oj.uz

Submission #791855

# Submission time Handle Problem Language Result Execution time Memory
791855 2023-07-24T11:27:28 Z anhduc2701 Feast (NOI19_feast) C++17
100 / 100
 107 ms 11784 KB 
/*
#pragma GCC optimize("Ofast")
#pragma GCC target("avx,avx2,fma")
#pragma GCC optimize("unroll-loops")
*/
#include <bits/stdc++.h>
using namespace std;
#define all(x) x.begin(), x.end()
#define len(x) ll(x.size())
#define eb emplace_back
#define PI acos(-1.0)
#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define MIN(v) *min_element(all(v))
#define MAX(v) *max_element(all(v))
#define BIT(x, i) (1 & ((x) >> (i)))
#define MASK(x) (1LL << (x))
#define task "tnc"
#define rep(i, n) for (int i = 0; i < (n); i++)
#define rep1(i, n) for (int i = 1; i <= (n); i++)
typedef long long ll;
typedef long double ld;
const ll INF = 1e14;
const int maxn = 1e6 + 5;
const int mod = 1e9 + 7;
const int mo = 998244353;
using pi = pair<ll, ll>;
using vi = vector<ll>;
using pii = pair<pair<ll, ll>, ll>;
mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
ll n, k;
ll a[maxn];
ll dp[maxn];
ll trace[maxn];
ll pre[maxn];
ll f(ll mid)
{
    // dp[i] = max(dp[i-1],dp[j]+dp[i]-pre[j]+pre[i]-mid);
    dp[0] = 0;
    ll ma = 0;
    ll vt = 0;
    trace[0] = 0;
    for (int i = 1; i <= n; i++)
    {
        dp[i] = 0;
        trace[i] = 0;
    }

    for (int i = 1; i <= n; i++)
    {

        if (dp[i - 1] <= ma + pre[i] - mid)
        {
            dp[i] = ma + pre[i] - mid;
            trace[i] = trace[vt] + 1;
        }
        else
        {
            dp[i] = dp[i - 1];
            trace[i] = trace[i - 1];
        }
        if (ma <= dp[i] - pre[i])
        {
            ma = dp[i] - pre[i];
            vt = i;
        }
    }
    return trace[n];
}
void solve()
{
    cin >> n >> k;
    for (int i = 1; i <= n; i++)
    {
        cin >> a[i];
        pre[i] = pre[i - 1] + a[i];
    }
    ll l = -INF;
    ll r = INF;
    ll ans;
    ll ans1;

    while (l <= r)
    {
        ll mid = (l + r) / 2;
        if (f(mid) >= k)
        {
            ans = dp[n];
            ans1 = mid;
            l = mid + 1;
        }
        else
        {
            r = mid - 1;
        }
    }

    if (ans1 <= 0)
    {

        f(0);
        cout << dp[n];
    }
    else
    {
        cout << ans + ans1 * k;
    }
}
signed main()
{
    cin.tie(0), cout.tie(0)->sync_with_stdio(0);

    solve();
}

Compilation message

feast.cpp: In function 'void solve()':
feast.cpp:108:28: warning: 'ans1' may be used uninitialized in this function [-Wmaybe-uninitialized]
  108 |         cout << ans + ans1 * k;
      |                       ~~~~~^~~
feast.cpp:108:30: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
  108 |         cout << ans + ans1 * k;
      |                              ^

