답안 #357547

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
357547	2021-01-24T05:38:07 Z	YJU	Sparklers (JOI17_sparklers)	C++14	100 / 100	30 ms	2944 KB

sparklers

#include<bits/stdc++.h>
#pragma GCC optimize("unroll-loops,no-stack-protector")
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> pll;
const ll MOD=1e9+7;
const ll MOD2=998244353;
const ll N=1e6+5;
const ld pi=acos(-1);
const ll INF=(1LL<<60);
#define SQ(i) ((i)*(i))
#define REP(i,n) for(ll i=0;i<n;i++)
#define REP1(i,n) for(ll i=1;i<=n;i++)
#define pb push_back
#define mp make_pair
#define X first
#define Y second
#define setp setprecision
#define lwb lower_bound
#define SZ(_a) (ll)_a.size()
 
ll n,JOI,t,x[N],u[N];
 
bool ck(ll k){
	REP1(i,n)x[i]=u[i]-2*k*t*i;
	ll gl=1,gr=n;
	for(int i=1;i<=JOI;i++)gl=(x[i]>x[gl]?i:gl);
	for(int i=JOI;i<=n;i++)gr=(x[i]<x[gr]?i:gr);
	ll ql=JOI,qr=JOI;
	ll lv=x[ql],rv=x[qr];
	while(ql>=gl||qr<=gr){
		ll bl=ql,br=qr;
		for(;qr<=gr&&lv>=x[qr];qr++)rv=min(rv,x[qr]);
		for(;ql>=gl&&x[ql]>=rv;ql--)lv=max(lv,x[ql]);
		if(bl==ql&&br==qr)return 0;
	}
	ql=1;qr=n;
	lv=x[ql];rv=x[qr];
	while(ql<=gl||qr>=gr){
		ll bl=ql,br=qr;
		for(;qr>=gr&&lv>=x[qr];qr--)rv=min(rv,x[qr]);
		for(;ql<=gl&&x[ql]>=rv;ql++)lv=max(lv,x[ql]);
		if(bl==ql&&br==qr)return 0;
	}
	return 1;
}
 
int main(){
	ios_base::sync_with_stdio(0);cin.tie(0);
	cin>>n>>JOI>>t;
	REP1(i,n)cin>>u[i];
	ll l=-1,r=1e9+10;
	while(r-l>1){
		ll mid=(l+r)>>1;
		if(ck(mid)){
			r=mid;
		}else{
			l=mid;
		}
	}
	cout<<r<<"\n";
	return 0;
}

Subtask #1
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	1 ms	384 KB	Output is correct
3	Correct	1 ms	376 KB	Output is correct
4	Correct	1 ms	364 KB	Output is correct
5	Correct	1 ms	364 KB	Output is correct
6	Correct	1 ms	364 KB	Output is correct
7	Correct	1 ms	384 KB	Output is correct
8	Correct	1 ms	364 KB	Output is correct
9	Correct	1 ms	384 KB	Output is correct
10	Correct	1 ms	364 KB	Output is correct
11	Correct	1 ms	364 KB	Output is correct
12	Correct	1 ms	364 KB	Output is correct
13	Correct	1 ms	364 KB	Output is correct
14	Correct	1 ms	364 KB	Output is correct
15	Correct	1 ms	384 KB	Output is correct
16	Correct	1 ms	364 KB	Output is correct
17	Correct	1 ms	364 KB	Output is correct
18	Correct	1 ms	364 KB	Output is correct
19	Correct	1 ms	364 KB	Output is correct
20	Correct	1 ms	364 KB	Output is correct
21	Correct	1 ms	364 KB	Output is correct

Subtask #2
20.0 / 20.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	1 ms	384 KB	Output is correct
3	Correct	1 ms	376 KB	Output is correct
4	Correct	1 ms	364 KB	Output is correct
5	Correct	1 ms	364 KB	Output is correct
6	Correct	1 ms	364 KB	Output is correct
7	Correct	1 ms	384 KB	Output is correct
8	Correct	1 ms	364 KB	Output is correct
9	Correct	1 ms	384 KB	Output is correct
10	Correct	1 ms	364 KB	Output is correct
11	Correct	1 ms	364 KB	Output is correct
12	Correct	1 ms	364 KB	Output is correct
13	Correct	1 ms	364 KB	Output is correct
14	Correct	1 ms	364 KB	Output is correct
15	Correct	1 ms	384 KB	Output is correct
16	Correct	1 ms	364 KB	Output is correct
17	Correct	1 ms	364 KB	Output is correct
18	Correct	1 ms	364 KB	Output is correct
19	Correct	1 ms	364 KB	Output is correct
20	Correct	1 ms	364 KB	Output is correct
21	Correct	1 ms	364 KB	Output is correct
22	Correct	1 ms	364 KB	Output is correct
23	Correct	1 ms	364 KB	Output is correct
24	Correct	1 ms	364 KB	Output is correct
25	Correct	1 ms	364 KB	Output is correct
26	Correct	1 ms	364 KB	Output is correct
27	Correct	1 ms	364 KB	Output is correct
28	Correct	1 ms	364 KB	Output is correct
29	Correct	1 ms	512 KB	Output is correct
30	Correct	1 ms	364 KB	Output is correct
31	Correct	1 ms	512 KB	Output is correct
32	Correct	1 ms	364 KB	Output is correct
33	Correct	1 ms	364 KB	Output is correct
34	Correct	1 ms	364 KB	Output is correct
35	Correct	1 ms	364 KB	Output is correct
36	Correct	1 ms	364 KB	Output is correct
37	Correct	1 ms	396 KB	Output is correct
38	Correct	1 ms	384 KB	Output is correct
39	Correct	1 ms	364 KB	Output is correct
40	Correct	1 ms	364 KB	Output is correct

