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답안 #784450

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
784450 2023-07-16T06:44:35 Z tosivanmak Feast (NOI19_feast) C++17
100 / 100
 373 ms 26656 KB 
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define ld long double

ll n,k;
ld arr[300005];
pair<ld,ll> dp[300005][2];
bool check(long double lambda) {
	dp[0][0] = {0, 0}, dp[0][1] = {-300000*1e9, 0};
	for (int i = 1; i <= n; ++i) {
		dp[i][0] = max(dp[i - 1][0], dp[i - 1][1]);
		dp[i][1] =
		    max(make_pair(dp[i - 1][1].first + arr[i], dp[i - 1][1].second),
		        make_pair(dp[i - 1][0].first + arr[i] - lambda,
		                  dp[i - 1][0].second + 1));
	}
	return max(dp[n][0], dp[n][1]).second >= k;
}
ld Aliens(){
    ld l=0,r=1e9*300000;
   while(r-l>=1e-4){
       ld mid=(l+r)/2;
       if(check(mid)){
           l=mid;
       }
       else{
           r=mid;
       }
   }
//    cout<<dpval<<" "<<lab<<" "<<l<<"\n";
bool orz=check(l);
ld store=k;
   return max(dp[n][0],dp[n][1]).first+store*l;
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);
    cin>>n>>k;
    for(int i=1;i<=n;i++){
        cin>>arr[i];
    }
    ld ans=Aliens();
     cout<<(ll)round(ans)<<"\n";
}

Compilation message

feast.cpp: In function 'long double Aliens()':
feast.cpp:32:6: warning: unused variable 'orz' [-Wunused-variable]
   32 | bool orz=check(l);
      |      ^~~

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 254 ms 23040 KB Output is correct
2 Correct 262 ms 23508 KB Output is correct
3 Correct 261 ms 23756 KB Output is correct
4 Correct 260 ms 23492 KB Output is correct
5 Correct 263 ms 23560 KB Output is correct
6 Correct 252 ms 23072 KB Output is correct
7 Correct 254 ms 22992 KB Output is correct
8 Correct 266 ms 23560 KB Output is correct
9 Correct 255 ms 23120 KB Output is correct
10 Correct 257 ms 23352 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 240 ms 23236 KB Output is correct
2 Correct 249 ms 23744 KB Output is correct
3 Correct 247 ms 23136 KB Output is correct
4 Correct 243 ms 23372 KB Output is correct
5 Correct 250 ms 23104 KB Output is correct
6 Correct 242 ms 23180 KB Output is correct
7 Correct 241 ms 23796 KB Output is correct
8 Correct 260 ms 23628 KB Output is correct
9 Correct 256 ms 23040 KB Output is correct
10 Correct 246 ms 23628 KB Output is correct

Subtask #3
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 299 ms 23544 KB Output is correct
2 Correct 292 ms 23172 KB Output is correct
3 Correct 292 ms 23464 KB Output is correct
4 Correct 301 ms 23252 KB Output is correct
5 Correct 291 ms 23448 KB Output is correct
6 Correct 294 ms 23608 KB Output is correct
7 Correct 291 ms 23668 KB Output is correct
8 Correct 291 ms 23476 KB Output is correct
9 Correct 299 ms 23768 KB Output is correct
10 Correct 302 ms 23700 KB Output is correct

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct

Subtask #5
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct

Subtask #6
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 2 ms 468 KB Output is correct
22 Correct 2 ms 468 KB Output is correct
23 Correct 2 ms 468 KB Output is correct
24 Correct 2 ms 468 KB Output is correct
25 Correct 2 ms 468 KB Output is correct
26 Correct 2 ms 468 KB Output is correct
27 Correct 2 ms 468 KB Output is correct
28 Correct 2 ms 468 KB Output is correct
29 Correct 2 ms 468 KB Output is correct
30 Correct 2 ms 468 KB Output is correct

Subtask #7
29.0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 254 ms 23040 KB Output is correct
2 Correct 262 ms 23508 KB Output is correct
3 Correct 261 ms 23756 KB Output is correct
4 Correct 260 ms 23492 KB Output is correct
5 Correct 263 ms 23560 KB Output is correct
6 Correct 252 ms 23072 KB Output is correct
7 Correct 254 ms 22992 KB Output is correct
8 Correct 266 ms 23560 KB Output is correct
9 Correct 255 ms 23120 KB Output is correct
10 Correct 257 ms 23352 KB Output is correct
11 Correct 240 ms 23236 KB Output is correct
12 Correct 249 ms 23744 KB Output is correct
13 Correct 247 ms 23136 KB Output is correct
14 Correct 243 ms 23372 KB Output is correct
15 Correct 250 ms 23104 KB Output is correct
16 Correct 242 ms 23180 KB Output is correct
17 Correct 241 ms 23796 KB Output is correct
18 Correct 260 ms 23628 KB Output is correct
19 Correct 256 ms 23040 KB Output is correct
20 Correct 246 ms 23628 KB Output is correct
21 Correct 299 ms 23544 KB Output is correct
22 Correct 292 ms 23172 KB Output is correct
23 Correct 292 ms 23464 KB Output is correct
24 Correct 301 ms 23252 KB Output is correct
25 Correct 291 ms 23448 KB Output is correct
26 Correct 294 ms 23608 KB Output is correct
27 Correct 291 ms 23668 KB Output is correct
28 Correct 291 ms 23476 KB Output is correct
29 Correct 299 ms 23768 KB Output is correct
30 Correct 302 ms 23700 KB Output is correct
31 Correct 0 ms 340 KB Output is correct
32 Correct 0 ms 340 KB Output is correct
33 Correct 0 ms 340 KB Output is correct
34 Correct 0 ms 340 KB Output is correct
35 Correct 0 ms 340 KB Output is correct
36 Correct 0 ms 340 KB Output is correct
37 Correct 0 ms 340 KB Output is correct
38 Correct 0 ms 340 KB Output is correct
39 Correct 0 ms 340 KB Output is correct
40 Correct 1 ms 340 KB Output is correct
41 Correct 1 ms 340 KB Output is correct
42 Correct 1 ms 340 KB Output is correct
43 Correct 1 ms 340 KB Output is correct
44 Correct 1 ms 340 KB Output is correct
45 Correct 1 ms 340 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 1 ms 340 KB Output is correct
48 Correct 1 ms 340 KB Output is correct
49 Correct 1 ms 340 KB Output is correct
50 Correct 1 ms 340 KB Output is correct
51 Correct 2 ms 468 KB Output is correct
52 Correct 2 ms 468 KB Output is correct
53 Correct 2 ms 468 KB Output is correct
54 Correct 2 ms 468 KB Output is correct
55 Correct 2 ms 468 KB Output is correct
56 Correct 2 ms 468 KB Output is correct
57 Correct 2 ms 468 KB Output is correct
58 Correct 2 ms 468 KB Output is correct
59 Correct 2 ms 468 KB Output is correct
60 Correct 2 ms 468 KB Output is correct
61 Correct 357 ms 23212 KB Output is correct
62 Correct 359 ms 23756 KB Output is correct
63 Correct 317 ms 26132 KB Output is correct
64 Correct 371 ms 26656 KB Output is correct
65 Correct 373 ms 26572 KB Output is correct
66 Correct 370 ms 26564 KB Output is correct
67 Correct 366 ms 26220 KB Output is correct
68 Correct 295 ms 26604 KB Output is correct
69 Correct 289 ms 26152 KB Output is correct
70 Correct 286 ms 25952 KB Output is correct