Submission #305616

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
305616	2020-09-23T17:19:29 Z	youngyojun	Sparklers (JOI17_sparklers)	C++17	100 / 100	43 ms	1920 KB

sparklers

#include <bits/stdc++.h>
#define pb push_back
#define eb emplace_back
#define allv(V) ((V).begin()),((V).end())
#define sorv(V) sort(allv(V))
#define univ(V) (V).erase(unique(allv(V)),(V).end())
#define sz(V) ((int)(V).size())
#define upmin(a,b) (a)=min((a),(b))
#define upmax(a,b) (a)=max((a),(b))
#define INF (0x3f3f3f3f)
#define INFLL (0x3f3f3f3f3f3f3f3fll)
using namespace std;
typedef long long ll;
 
const int MAXN = 100005;
 
int A[MAXN];
 
int N, K, T, P;
 
ll f(int P, int i) { return ll(A[i]) - 2ll * P * T * i; }
ll g(int P, int i) { return -f(P, i); }
ll g(int i) { return g(P, i); }
 
bool isp(int P) {
	::P = P;
	if(g(1) > g(N)) return false;
 
	int pl = K, pr = K, l = K, r = K;
	for(int i = 1; i <= K; i++) if(g(i) < g(pl)) pl = i;
	for(int i = K; i <= N; i++) if(g(pr) <= g(i)) pr = i;
 
	for(;;) {
		bool flag = false;
		int i = l;
		for(; pl < i;) {
			if(g(i-1) <= g(r)) {
				i--;
				if(g(i) <= g(l)) break;
				continue;
			}
			break;
		}
		if(i < l && g(i) <= g(l)) {
			flag = true;
			l = i;
		}
		for(i = r; i < pr;) {
			if(g(l) <= g(i+1)) {
				i++;
				if(g(r) <= g(i)) break;
				continue;
			}
			break;
		}
		if(r < i && g(r) <= g(i)) {
			flag = true;
			r = i;
		}
		if(!flag) break;
	}
	
	if(l != pl || r != pr) return false;
 
	l = 1; r = N;
	for(;;) {
		bool flag = false;
		int i = l;
		for(; i < pl;) {
			if(g(i+1) <= g(r)) {
				i++;
				if(g(i) <= g(l)) break;
				continue;
			}
			break;
		}
		if(l < i && g(i) <= g(l)) {
			flag = true;
			l = i;
		}
		for(i = r; pr < i;) {
			if(g(l) <= g(i-1)) {
				i--;
				if(g(r) <= g(i)) break;
				continue;
			}
			break;
		}
		if(i < r && g(r) <= g(i)) {
			flag = true;
			r = i;
		}
		if(!flag) break;
	}
 
	return l == pl && r == pr;
}
 
int getAns() {
	int s = 0, e = INF/T+2; for(int m; s < e;) {
		m = (s+e) >> 1;
		if(isp(m)) e = m;
		else s = m+1;
	}
	return s;
}
 
int main() {
	ios::sync_with_stdio(false);
 
	cin >> N >> K >> T;
	for(int i = 1; i <= N; i++) cin >> A[i];
 
	cout << getAns() << endl;
	return 0;
}

Subtask #1
30.0 / 30.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	384 KB	Output is correct
2	Correct	1 ms	384 KB	Output is correct
3	Correct	1 ms	384 KB	Output is correct
4	Correct	1 ms	384 KB	Output is correct
5	Correct	1 ms	384 KB	Output is correct
6	Correct	1 ms	384 KB	Output is correct
7	Correct	1 ms	384 KB	Output is correct
8	Correct	1 ms	396 KB	Output is correct
9	Correct	1 ms	384 KB	Output is correct
10	Correct	1 ms	384 KB	Output is correct
11	Correct	1 ms	384 KB	Output is correct
12	Correct	1 ms	384 KB	Output is correct
13	Correct	1 ms	384 KB	Output is correct
14	Correct	1 ms	384 KB	Output is correct
15	Correct	1 ms	384 KB	Output is correct
16	Correct	1 ms	384 KB	Output is correct
17	Correct	1 ms	384 KB	Output is correct
18	Correct	1 ms	384 KB	Output is correct
19	Correct	1 ms	384 KB	Output is correct
20	Correct	1 ms	384 KB	Output is correct
21	Correct	1 ms	384 KB	Output is correct

