oj.uz

Submission #248880

# Submission time Handle Problem Language Result Execution time Memory
248880 2020-07-13T16:11:45 Z SamAnd Feast (NOI19_feast) C++17
100 / 100
 834 ms 32248 KB 
#include <bits/stdc++.h>
using namespace std;
#define m_p make_pair
#define all(x) (x).begin(),(x).end()
#define sz(x) ((int)(x).size())
#define fi first
#define se second
typedef long long ll;
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());
mt19937 rnf(2106);
const int N = 1000006;

int n, k;
int a[N];

struct ban
{
    int x;
    ll s;
    ban(){}
    ban(int x, ll s)
    {
        this->x = x;
        this->s = s;
    }
};
bool operator<(const ban& a, const ban& b)
{
    if (abs(a.s) < abs(b.s))
        return true;
    if (abs(a.s) > abs(b.s))
        return false;
    return a.x < b.x;
}
int dq;
set<ban> t;

int p[N];
int l[N], r[N];
ll s[N];
int fi(int x)
{
    if (x == p[x])
        return x;
    return p[x] = fi(p[x]);
}
void kpc(int x, int y)
{
    x = fi(x);
    y = fi(y);

    t.erase(ban(x, s[x]));
    t.erase(ban(y, s[y]));
    if (s[x] > 0)
        --dq;
    if (s[y] > 0)
        --dq;
    p[x] = y;
    l[y] = min(l[x], l[y]);
    r[y] = max(r[x], r[y]);
    s[y] += s[x];
    if (s[y] > 0)
        ++dq;
    t.insert(ban(y, s[y]));
}

void solv()
{
    scanf("%d%d", &n, &k);
    for (int i = 1; i <= n; ++i)
        scanf("%d", &a[i]);

    for (int i = 1; i <= n; ++i)
    {
        p[i] = i;
        l[i] = r[i] = i;
        s[i] = a[i];
        t.insert(ban(i, s[i]));
        if (s[i] > 0)
            ++dq;
    }
    for (int i = 1; i <= n; ++i)
    {
        int x = fi(i);
        if (s[x] > 0 && r[x] < n && s[fi(r[x] + 1)] > 0)
        {
            kpc(x, r[x] + 1);
        }
        if (s[x] < 0 && r[x] < n && s[fi(r[x] + 1)] < 0)
        {
            kpc(x, r[x] + 1);
        }
    }

    while (dq > k)
    {
        int x = t.begin()->x;
        if (s[x] < 0)
        {
            if (l[x] == 1 || r[x] == n)
            {
                t.erase(ban(x, s[x]));
                continue;
            }
        }
        if (l[x] > 1)
        {
            kpc(x, l[x] - 1);
            x = fi(x);
        }
        if (r[x] < n)
        {
            kpc(x, r[x] + 1);
            x = fi(x);
        }
    }

    ll ans = 0;
    for (auto it = t.begin(); it != t.end(); ++it)
    {
        if (it->s > 0)
            ans += it->s;
    }
    printf("%lld\n", ans);
}

int main()
{
    #ifdef SOMETHING
    freopen("input.txt", "r", stdin);
    //freopen("output.txt", "w", stdout);
    #endif // SOMETHING
    solv();
    return 0;
}

//while ((double)clock() / CLOCKS_PER_SEC <= 0.9){}

Compilation message

feast.cpp: In function 'void solv()':
feast.cpp:69:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &k);
     ~~~~~^~~~~~~~~~~~~~~~
feast.cpp:71:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &a[i]);
         ~~~~~^~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 425 ms 28228 KB Output is correct
2 Correct 444 ms 28792 KB Output is correct
3 Correct 444 ms 29080 KB Output is correct
4 Correct 493 ms 28920 KB Output is correct
5 Correct 429 ms 28792 KB Output is correct
6 Correct 421 ms 28240 KB Output is correct
7 Correct 464 ms 28280 KB Output is correct
8 Correct 503 ms 28796 KB Output is correct
9 Correct 431 ms 28408 KB Output is correct
10 Correct 426 ms 28536 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 382 ms 26872 KB Output is correct
2 Correct 386 ms 27300 KB Output is correct
3 Correct 366 ms 26872 KB Output is correct
4 Correct 373 ms 26872 KB Output is correct
5 Correct 433 ms 31992 KB Output is correct
6 Correct 363 ms 26744 KB Output is correct
7 Correct 382 ms 27308 KB Output is correct
8 Correct 440 ms 32248 KB Output is correct
9 Correct 425 ms 29700 KB Output is correct
10 Correct 387 ms 27128 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 785 ms 29004 KB Output is correct
2 Correct 760 ms 28664 KB Output is correct
3 Correct 813 ms 28792 KB Output is correct
4 Correct 767 ms 28536 KB Output is correct
5 Correct 834 ms 28792 KB Output is correct
6 Correct 751 ms 29048 KB Output is correct
7 Correct 742 ms 29176 KB Output is correct
8 Correct 713 ms 28796 KB Output is correct
9 Correct 729 ms 29176 KB Output is correct
10 Correct 720 ms 29048 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct

