oj.uz

Submission #831404

# Submission time Handle Problem Language Result Execution time Memory
831404 2023-08-20T08:29:55 Z BamshooT Feast (NOI19_feast) C++14
100 / 100
 125 ms 12752 KB 
#include <iostream>

#define ll long long
#define FOR(i, a, b) for (int i = (a); i <= (b); ++i)
#define fi first
#define se second
#define inf 1e18

using namespace std;

typedef pair<ll, int> li;

const int N = 3e5 + 9;
int n, k;
ll pre[N], a[N], ans;
li dp[N];

void maximize(li &a, li b){
    if (a.fi < b.fi) a = b;
    if (a.fi == b.fi) a = max(a, b);
}

li calc(ll cost){
    //FOR(i, 1, n) dp[i] = {pre[i] - cost, 1};
    li best = {0, 0};
    for (int i = 1; i <= n; ++i) {
        dp[i] = dp[i-1];
        maximize(dp[i], {pre[i] + best.fi - cost, best.se + 1});
        maximize(best, {dp[i].fi - pre[i], dp[i].se});

    }
    return dp[n];
}

int main(){
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
   // freopen("nhap.inp", "r", stdin);
   // freopen("xuat.out", "w", stdout);
    cin >> n >> k;
    FOR(i, 1, n) cin >> a[i], pre[i] = pre[i-1] + a[i];
    ll lo = -1e15, hi = 1e15;
    while (lo <= hi) {
        ll mid = lo + hi >> 1;
        li tmp = calc(mid);
        if (tmp.se <= k) {
            ans = max(ans, tmp.fi + tmp.se*mid);
            hi = mid - 1;
        } else lo = mid + 1;
    }
    cout << ans;
    return 0;
}

Compilation message

feast.cpp: In function 'int main()':
feast.cpp:43:21: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   43 |         ll mid = lo + hi >> 1;
      |                  ~~~^~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 62 ms 12108 KB Output is correct
2 Correct 63 ms 12396 KB Output is correct
3 Correct 65 ms 12572 KB Output is correct
4 Correct 62 ms 12408 KB Output is correct
5 Correct 62 ms 12424 KB Output is correct
6 Correct 63 ms 12216 KB Output is correct
7 Correct 62 ms 12216 KB Output is correct
8 Correct 63 ms 12424 KB Output is correct
9 Correct 64 ms 12168 KB Output is correct
10 Correct 80 ms 12364 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 52 ms 10576 KB Output is correct
2 Correct 54 ms 10824 KB Output is correct
3 Correct 57 ms 10580 KB Output is correct
4 Correct 53 ms 10656 KB Output is correct
5 Correct 63 ms 12172 KB Output is correct
6 Correct 52 ms 10568 KB Output is correct
7 Correct 52 ms 10832 KB Output is correct
8 Correct 64 ms 12512 KB Output is correct
9 Correct 63 ms 12108 KB Output is correct
10 Correct 52 ms 10760 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 77 ms 12616 KB Output is correct
2 Correct 81 ms 12464 KB Output is correct
3 Correct 77 ms 12580 KB Output is correct
4 Correct 76 ms 12460 KB Output is correct
5 Correct 76 ms 12488 KB Output is correct
6 Correct 76 ms 12656 KB Output is correct
7 Correct 77 ms 12612 KB Output is correct
8 Correct 75 ms 12580 KB Output is correct
9 Correct 86 ms 12732 KB Output is correct
10 Correct 92 ms 12680 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 0 ms 324 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 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 328 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 328 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 0 ms 324 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 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 328 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 328 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 0 ms 340 KB Output is correct
17 Correct 0 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 0 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 0 ms 324 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 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 328 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 328 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 0 ms 340 KB Output is correct
17 Correct 0 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 0 ms 340 KB Output is correct
21 Correct 1 ms 376 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 372 KB Output is correct
28 Correct 1 ms 372 KB Output is correct
29 Correct 1 ms 340 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 62 ms 12108 KB Output is correct
2 Correct 63 ms 12396 KB Output is correct
3 Correct 65 ms 12572 KB Output is correct
4 Correct 62 ms 12408 KB Output is correct
5 Correct 62 ms 12424 KB Output is correct
6 Correct 63 ms 12216 KB Output is correct
7 Correct 62 ms 12216 KB Output is correct
8 Correct 63 ms 12424 KB Output is correct
9 Correct 64 ms 12168 KB Output is correct
10 Correct 80 ms 12364 KB Output is correct
11 Correct 52 ms 10576 KB Output is correct
12 Correct 54 ms 10824 KB Output is correct
13 Correct 57 ms 10580 KB Output is correct
14 Correct 53 ms 10656 KB Output is correct
15 Correct 63 ms 12172 KB Output is correct
16 Correct 52 ms 10568 KB Output is correct
17 Correct 52 ms 10832 KB Output is correct
18 Correct 64 ms 12512 KB Output is correct
19 Correct 63 ms 12108 KB Output is correct
20 Correct 52 ms 10760 KB Output is correct
21 Correct 77 ms 12616 KB Output is correct
22 Correct 81 ms 12464 KB Output is correct
23 Correct 77 ms 12580 KB Output is correct
24 Correct 76 ms 12460 KB Output is correct
25 Correct 76 ms 12488 KB Output is correct
26 Correct 76 ms 12656 KB Output is correct
27 Correct 77 ms 12612 KB Output is correct
28 Correct 75 ms 12580 KB Output is correct
29 Correct 86 ms 12732 KB Output is correct
30 Correct 92 ms 12680 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 0 ms 324 KB Output is correct
33 Correct 1 ms 340 KB Output is correct
34 Correct 0 ms 340 KB Output is correct
35 Correct 1 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 328 KB Output is correct
39 Correct 0 ms 340 KB Output is correct
40 Correct 1 ms 328 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 0 ms 340 KB Output is correct
47 Correct 0 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 0 ms 340 KB Output is correct
51 Correct 1 ms 376 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 372 KB Output is correct
58 Correct 1 ms 372 KB Output is correct
59 Correct 1 ms 340 KB Output is correct
60 Correct 1 ms 340 KB Output is correct
61 Correct 125 ms 12396 KB Output is correct
62 Correct 103 ms 12752 KB Output is correct
63 Correct 89 ms 12412 KB Output is correct
64 Correct 105 ms 12664 KB Output is correct
65 Correct 108 ms 12644 KB Output is correct
66 Correct 105 ms 12616 KB Output is correct
67 Correct 105 ms 12432 KB Output is correct
68 Correct 77 ms 12616 KB Output is correct
69 Correct 77 ms 12364 KB Output is correct
70 Correct 75 ms 12364 KB Output is correct