Subtask #2
20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	384 KB	Output is correct
2	Correct	1 ms	384 KB	Output is correct
3	Correct	1 ms	384 KB	Output is correct
4	Correct	1 ms	384 KB	Output is correct
5	Correct	1 ms	384 KB	Output is correct
6	Correct	1 ms	384 KB	Output is correct
7	Correct	1 ms	384 KB	Output is correct
8	Correct	1 ms	396 KB	Output is correct
9	Correct	1 ms	384 KB	Output is correct
10	Correct	1 ms	384 KB	Output is correct
11	Correct	1 ms	384 KB	Output is correct
12	Correct	1 ms	384 KB	Output is correct
13	Correct	1 ms	384 KB	Output is correct
14	Correct	1 ms	384 KB	Output is correct
15	Correct	1 ms	384 KB	Output is correct
16	Correct	1 ms	384 KB	Output is correct
17	Correct	1 ms	384 KB	Output is correct
18	Correct	1 ms	384 KB	Output is correct
19	Correct	1 ms	384 KB	Output is correct
20	Correct	1 ms	384 KB	Output is correct
21	Correct	1 ms	384 KB	Output is correct
22	Correct	1 ms	384 KB	Output is correct
23	Correct	1 ms	384 KB	Output is correct
24	Correct	1 ms	384 KB	Output is correct
25	Correct	1 ms	384 KB	Output is correct
26	Correct	1 ms	384 KB	Output is correct
27	Correct	1 ms	384 KB	Output is correct
28	Correct	1 ms	384 KB	Output is correct
29	Correct	1 ms	384 KB	Output is correct
30	Correct	1 ms	384 KB	Output is correct
31	Correct	1 ms	384 KB	Output is correct
32	Correct	1 ms	384 KB	Output is correct
33	Correct	1 ms	384 KB	Output is correct
34	Correct	1 ms	384 KB	Output is correct
35	Correct	1 ms	384 KB	Output is correct
36	Correct	1 ms	384 KB	Output is correct
37	Correct	1 ms	384 KB	Output is correct
38	Correct	1 ms	384 KB	Output is correct
39	Correct	1 ms	384 KB	Output is correct
40	Correct	1 ms	384 KB	Output is correct

Subtask #3
50.0 / 50.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	384 KB	Output is correct
2	Correct	1 ms	384 KB	Output is correct
3	Correct	1 ms	384 KB	Output is correct
4	Correct	1 ms	384 KB	Output is correct
5	Correct	1 ms	384 KB	Output is correct
6	Correct	1 ms	384 KB	Output is correct
7	Correct	1 ms	384 KB	Output is correct
8	Correct	1 ms	396 KB	Output is correct
9	Correct	1 ms	384 KB	Output is correct
10	Correct	1 ms	384 KB	Output is correct
11	Correct	1 ms	384 KB	Output is correct
12	Correct	1 ms	384 KB	Output is correct
13	Correct	1 ms	384 KB	Output is correct
14	Correct	1 ms	384 KB	Output is correct
15	Correct	1 ms	384 KB	Output is correct
16	Correct	1 ms	384 KB	Output is correct
17	Correct	1 ms	384 KB	Output is correct
18	Correct	1 ms	384 KB	Output is correct
19	Correct	1 ms	384 KB	Output is correct
20	Correct	1 ms	384 KB	Output is correct
21	Correct	1 ms	384 KB	Output is correct
22	Correct	1 ms	384 KB	Output is correct
23	Correct	1 ms	384 KB	Output is correct
24	Correct	1 ms	384 KB	Output is correct
25	Correct	1 ms	384 KB	Output is correct
26	Correct	1 ms	384 KB	Output is correct
27	Correct	1 ms	384 KB	Output is correct
28	Correct	1 ms	384 KB	Output is correct
29	Correct	1 ms	384 KB	Output is correct
30	Correct	1 ms	384 KB	Output is correct
31	Correct	1 ms	384 KB	Output is correct
32	Correct	1 ms	384 KB	Output is correct
33	Correct	1 ms	384 KB	Output is correct
34	Correct	1 ms	384 KB	Output is correct
35	Correct	1 ms	384 KB	Output is correct
36	Correct	1 ms	384 KB	Output is correct
37	Correct	1 ms	384 KB	Output is correct
38	Correct	1 ms	384 KB	Output is correct
39	Correct	1 ms	384 KB	Output is correct
40	Correct	1 ms	384 KB	Output is correct
41	Correct	22 ms	1280 KB	Output is correct
42	Correct	2 ms	416 KB	Output is correct
43	Correct	7 ms	640 KB	Output is correct
44	Correct	43 ms	1664 KB	Output is correct
45	Correct	35 ms	1664 KB	Output is correct
46	Correct	34 ms	1664 KB	Output is correct
47	Correct	34 ms	1664 KB	Output is correct
48	Correct	33 ms	1664 KB	Output is correct
49	Correct	35 ms	1664 KB	Output is correct
50	Correct	31 ms	1664 KB	Output is correct
51	Correct	36 ms	1664 KB	Output is correct
52	Correct	35 ms	1664 KB	Output is correct
53	Correct	36 ms	1664 KB	Output is correct
54	Correct	37 ms	1664 KB	Output is correct
55	Correct	37 ms	1664 KB	Output is correct
56	Correct	33 ms	1756 KB	Output is correct
57	Correct	36 ms	1664 KB	Output is correct
58	Correct	33 ms	1664 KB	Output is correct
59	Correct	32 ms	896 KB	Output is correct
60	Correct	34 ms	1664 KB	Output is correct
61	Correct	33 ms	1664 KB	Output is correct
62	Correct	31 ms	1664 KB	Output is correct
63	Correct	33 ms	1664 KB	Output is correct
64	Correct	33 ms	1920 KB	Output is correct
65	Correct	31 ms	1664 KB	Output is correct
66	Correct	33 ms	1784 KB	Output is correct
67	Correct	32 ms	1664 KB	Output is correct
68	Correct	34 ms	1664 KB	Output is correct
69	Correct	33 ms	1664 KB	Output is correct

Submission #305616

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