답안 #69946 :: oj.uz

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
69946	2018-08-22T05:57:03 Z	Just_Solve_The_Problem	Sparklers (JOI17_sparklers)	C++11	100 / 100	240 ms	12844 KB

sparklers

#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

#	결과	실행 시간	메모리	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

#	결과	실행 시간	메모리	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

#	결과	실행 시간	메모리	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

답안 #69946

Compilation message

Subtask #1 30.0 / 30.0

Subtask #2 20.0 / 20.0

Subtask #3 50.0 / 50.0

Subtask #1
30.0 / 30.0

Subtask #2
20.0 / 20.0

Subtask #3
50.0 / 50.0