oj.uz

Submission #69946

# Submission time Handle Problem Language Result Execution time Memory
69946 2018-08-22T05:57:03 Z Just_Solve_The_Problem Sparklers (JOI17_sparklers) C++11
100 / 100
 240 ms 12844 KB 
#include <bits/stdc++.h>

using namespace std;

#define pb push_back
#define eb emplace_back
#define ll long long
#define pii pair < int, int >
#define fr first
#define sc second
#define mk make_pair
#define sz(s) (int)s.size()
#define all(s) s.begin(), s.end()
#define OK puts("ok");
#define whatis(x) cerr << #x << " = " << x << endl;
#define pause system("pause");
#define ld long double

const ll N = (int)1e5 + 7;
const int inf = (int)1e9 + 7;
int mod = (int)1e9 + 7;
int n, k, t;
int X[N];

bool make(vector < ld > x, vector < ld > y) {
  if (x[0] < y[0]) return 0;
  int ok = 1;
  pii L, R;
  L = mk(0, 0);
  R = mk(0, 0);
  while (ok) {
    ok = 0;
    while (L.fr + 1 < sz(x) && x[L.fr + 1] >= y[R.sc]) {
      ok = 1;
      if (x[++L.fr] > x[L.sc]) L.sc = L.fr;
    }
    while (R.fr + 1 < sz(y) && y[R.fr + 1] <= x[L.sc]) {
      ok = 1;
      if (y[++R.fr] < y[R.sc]) R.sc = R.fr;
    }
  }
  return L.fr + 1 == sz(x) && R.fr + 1 == sz(y);
}

bool check(int s) {
  vector < ld > x, y;
  for (ll i = k; i >= 0; i--)
    x.pb(X[i] - (ld)2 * s * t * i);
  for (ll i = k; i < n; i++)
    y.pb(X[i] - (ld)2 * s * t * i);
  if (!make(x, y)) return 0;
  reverse(all(x));
  reverse(all(y));
  if (!make(x, y)) return 0;
  return 1;
}

main() {
  cin >> n >> k >> t;
  k--;
  for (ll i = 0; i < n; i++) {
    cin >> X[i];
  }
  int l = 0;
  int r = 1e9;
  while (l < r) {
    ll mid = (l + r) / 2;
    if (check(mid)) {
      r = mid;
    } else {
      l = mid + 1;
    }
  }
  cout << l;
}

Compilation message

sparklers.cpp:58:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main() {
      ^

