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Submission #731516

# Submission time Handle Problem Language Result Execution time Memory
731516 2023-04-27T13:44:24 Z mohav48173 Feast (NOI19_feast) C++14
100 / 100
 257 ms 5012 KB 
#include<bits/stdc++.h>
using namespace std;
int n,k;
long long a[400000];
long long m[400000];
long long mincnt=0;
long double score=0;
long double get(int ind) {
    if(ind<0)return 0;
    else return m[ind];
}
void calc(long double lam) {
    long double bestscore=0;
    long long bestcnt=0;
    long double bestnxt=-lam;
    long long nxtcnt=0;
    for(int i=0;i<n;i++) {
        if(bestscore-lam-get(i-1)>bestnxt ||
           (bestscore-lam-get(i-1)==bestnxt && nxtcnt>bestcnt)) {
            bestnxt=bestscore-get(i-1)-lam;
            nxtcnt=bestcnt;
        }
        if(bestnxt+get(i)>bestscore || (bestnxt+get(i)==bestscore && nxtcnt+1<bestcnt)) {
            bestscore=bestnxt+get(i);
            bestcnt=nxtcnt+1;
        }
    }
    mincnt=bestcnt;
    score=bestscore;
}
int main() {
    ios_base::sync_with_stdio(0);cin.tie(0);
    cin>>n>>k;
    for(int i=0;i<n;i++)cin>>a[i];
    m[0]=a[0];for(int i=1;i<n;i++)m[i]=m[i-1]+a[i];
    long double l=0,r=1e16;
    while((r-l)>(long double)(1e-6)) {
        long double mid=(l+r)/2.0;
        calc(mid);
        if(mincnt<=k)r=mid;
        else l=mid;
    }
    calc(r);
    cout<<(long long)(round(score+k*r))<<endl;
    return 0;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 104 ms 4864 KB Output is correct
2 Correct 85 ms 4948 KB Output is correct
3 Correct 85 ms 4960 KB Output is correct
4 Correct 83 ms 4960 KB Output is correct
5 Correct 87 ms 4952 KB Output is correct
6 Correct 84 ms 4756 KB Output is correct
7 Correct 81 ms 4892 KB Output is correct
8 Correct 85 ms 4964 KB Output is correct
9 Correct 79 ms 4916 KB Output is correct
10 Correct 86 ms 4820 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 73 ms 4904 KB Output is correct
2 Correct 71 ms 4948 KB Output is correct
3 Correct 70 ms 4888 KB Output is correct
4 Correct 73 ms 4948 KB Output is correct
5 Correct 91 ms 4876 KB Output is correct
6 Correct 72 ms 4884 KB Output is correct
7 Correct 70 ms 5012 KB Output is correct
8 Correct 83 ms 4948 KB Output is correct
9 Correct 84 ms 4856 KB Output is correct
10 Correct 72 ms 4960 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 134 ms 4956 KB Output is correct
2 Correct 139 ms 4904 KB Output is correct
3 Correct 141 ms 4948 KB Output is correct
4 Correct 130 ms 4900 KB Output is correct
5 Correct 136 ms 4936 KB Output is correct
6 Correct 144 ms 4972 KB Output is correct
7 Correct 139 ms 4940 KB Output is correct
8 Correct 129 ms 4936 KB Output is correct
9 Correct 136 ms 5004 KB Output is correct
10 Correct 144 ms 4988 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 340 KB Output is correct

Subtask #5
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 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

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 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 340 KB Output is correct
22 Correct 2 ms 340 KB Output is correct
23 Correct 2 ms 340 KB Output is correct
24 Correct 2 ms 340 KB Output is correct
25 Correct 2 ms 340 KB Output is correct
26 Correct 2 ms 340 KB Output is correct
27 Correct 2 ms 340 KB Output is correct
28 Correct 2 ms 340 KB Output is correct
29 Correct 2 ms 340 KB Output is correct
30 Correct 2 ms 340 KB Output is correct

Subtask #7
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 104 ms 4864 KB Output is correct
2 Correct 85 ms 4948 KB Output is correct
3 Correct 85 ms 4960 KB Output is correct
4 Correct 83 ms 4960 KB Output is correct
5 Correct 87 ms 4952 KB Output is correct
6 Correct 84 ms 4756 KB Output is correct
7 Correct 81 ms 4892 KB Output is correct
8 Correct 85 ms 4964 KB Output is correct
9 Correct 79 ms 4916 KB Output is correct
10 Correct 86 ms 4820 KB Output is correct
11 Correct 73 ms 4904 KB Output is correct
12 Correct 71 ms 4948 KB Output is correct
13 Correct 70 ms 4888 KB Output is correct
14 Correct 73 ms 4948 KB Output is correct
15 Correct 91 ms 4876 KB Output is correct
16 Correct 72 ms 4884 KB Output is correct
17 Correct 70 ms 5012 KB Output is correct
18 Correct 83 ms 4948 KB Output is correct
19 Correct 84 ms 4856 KB Output is correct
20 Correct 72 ms 4960 KB Output is correct
21 Correct 134 ms 4956 KB Output is correct
22 Correct 139 ms 4904 KB Output is correct
23 Correct 141 ms 4948 KB Output is correct
24 Correct 130 ms 4900 KB Output is correct
25 Correct 136 ms 4936 KB Output is correct
26 Correct 144 ms 4972 KB Output is correct
27 Correct 139 ms 4940 KB Output is correct
28 Correct 129 ms 4936 KB Output is correct
29 Correct 136 ms 5004 KB Output is correct
30 Correct 144 ms 4988 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 1 ms 340 KB Output is correct
35 Correct 1 ms 212 KB Output is correct
36 Correct 1 ms 212 KB Output is correct
37 Correct 1 ms 212 KB Output is correct
38 Correct 0 ms 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 0 ms 340 KB Output is correct
41 Correct 0 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 340 KB Output is correct
52 Correct 2 ms 340 KB Output is correct
53 Correct 2 ms 340 KB Output is correct
54 Correct 2 ms 340 KB Output is correct
55 Correct 2 ms 340 KB Output is correct
56 Correct 2 ms 340 KB Output is correct
57 Correct 2 ms 340 KB Output is correct
58 Correct 2 ms 340 KB Output is correct
59 Correct 2 ms 340 KB Output is correct
60 Correct 2 ms 340 KB Output is correct
61 Correct 237 ms 4808 KB Output is correct
62 Correct 242 ms 5008 KB Output is correct
63 Correct 185 ms 4812 KB Output is correct
64 Correct 245 ms 4928 KB Output is correct
65 Correct 257 ms 4940 KB Output is correct
66 Correct 248 ms 4940 KB Output is correct
67 Correct 254 ms 4984 KB Output is correct
68 Correct 138 ms 4976 KB Output is correct
69 Correct 130 ms 4888 KB Output is correct
70 Correct 136 ms 4812 KB Output is correct