Correct 3 ms 3548 KB Output is correct
64 Correct 3 ms 3548 KB Output is correct
65 Correct 113 ms 3820 KB Output is correct
66 Correct 196 ms 3820 KB Output is correct
67 Correct 199 ms 3820 KB Output is correct
68 Correct 176 ms 3820 KB Output is correct
69 Correct 193 ms 3820 KB Output is correct
70 Correct 63 ms 3820 KB Output is correct
71 Correct 196 ms 3820 KB Output is correct
72 Correct 223 ms 3820 KB Output is correct
73 Correct 173 ms 3820 KB Output is correct
74 Correct 176 ms 3820 KB Output is correct
75 Correct 183 ms 3820 KB Output is correct
76 Correct 216 ms 3820 KB Output is correct
77 Correct 216 ms 3820 KB Output is correct
78 Correct 186 ms 3820 KB Output is correct
79 Correct 186 ms 3820 KB Output is correct
80 Correct 166 ms 3820 KB Output is correct
81 Execution timed out 2000 ms 5168 KB Execution timed out
82 Halted 0 ms 0 KB -