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 2 ms 488 KB Output is correct
3 Correct 3 ms 548 KB Output is correct
4 Correct 2 ms 548 KB Output is correct
5 Correct 3 ms 548 KB Output is correct
6 Correct 3 ms 548 KB Output is correct
7 Correct 3 ms 568 KB Output is correct
8 Correct 2 ms 568 KB Output is correct
9 Correct 2 ms 576 KB Output is correct
10 Correct 2 ms 576 KB Output is correct
11 Correct 2 ms 576 KB Output is correct
12 Correct 2 ms 576 KB Output is correct
13 Correct 3 ms 632 KB Output is correct
14 Correct 3 ms 632 KB Output is correct
15 Correct 3 ms 632 KB Output is correct
16 Correct 2 ms 632 KB Output is correct
17 Correct 4 ms 632 KB Output is correct
18 Correct 2 ms 648 KB Output is correct
19 Correct 2 ms 648 KB Output is correct
20 Correct 3 ms 648 KB Output is correct
21 Correct 3 ms 648 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 2 ms 488 KB Output is correct
3 Correct 3 ms 548 KB Output is correct
4 Correct 2 ms 548 KB Output is correct
5 Correct 3 ms 548 KB Output is correct
6 Correct 3 ms 548 KB Output is correct
7 Correct 3 ms 568 KB Output is correct
8 Correct 2 ms 568 KB Output is correct
9 Correct 2 ms 576 KB Output is correct
10 Correct 2 ms 576 KB Output is correct
11 Correct 2 ms 576 KB Output is correct
12 Correct 2 ms 576 KB Output is correct
13 Correct 3 ms 632 KB Output is correct
14 Correct 3 ms 632 KB Output is correct
15 Correct 3 ms 632 KB Output is correct
16 Correct 2 ms 632 KB Output is correct
17 Correct 4 ms 632 KB Output is correct
18 Correct 2 ms 648 KB Output is correct
19 Correct 2 ms 648 KB Output is correct
20 Correct 3 ms 648 KB Output is correct
21 Correct 3 ms 648 KB Output is correct
22 Correct 5 ms 676 KB Output is correct
23 Correct 3 ms 676 KB Output is correct
24 Correct 4 ms 688 KB Output is correct
25 Correct 4 ms 700 KB Output is correct
26 Correct 5 ms 716 KB Output is correct
27 Correct 5 ms 716 KB Output is correct
28 Correct 5 ms 752 KB Output is correct
29 Correct 3 ms 752 KB Output is correct
30 Correct 5 ms 760 KB Output is correct
31 Correct 4 ms 772 KB Output is correct
32 Correct 5 ms 860 KB Output is correct
33 Correct 4 ms 860 KB Output is correct
34 Correct 4 ms 860 KB Output is correct
35 Correct 4 ms 860 KB Output is correct
36 Correct 4 ms 860 KB Output is correct
37 Correct 5 ms 860 KB Output is correct
38 Correct 4 ms 860 KB Output is correct
39 Correct 4 ms 868 KB Output is correct
40 Correct 4 ms 880 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 2 ms 488 KB Output is correct
3 Correct 3 ms 548 KB Output is correct
4 Correct 2 ms 548 KB Output is correct
5 Correct 3 ms 548 KB Output is correct
6 Correct 3 ms 548 KB Output is correct
7 Correct 3 ms 568 KB Output is correct
8 Correct 2 ms 568 KB Output is correct
9 Correct 2 ms 576 KB Output is correct
10 Correct 2 ms 576 KB Output is correct
11 Correct 2 ms 576 KB Output is correct
12 Correct 2 ms 576 KB Output is correct
13 Correct 3 ms 632 KB Output is correct
14 Correct 3 ms 632 KB Output is correct
15 Correct 3 ms 632 KB Output is correct
16 Correct 2 ms 632 KB Output is correct
17 Correct 4 ms 632 KB Output is correct
18 Correct 2 ms 648 KB Output is correct
19 Correct 2 ms 648 KB Output is correct
20 Correct 3 ms 648 KB Output is correct
21 Correct 3 ms 648 KB Output is correct
22 Correct 5 ms 676 KB Output is correct
23 Correct 3 ms 676 KB Output is correct
24 Correct 4 ms 688 KB Output is correct
25 Correct 4 ms 700 KB Output is correct
26 Correct 5 ms 716 KB Output is correct
27 Correct 5 ms 716 KB Output is correct
28 Correct 5 ms 752 KB Output is correct
29 Correct 3 ms 752 KB Output is correct
30 Correct 5 ms 760 KB Output is correct
31 Correct 4 ms 772 KB Output is correct
32 Correct 5 ms 860 KB Output is correct
33 Correct 4 ms 860 KB Output is correct
34 Correct 4 ms 860 KB Output is correct
35 Correct 4 ms 860 KB Output is correct
36 Correct 4 ms 860 KB Output is correct
37 Correct 5 ms 860 KB Output is correct
38 Correct 4 ms 860 KB Output is correct
39 Correct 4 ms 868 KB Output is correct
40 Correct 4 ms 880 KB Output is correct
41 Correct 177 ms 4480 KB Output is correct
42 Correct 8 ms 4480 KB Output is correct
43 Correct 47 ms 4480 KB Output is correct
44 Correct 231 ms 6928 KB Output is correct
45 Correct 231 ms 7764 KB Output is correct
46 Correct 204 ms 8744 KB Output is correct
47 Correct 201 ms 9700 KB Output is correct
48 Correct 190 ms 10220 KB Output is correct
49 Correct 195 ms 11588 KB Output is correct
50 Correct 191 ms 11660 KB Output is correct
51 Correct 218 ms 11920 KB Output is correct
52 Correct 218 ms 12652 KB Output is correct
53 Correct 202 ms 12652 KB Output is correct
54 Correct 229 ms 12764 KB Output is correct
55 Correct 239 ms 12764 KB Output is correct
56 Correct 226 ms 12764 KB Output is correct
57 Correct 200 ms 12764 KB Output is correct
58 Correct 240 ms 12764 KB Output is correct
59 Correct 215 ms 12764 KB Output is correct
60 Correct 211 ms 12844 KB Output is correct
61 Correct 217 ms 12844 KB Output is correct
62 Correct 190 ms 12844 KB Output is correct
63 Correct 200 ms 12844 KB Output is correct
64 Correct 186 ms 12844 KB Output is correct
65 Correct 196 ms 12844 KB Output is correct
66 Correct 189 ms 12844 KB Output is correct
67 Correct 182 ms 12844 KB Output is correct
68 Correct 209 ms 12844 KB Output is correct
69 Correct 220 ms 12844 KB Output is correct