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답안 #998145

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
998145 2024-06-13T10:34:41 Z LOLOLO Feast (NOI19_feast) C++17
30 / 100
 228 ms 20820 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
 
#define           f     first
#define           s     second
#define           pb    push_back
#define           ep    emplace
#define           eb    emplace_back
#define           lb    lower_bound
#define           ub    upper_bound
#define       all(x)    x.begin(), x.end()
#define      rall(x)    x.rbegin(), x.rend()
#define   uniquev(v)    sort(all(v)), (v).resize(unique(all(v)) - (v).begin())
#define     mem(f,x)    memset(f , x , sizeof(f))
#define        sz(x)    (ll)(x).size()
#define  __lcm(a, b)    (1ll * ((a) / __gcd((a), (b))) * (b))
#define          mxx    *max_element
#define          mnn    *min_element
#define    cntbit(x)    __builtin_popcountll(x)
#define       len(x)    (int)(x.length())
 
const int N = 3e5 + 10;
int p[N], sz[N], l[N], r[N], a[N];
ll val[N];

set <pair <ll, ll>> st;

int get(int x) {
    return p[x] ? get(p[x]) : x;
}

void unite(int a, int b) {
    a = get(a), b = get(b);
    if (a == b)
        return;

    if (sz[a] < sz[b])
        swap(a, b);

    sz[a] += sz[b];
    p[b] = a;
    l[a] = min(l[a], l[b]);
    r[a] = max(r[a], r[b]);
    val[a] += val[b];
}

int main() {
    //ios_base::sync_with_stdio(0);
    //cin.tie(0);
    //cout.tie(0);

    int n, k;
    cin >> n >> k;

    for (int i = 1; i <= n; i++) {
        cin >> a[i];
        sz[i] = 1;
        l[i] = r[i] = i;
    }

    while (a[n] <= 0 && n)
        n--;

    if (n == 0) {
        cout << 0 << '\n';
        return 0;
    } 

    int ft = 1;
    while (a[ft] <= 0)
        ft++;

    for (int j = ft; j <= n; j++) 
        a[j - ft + 1] = a[j];

    for (int i = 1; i <= n; i++) {
        val[i] = a[i];
    }

    for (int i = 1; i < n; i++) {
        if ((a[i] >= 0) == (a[i + 1] >= 0))
            unite(i, i + 1);
    }

    for (int i = 1; i <= n; i++) {
        if (get(i) == i) {
            st.insert({abs(val[get(i)]), i});
        }
    }

    int ss = 1;
    while (sz(st) > k * 2) {
        auto it = *st.begin();
        st.erase(it);
        int p = it.s;

        if (l[p] > ss) {
            int x = get(l[p] - 1);
            st.erase({abs(val[x]), x});
            unite(p, x);
        }

        if (r[p] < n) {
            int x = get(r[p] + 1);
            st.erase({abs(val[x]), x});
            unite(p, x);
        }

        p = get(p);
        st.insert({abs(val[p]), p});

        while (val[get(n)] <= 0) {
            st.erase({abs(val[get(n)]), get(n)});
            n = l[get(n)] - 1;
        }

        while (val[get(ss)] <= 0) {
            st.erase({abs(val[get(ss)]), get(ss)});
            ss = r[get(ss)] + 1;
        }
    }

    ll ans = 0;
    while (sz(st)) {
        auto it = *st.begin();
        st.erase(it);
        int p = it.s;
        if (val[p] >= 0)
            ans += val[p];
    }

    cout << ans << '\n';
    return 0;

}

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 90 ms 11344 KB Output is correct
2 Correct 72 ms 11344 KB Output is correct
3 Correct 74 ms 11440 KB Output is correct
4 Correct 77 ms 11448 KB Output is correct
5 Correct 74 ms 11352 KB Output is correct
6 Correct 77 ms 11300 KB Output is correct
7 Correct 71 ms 11344 KB Output is correct
8 Correct 74 ms 11428 KB Output is correct
9 Correct 71 ms 11260 KB Output is correct
10 Correct 73 ms 11348 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 39 ms 9552 KB Output is correct
2 Correct 39 ms 9556 KB Output is correct
3 Correct 37 ms 9552 KB Output is correct
4 Correct 38 ms 9552 KB Output is correct
5 Correct 73 ms 11172 KB Output is correct
6 Correct 39 ms 9556 KB Output is correct
7 Correct 40 ms 9556 KB Output is correct
8 Correct 73 ms 11348 KB Output is correct
9 Correct 71 ms 11288 KB Output is correct
10 Correct 42 ms 9556 KB Output is correct

Subtask #3
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 197 ms 20772 KB Output is correct
2 Correct 203 ms 20560 KB Output is correct
3 Correct 192 ms 20820 KB Output is correct
4 Correct 212 ms 20664 KB Output is correct
5 Correct 192 ms 20780 KB Output is correct
6 Correct 195 ms 20720 KB Output is correct
7 Correct 228 ms 20764 KB Output is correct
8 Correct 192 ms 20816 KB Output is correct
9 Correct 189 ms 20808 KB Output is correct
10 Correct 195 ms 20816 KB Output is correct

Subtask #4
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Incorrect 1 ms 4444 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Incorrect 1 ms 4444 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Incorrect 1 ms 4444 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #7
0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 90 ms 11344 KB Output is correct
2 Correct 72 ms 11344 KB Output is correct
3 Correct 74 ms 11440 KB Output is correct
4 Correct 77 ms 11448 KB Output is correct
5 Correct 74 ms 11352 KB Output is correct
6 Correct 77 ms 11300 KB Output is correct
7 Correct 71 ms 11344 KB Output is correct
8 Correct 74 ms 11428 KB Output is correct
9 Correct 71 ms 11260 KB Output is correct
10 Correct 73 ms 11348 KB Output is correct
11 Correct 39 ms 9552 KB Output is correct
12 Correct 39 ms 9556 KB Output is correct
13 Correct 37 ms 9552 KB Output is correct
14 Correct 38 ms 9552 KB Output is correct
15 Correct 73 ms 11172 KB Output is correct
16 Correct 39 ms 9556 KB Output is correct
17 Correct 40 ms 9556 KB Output is correct
18 Correct 73 ms 11348 KB Output is correct
19 Correct 71 ms 11288 KB Output is correct
20 Correct 42 ms 9556 KB Output is correct
21 Correct 197 ms 20772 KB Output is correct
22 Correct 203 ms 20560 KB Output is correct
23 Correct 192 ms 20820 KB Output is correct
24 Correct 212 ms 20664 KB Output is correct
25 Correct 192 ms 20780 KB Output is correct
26 Correct 195 ms 20720 KB Output is correct
27 Correct 228 ms 20764 KB Output is correct
28 Correct 192 ms 20816 KB Output is correct
29 Correct 189 ms 20808 KB Output is correct
30 Correct 195 ms 20816 KB Output is correct
31 Correct 1 ms 4444 KB Output is correct
32 Incorrect 1 ms 4444 KB Output isn't correct
33 Halted 0 ms 0 KB -