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Submission #731508

# Submission time Handle Problem Language Result Execution time Memory
731508 2023-04-27T13:38:42 Z mohav48173 Feast (NOI19_feast) C++14
100 / 100
 278 ms 8068 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=1e18;
    while((r-l)>(long double)(1e-7)) {
        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 84 ms 4772 KB Output is correct
2 Correct 92 ms 4928 KB Output is correct
3 Correct 92 ms 5004 KB Output is correct
4 Correct 109 ms 4976 KB Output is correct
5 Correct 89 ms 4948 KB Output is correct
6 Correct 91 ms 4868 KB Output is correct
7 Correct 90 ms 4820 KB Output is correct
8 Correct 88 ms 4960 KB Output is correct
9 Correct 91 ms 4852 KB Output is correct
10 Correct 90 ms 4812 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 85 ms 4904 KB Output is correct
2 Correct 78 ms 5004 KB Output is correct
3 Correct 76 ms 4888 KB Output is correct
4 Correct 81 ms 4864 KB Output is correct
5 Correct 84 ms 5008 KB Output is correct
6 Correct 73 ms 4888 KB Output is correct
7 Correct 80 ms 5016 KB Output is correct
8 Correct 90 ms 4988 KB Output is correct
9 Correct 84 ms 4812 KB Output is correct
10 Correct 78 ms 4984 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 147 ms 4952 KB Output is correct
2 Correct 153 ms 4900 KB Output is correct
3 Correct 148 ms 4948 KB Output is correct
4 Correct 148 ms 4900 KB Output is correct
5 Correct 150 ms 4944 KB Output is correct
6 Correct 149 ms 4972 KB Output is correct
7 Correct 162 ms 4996 KB Output is correct
8 Correct 150 ms 4996 KB Output is correct
9 Correct 150 ms 5000 KB Output is correct
10 Correct 150 ms 4896 KB Output is correct

Subtask #4
10.0 / 10.0

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

Subtask #5
11.0 / 11.0

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

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 212 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 368 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 84 ms 4772 KB Output is correct
2 Correct 92 ms 4928 KB Output is correct
3 Correct 92 ms 5004 KB Output is correct
4 Correct 109 ms 4976 KB Output is correct
5 Correct 89 ms 4948 KB Output is correct
6 Correct 91 ms 4868 KB Output is correct
7 Correct 90 ms 4820 KB Output is correct
8 Correct 88 ms 4960 KB Output is correct
9 Correct 91 ms 4852 KB Output is correct
10 Correct 90 ms 4812 KB Output is correct
11 Correct 85 ms 4904 KB Output is correct
12 Correct 78 ms 5004 KB Output is correct
13 Correct 76 ms 4888 KB Output is correct
14 Correct 81 ms 4864 KB Output is correct
15 Correct 84 ms 5008 KB Output is correct
16 Correct 73 ms 4888 KB Output is correct
17 Correct 80 ms 5016 KB Output is correct
18 Correct 90 ms 4988 KB Output is correct
19 Correct 84 ms 4812 KB Output is correct
20 Correct 78 ms 4984 KB Output is correct
21 Correct 147 ms 4952 KB Output is correct
22 Correct 153 ms 4900 KB Output is correct
23 Correct 148 ms 4948 KB Output is correct
24 Correct 148 ms 4900 KB Output is correct
25 Correct 150 ms 4944 KB Output is correct
26 Correct 149 ms 4972 KB Output is correct
27 Correct 162 ms 4996 KB Output is correct
28 Correct 150 ms 4996 KB Output is correct
29 Correct 150 ms 5000 KB Output is correct
30 Correct 150 ms 4896 KB Output is correct
31 Correct 1 ms 212 KB Output is correct
32 Correct 0 ms 340 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 0 ms 212 KB Output is correct
35 Correct 0 ms 212 KB Output is correct
36 Correct 1 ms 212 KB Output is correct
37 Correct 1 ms 340 KB Output is correct
38 Correct 0 ms 340 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 0 ms 212 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 368 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 268 ms 7936 KB Output is correct
62 Correct 258 ms 8068 KB Output is correct
63 Correct 213 ms 7856 KB Output is correct
64 Correct 262 ms 8004 KB Output is correct
65 Correct 277 ms 8004 KB Output is correct
66 Correct 278 ms 7868 KB Output is correct
67 Correct 269 ms 7760 KB Output is correct
68 Correct 169 ms 8012 KB Output is correct
69 Correct 152 ms 7956 KB Output is correct
70 Correct 146 ms 7820 KB Output is correct