Subtask #5
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 2 ms 512 KB Output is correct
22 Correct 2 ms 512 KB Output is correct
23 Correct 2 ms 512 KB Output is correct
24 Correct 2 ms 512 KB Output is correct
25 Correct 2 ms 512 KB Output is correct
26 Correct 2 ms 512 KB Output is correct
27 Correct 2 ms 512 KB Output is correct
28 Correct 2 ms 512 KB Output is correct
29 Correct 2 ms 512 KB Output is correct
30 Correct 2 ms 512 KB Output is correct

Subtask #7
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 425 ms 28228 KB Output is correct
2 Correct 444 ms 28792 KB Output is correct
3 Correct 444 ms 29080 KB Output is correct
4 Correct 493 ms 28920 KB Output is correct
5 Correct 429 ms 28792 KB Output is correct
6 Correct 421 ms 28240 KB Output is correct
7 Correct 464 ms 28280 KB Output is correct
8 Correct 503 ms 28796 KB Output is correct
9 Correct 431 ms 28408 KB Output is correct
10 Correct 426 ms 28536 KB Output is correct
11 Correct 382 ms 26872 KB Output is correct
12 Correct 386 ms 27300 KB Output is correct
13 Correct 366 ms 26872 KB Output is correct
14 Correct 373 ms 26872 KB Output is correct
15 Correct 433 ms 31992 KB Output is correct
16 Correct 363 ms 26744 KB Output is correct
17 Correct 382 ms 27308 KB Output is correct
18 Correct 440 ms 32248 KB Output is correct
19 Correct 425 ms 29700 KB Output is correct
20 Correct 387 ms 27128 KB Output is correct
21 Correct 785 ms 29004 KB Output is correct
22 Correct 760 ms 28664 KB Output is correct
23 Correct 813 ms 28792 KB Output is correct
24 Correct 767 ms 28536 KB Output is correct
25 Correct 834 ms 28792 KB Output is correct
26 Correct 751 ms 29048 KB Output is correct
27 Correct 742 ms 29176 KB Output is correct
28 Correct 713 ms 28796 KB Output is correct
29 Correct 729 ms 29176 KB Output is correct
30 Correct 720 ms 29048 KB Output is correct
31 Correct 0 ms 384 KB Output is correct
32 Correct 0 ms 384 KB Output is correct
33 Correct 0 ms 384 KB Output is correct
34 Correct 0 ms 384 KB Output is correct
35 Correct 0 ms 384 KB Output is correct
36 Correct 0 ms 384 KB Output is correct
37 Correct 0 ms 384 KB Output is correct
38 Correct 0 ms 384 KB Output is correct
39 Correct 0 ms 384 KB Output is correct
40 Correct 1 ms 384 KB Output is correct
41 Correct 1 ms 384 KB Output is correct
42 Correct 1 ms 384 KB Output is correct
43 Correct 1 ms 384 KB Output is correct
44 Correct 1 ms 384 KB Output is correct
45 Correct 1 ms 384 KB Output is correct
46 Correct 1 ms 384 KB Output is correct
47 Correct 1 ms 384 KB Output is correct
48 Correct 1 ms 384 KB Output is correct
49 Correct 1 ms 384 KB Output is correct
50 Correct 1 ms 384 KB Output is correct
51 Correct 2 ms 512 KB Output is correct
52 Correct 2 ms 512 KB Output is correct
53 Correct 2 ms 512 KB Output is correct
54 Correct 2 ms 512 KB Output is correct
55 Correct 2 ms 512 KB Output is correct
56 Correct 2 ms 512 KB Output is correct
57 Correct 2 ms 512 KB Output is correct
58 Correct 2 ms 512 KB Output is correct
59 Correct 2 ms 512 KB Output is correct
60 Correct 2 ms 512 KB Output is correct
61 Correct 612 ms 28536 KB Output is correct
62 Correct 540 ms 29176 KB Output is correct
63 Correct 711 ms 28536 KB Output is correct
64 Correct 608 ms 29176 KB Output is correct
65 Correct 648 ms 29176 KB Output is correct
66 Correct 661 ms 29048 KB Output is correct
67 Correct 646 ms 28536 KB Output is correct
68 Correct 721 ms 29176 KB Output is correct
69 Correct 713 ms 28664 KB Output is correct
70 Correct 799 ms 28392 KB Output is correct