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Submission #1098050

# Submission time Handle Problem Language Result Execution time Memory
1098050 2024-10-09T01:28:21 Z nngan267 Feast (NOI19_feast) C++17
100 / 100
 125 ms 14160 KB 
#include<bits/stdc++.h>
using namespace std;

#define ll long long
#define ii pair<int, int>
#define fi first
#define se second
#define pll pair<ll, ll>
#define db long double
#define plll pair<ll, pll>

const int maxn = 4e5+5;
const ll mod = 1e9+7;
const int iinf = 1e9+7;
const ll inf = 1e18+7;
const double eps = 1e-9;
const db pi = acos(-1);

int n, k;
int a[maxn];

void inp(){
    cin >> n >> k;
    for(int i=1; i<=n; i++){
        cin >> a[i];
    }
}

pll d[maxn][2];

pll check(ll lmb){
    d[1][0] = {0, 0};
    d[1][1] = {a[1] - lmb, 1};
    for(int i=2; i<=n; i++){
        d[i][0] = max(d[i-1][0], d[i-1][1]);
        d[i][1] = max(make_pair(d[i-1][0].fi + a[i] - lmb, d[i-1][0].se + 1),
                      make_pair(d[i-1][1].fi + a[i], d[i-1][1].se));
    }
    return max({d[n][0], d[n][1]});
}

void solve(){
    ll l = 0, r = inf;
    ll res = 0;
    while(l <= r){
        ll mid = (l+r)/2;
        if(check(mid).se >= k){
            res = mid;
            l = mid + 1;
        }
        else r = mid - 1;
    }
    cout << check(res).fi + res * k << "\n";
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    int test = 1;
//    cin >> test;
    while(test--){
        inp();
        solve();
    }
    cerr << "\nTime elapsed: " << (1.0 * clock() / CLOCKS_PER_SEC) << "s.\n";
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 52 ms 13404 KB Output is correct
2 Correct 75 ms 13648 KB Output is correct
3 Correct 57 ms 13640 KB Output is correct
4 Correct 59 ms 13648 KB Output is correct
5 Correct 59 ms 13648 KB Output is correct
6 Correct 54 ms 13428 KB Output is correct
7 Correct 55 ms 13400 KB Output is correct
8 Correct 54 ms 13608 KB Output is correct
9 Correct 54 ms 13400 KB Output is correct
10 Correct 55 ms 13452 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 60 ms 11856 KB Output is correct
2 Correct 56 ms 12124 KB Output is correct
3 Correct 45 ms 11868 KB Output is correct
4 Correct 46 ms 11864 KB Output is correct
5 Correct 51 ms 13396 KB Output is correct
6 Correct 49 ms 11864 KB Output is correct
7 Correct 49 ms 11996 KB Output is correct
8 Correct 55 ms 13580 KB Output is correct
9 Correct 51 ms 13392 KB Output is correct
10 Correct 47 ms 11868 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 80 ms 13916 KB Output is correct
2 Correct 89 ms 13660 KB Output is correct
3 Correct 78 ms 13908 KB Output is correct
4 Correct 77 ms 13660 KB Output is correct
5 Correct 81 ms 13648 KB Output is correct
6 Correct 80 ms 13952 KB Output is correct
7 Correct 77 ms 13864 KB Output is correct
8 Correct 76 ms 13872 KB Output is correct
9 Correct 80 ms 13832 KB Output is correct
10 Correct 79 ms 13904 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct

Subtask #5
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 480 KB Output is correct
20 Correct 0 ms 348 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 480 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 1 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 500 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct

Subtask #7
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 52 ms 13404 KB Output is correct
2 Correct 75 ms 13648 KB Output is correct
3 Correct 57 ms 13640 KB Output is correct
4 Correct 59 ms 13648 KB Output is correct
5 Correct 59 ms 13648 KB Output is correct
6 Correct 54 ms 13428 KB Output is correct
7 Correct 55 ms 13400 KB Output is correct
8 Correct 54 ms 13608 KB Output is correct
9 Correct 54 ms 13400 KB Output is correct
10 Correct 55 ms 13452 KB Output is correct
11 Correct 60 ms 11856 KB Output is correct
12 Correct 56 ms 12124 KB Output is correct
13 Correct 45 ms 11868 KB Output is correct
14 Correct 46 ms 11864 KB Output is correct
15 Correct 51 ms 13396 KB Output is correct
16 Correct 49 ms 11864 KB Output is correct
17 Correct 49 ms 11996 KB Output is correct
18 Correct 55 ms 13580 KB Output is correct
19 Correct 51 ms 13392 KB Output is correct
20 Correct 47 ms 11868 KB Output is correct
21 Correct 80 ms 13916 KB Output is correct
22 Correct 89 ms 13660 KB Output is correct
23 Correct 78 ms 13908 KB Output is correct
24 Correct 77 ms 13660 KB Output is correct
25 Correct 81 ms 13648 KB Output is correct
26 Correct 80 ms 13952 KB Output is correct
27 Correct 77 ms 13864 KB Output is correct
28 Correct 76 ms 13872 KB Output is correct
29 Correct 80 ms 13832 KB Output is correct
30 Correct 79 ms 13904 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 1 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 1 ms 348 KB Output is correct
41 Correct 0 ms 348 KB Output is correct
42 Correct 0 ms 348 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 1 ms 348 KB Output is correct
45 Correct 0 ms 348 KB Output is correct
46 Correct 0 ms 348 KB Output is correct
47 Correct 1 ms 344 KB Output is correct
48 Correct 1 ms 348 KB Output is correct
49 Correct 1 ms 480 KB Output is correct
50 Correct 0 ms 348 KB Output is correct
51 Correct 1 ms 344 KB Output is correct
52 Correct 1 ms 348 KB Output is correct
53 Correct 1 ms 348 KB Output is correct
54 Correct 1 ms 348 KB Output is correct
55 Correct 1 ms 348 KB Output is correct
56 Correct 1 ms 344 KB Output is correct
57 Correct 1 ms 348 KB Output is correct
58 Correct 1 ms 500 KB Output is correct
59 Correct 1 ms 348 KB Output is correct
60 Correct 1 ms 348 KB Output is correct
61 Correct 110 ms 13516 KB Output is correct
62 Correct 111 ms 14160 KB Output is correct
63 Correct 96 ms 13648 KB Output is correct
64 Correct 115 ms 13904 KB Output is correct
65 Correct 116 ms 13908 KB Output is correct
66 Correct 125 ms 13996 KB Output is correct
67 Correct 115 ms 13648 KB Output is correct
68 Correct 79 ms 13916 KB Output is correct
69 Correct 78 ms 13652 KB Output is correct
70 Correct 76 ms 13396 KB Output is correct