Subtask #3
50.0 / 50.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	364 KB	Output is correct
2	Correct	1 ms	384 KB	Output is correct
3	Correct	1 ms	376 KB	Output is correct
4	Correct	1 ms	364 KB	Output is correct
5	Correct	1 ms	364 KB	Output is correct
6	Correct	1 ms	364 KB	Output is correct
7	Correct	1 ms	384 KB	Output is correct
8	Correct	1 ms	364 KB	Output is correct
9	Correct	1 ms	384 KB	Output is correct
10	Correct	1 ms	364 KB	Output is correct
11	Correct	1 ms	364 KB	Output is correct
12	Correct	1 ms	364 KB	Output is correct
13	Correct	1 ms	364 KB	Output is correct
14	Correct	1 ms	364 KB	Output is correct
15	Correct	1 ms	384 KB	Output is correct
16	Correct	1 ms	364 KB	Output is correct
17	Correct	1 ms	364 KB	Output is correct
18	Correct	1 ms	364 KB	Output is correct
19	Correct	1 ms	364 KB	Output is correct
20	Correct	1 ms	364 KB	Output is correct
21	Correct	1 ms	364 KB	Output is correct
22	Correct	1 ms	364 KB	Output is correct
23	Correct	1 ms	364 KB	Output is correct
24	Correct	1 ms	364 KB	Output is correct
25	Correct	1 ms	364 KB	Output is correct
26	Correct	1 ms	364 KB	Output is correct
27	Correct	1 ms	364 KB	Output is correct
28	Correct	1 ms	364 KB	Output is correct
29	Correct	1 ms	512 KB	Output is correct
30	Correct	1 ms	364 KB	Output is correct
31	Correct	1 ms	512 KB	Output is correct
32	Correct	1 ms	364 KB	Output is correct
33	Correct	1 ms	364 KB	Output is correct
34	Correct	1 ms	364 KB	Output is correct
35	Correct	1 ms	364 KB	Output is correct
36	Correct	1 ms	364 KB	Output is correct
37	Correct	1 ms	396 KB	Output is correct
38	Correct	1 ms	384 KB	Output is correct
39	Correct	1 ms	364 KB	Output is correct
40	Correct	1 ms	364 KB	Output is correct
41	Correct	21 ms	2028 KB	Output is correct
42	Correct	1 ms	364 KB	Output is correct
43	Correct	6 ms	876 KB	Output is correct
44	Correct	28 ms	2924 KB	Output is correct
45	Correct	26 ms	2924 KB	Output is correct
46	Correct	27 ms	2924 KB	Output is correct
47	Correct	28 ms	2924 KB	Output is correct
48	Correct	26 ms	2924 KB	Output is correct
49	Correct	29 ms	2924 KB	Output is correct
50	Correct	27 ms	2924 KB	Output is correct
51	Correct	27 ms	2924 KB	Output is correct
52	Correct	30 ms	2924 KB	Output is correct
53	Correct	26 ms	2924 KB	Output is correct
54	Correct	27 ms	2924 KB	Output is correct
55	Correct	26 ms	2924 KB	Output is correct
56	Correct	29 ms	2924 KB	Output is correct
57	Correct	26 ms	2924 KB	Output is correct
58	Correct	27 ms	2944 KB	Output is correct
59	Correct	23 ms	2156 KB	Output is correct
60	Correct	26 ms	2924 KB	Output is correct
61	Correct	25 ms	2796 KB	Output is correct
62	Correct	26 ms	2924 KB	Output is correct
63	Correct	28 ms	2924 KB	Output is correct
64	Correct	26 ms	2884 KB	Output is correct
65	Correct	26 ms	2924 KB	Output is correct
66	Correct	26 ms	2924 KB	Output is correct
67	Correct	26 ms	2924 KB	Output is correct
68	Correct	26 ms	2924 KB	Output is correct
69	Correct	26 ms	2924 KB	Output is correct

답안 #357547

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