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 52 ms 9404 KB Output is correct
2 Correct 47 ms 9620 KB Output is correct
3 Correct 48 ms 9716 KB Output is correct
4 Correct 52 ms 9668 KB Output is correct
5 Correct 47 ms 9608 KB Output is correct
6 Correct 46 ms 9428 KB Output is correct
7 Correct 46 ms 9420 KB Output is correct
8 Correct 46 ms 9564 KB Output is correct
9 Correct 46 ms 9472 KB Output is correct
10 Correct 51 ms 9556 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 52 ms 9524 KB Output is correct
2 Correct 54 ms 9716 KB Output is correct
3 Correct 55 ms 9504 KB Output is correct
4 Correct 46 ms 9508 KB Output is correct
5 Correct 61 ms 11564 KB Output is correct
6 Correct 57 ms 10520 KB Output is correct
7 Correct 46 ms 10876 KB Output is correct
8 Correct 58 ms 11696 KB Output is correct
9 Correct 58 ms 11480 KB Output is correct
10 Correct 50 ms 10888 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 71 ms 9516 KB Output is correct
2 Correct 69 ms 9464 KB Output is correct
3 Correct 69 ms 9600 KB Output is correct
4 Correct 68 ms 9428 KB Output is correct
5 Correct 69 ms 9588 KB Output is correct
6 Correct 70 ms 9544 KB Output is correct
7 Correct 70 ms 9684 KB Output is correct
8 Correct 70 ms 9600 KB Output is correct
9 Correct 71 ms 9716 KB Output is correct
10 Correct 78 ms 9692 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 0 ms 340 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 340 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 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 0 ms 340 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 340 KB Output is correct
10 Correct 1 ms 340 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 336 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 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 0 ms 340 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 340 KB Output is correct
10 Correct 1 ms 340 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 336 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 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 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 52 ms 9404 KB Output is correct
2 Correct 47 ms 9620 KB Output is correct
3 Correct 48 ms 9716 KB Output is correct
4 Correct 52 ms 9668 KB Output is correct
5 Correct 47 ms 9608 KB Output is correct
6 Correct 46 ms 9428 KB Output is correct
7 Correct 46 ms 9420 KB Output is correct
8 Correct 46 ms 9564 KB Output is correct
9 Correct 46 ms 9472 KB Output is correct
10 Correct 51 ms 9556 KB Output is correct
11 Correct 52 ms 9524 KB Output is correct
12 Correct 54 ms 9716 KB Output is correct
13 Correct 55 ms 9504 KB Output is correct
14 Correct 46 ms 9508 KB Output is correct
15 Correct 61 ms 11564 KB Output is correct
16 Correct 57 ms 10520 KB Output is correct
17 Correct 46 ms 10876 KB Output is correct
18 Correct 58 ms 11696 KB Output is correct
19 Correct 58 ms 11480 KB Output is correct
20 Correct 50 ms 10888 KB Output is correct
21 Correct 71 ms 9516 KB Output is correct
22 Correct 69 ms 9464 KB Output is correct
23 Correct 69 ms 9600 KB Output is correct
24 Correct 68 ms 9428 KB Output is correct
25 Correct 69 ms 9588 KB Output is correct
26 Correct 70 ms 9544 KB Output is correct
27 Correct 70 ms 9684 KB Output is correct
28 Correct 70 ms 9600 KB Output is correct
29 Correct 71 ms 9716 KB Output is correct
30 Correct 78 ms 9692 KB Output is correct
31 Correct 0 ms 340 KB Output is correct
32 Correct 0 ms 340 KB Output is correct
33 Correct 1 ms 332 KB Output is correct
34 Correct 0 ms 332 KB Output is correct
35 Correct 1 ms 340 KB Output is correct
36 Correct 0 ms 340 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 340 KB Output is correct
40 Correct 1 ms 340 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 336 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 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 340 KB Output is correct
60 Correct 1 ms 340 KB Output is correct
61 Correct 107 ms 11524 KB Output is correct
62 Correct 106 ms 11784 KB Output is correct
63 Correct 84 ms 11424 KB Output is correct
64 Correct 107 ms 11584 KB Output is correct
65 Correct 104 ms 11704 KB Output is correct
66 Correct 103 ms 11560 KB Output is correct
67 Correct 102 ms 11504 KB Output is correct
68 Correct 74 ms 11592 KB Output is correct
69 Correct 75 ms 11532 KB Output is correct
70 Correct 72 ms 11480 KB Output is correct