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Submission #776315

# Submission time Handle Problem Language Result Execution time Memory
776315 2023-07-07T16:15:28 Z ttamx Feast (NOI19_feast) C++14
100 / 100
 108 ms 8064 KB 
#include<bits/stdc++.h>

using namespace std;

typedef long long ll;

const int N=3e5+5;

int n,k;
ll a[N],qs[N];

pair<ll,int> calc(ll cost){
    pair<ll,int> dp(0,0),best(0,0);
    for(int i=1;i<=n;i++){
        dp=max(dp,{qs[i]-cost+best.first,best.second-1});
        best=max(best,{dp.first-qs[i],dp.second});
    }
    dp.second*=-1;
    return dp;
}

int main(){
    cin.tie(nullptr)->sync_with_stdio(false);
    cin >> n >> k;
    for(int i=1;i<=n;i++)cin >> a[i];
    for(int i=1;i<=n;i++)qs[i]=qs[i-1]+a[i];
    ll l=0,r=3e14,ans=0;
    while(l<r){
        ll m=(l+r)/2;
        auto [val,cnt]=calc(m);
        if(cnt<=k)r=m,ans=val+cnt*m;
        else l=m+1;
    }
    cout << ans;
}

Compilation message

feast.cpp: In function 'int main()':
feast.cpp:30:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   30 |         auto [val,cnt]=calc(m);
      |              ^

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 7628 KB Output is correct
2 Correct 45 ms 7888 KB Output is correct
3 Correct 40 ms 7844 KB Output is correct
4 Correct 39 ms 7816 KB Output is correct
5 Correct 39 ms 7756 KB Output is correct
6 Correct 38 ms 7580 KB Output is correct
7 Correct 39 ms 7556 KB Output is correct
8 Correct 39 ms 7800 KB Output is correct
9 Correct 39 ms 7660 KB Output is correct
10 Correct 42 ms 7868 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 43 ms 6016 KB Output is correct
2 Correct 43 ms 6032 KB Output is correct
3 Correct 38 ms 6008 KB Output is correct
4 Correct 37 ms 6060 KB Output is correct
5 Correct 39 ms 7576 KB Output is correct
6 Correct 36 ms 5932 KB Output is correct
7 Correct 37 ms 6096 KB Output is correct
8 Correct 41 ms 7852 KB Output is correct
9 Correct 43 ms 7780 KB Output is correct
10 Correct 37 ms 6092 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 67 ms 7984 KB Output is correct
2 Correct 66 ms 7896 KB Output is correct
3 Correct 66 ms 7956 KB Output is correct
4 Correct 67 ms 7880 KB Output is correct
5 Correct 70 ms 7960 KB Output is correct
6 Correct 66 ms 8008 KB Output is correct
7 Correct 66 ms 8016 KB Output is correct
8 Correct 65 ms 7928 KB Output is correct
9 Correct 66 ms 8064 KB Output is correct
10 Correct 67 ms 8012 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 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 324 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 224 KB Output is correct
10 Correct 1 ms 340 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 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 324 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 224 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 328 KB Output is correct
13 Correct 1 ms 328 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 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 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 324 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 224 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 328 KB Output is correct
13 Correct 1 ms 328 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 344 KB Output is correct
30 Correct 1 ms 340 KB Output is correct

Subtask #7
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 7628 KB Output is correct
2 Correct 45 ms 7888 KB Output is correct
3 Correct 40 ms 7844 KB Output is correct
4 Correct 39 ms 7816 KB Output is correct
5 Correct 39 ms 7756 KB Output is correct
6 Correct 38 ms 7580 KB Output is correct
7 Correct 39 ms 7556 KB Output is correct
8 Correct 39 ms 7800 KB Output is correct
9 Correct 39 ms 7660 KB Output is correct
10 Correct 42 ms 7868 KB Output is correct
11 Correct 43 ms 6016 KB Output is correct
12 Correct 43 ms 6032 KB Output is correct
13 Correct 38 ms 6008 KB Output is correct
14 Correct 37 ms 6060 KB Output is correct
15 Correct 39 ms 7576 KB Output is correct
16 Correct 36 ms 5932 KB Output is correct
17 Correct 37 ms 6096 KB Output is correct
18 Correct 41 ms 7852 KB Output is correct
19 Correct 43 ms 7780 KB Output is correct
20 Correct 37 ms 6092 KB Output is correct
21 Correct 67 ms 7984 KB Output is correct
22 Correct 66 ms 7896 KB Output is correct
23 Correct 66 ms 7956 KB Output is correct
24 Correct 67 ms 7880 KB Output is correct
25 Correct 70 ms 7960 KB Output is correct
26 Correct 66 ms 8008 KB Output is correct
27 Correct 66 ms 8016 KB Output is correct
28 Correct 65 ms 7928 KB Output is correct
29 Correct 66 ms 8064 KB Output is correct
30 Correct 67 ms 8012 KB Output is correct
31 Correct 1 ms 212 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 0 ms 212 KB Output is correct
35 Correct 1 ms 212 KB Output is correct
36 Correct 0 ms 324 KB Output is correct
37 Correct 0 ms 212 KB Output is correct
38 Correct 0 ms 212 KB Output is correct
39 Correct 1 ms 224 KB Output is correct
40 Correct 1 ms 340 KB Output is correct
41 Correct 1 ms 340 KB Output is correct
42 Correct 0 ms 328 KB Output is correct
43 Correct 1 ms 328 KB Output is correct
44 Correct 1 ms 212 KB Output is correct
45 Correct 1 ms 332 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 1 ms 212 KB Output is correct
48 Correct 1 ms 340 KB Output is correct
49 Correct 1 ms 212 KB Output is correct
50 Correct 1 ms 212 KB Output is correct
51 Correct 1 ms 340 KB Output is correct
52 Correct 1 ms 340 KB Output is correct
53 Correct 1 ms 340 KB Output is correct
54 Correct 1 ms 340 KB Output is correct
55 Correct 1 ms 340 KB Output is correct
56 Correct 1 ms 340 KB Output is correct
57 Correct 1 ms 340 KB Output is correct
58 Correct 1 ms 340 KB Output is correct
59 Correct 1 ms 344 KB Output is correct
60 Correct 1 ms 340 KB Output is correct
61 Correct 89 ms 7936 KB Output is correct
62 Correct 89 ms 8064 KB Output is correct
63 Correct 76 ms 7756 KB Output is correct
64 Correct 92 ms 7920 KB Output is correct
65 Correct 96 ms 8000 KB Output is correct
66 Correct 108 ms 7984 KB Output is correct
67 Correct 92 ms 7760 KB Output is correct
68 Correct 67 ms 7928 KB Output is correct
69 Correct 73 ms 7872 KB Output is correct
70 Correct 64 ms 7784 KB Output is correct