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답안 #810324

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
810324 2023-08-06T08:27:56 Z vuavisao Feast (NOI19_feast) C++17
100 / 100
 81 ms 12152 KB 
#include<bits/stdc++.h>
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#define ll long long
using namespace std;

const ll N = 3e5 + 10;
const ll INF = 1e18;

struct dsu {
    ll n = 0;
    vector<ll> parent = {};
    
    void resize(ll _n) {
        n = _n; 
        parent.resize(n + 10); for(ll i = 1; i <= n; ++ i) parent[i] = i;
    }
    dsu() {};
    dsu(ll _n) { this -> resize(_n); };

    ll ancestor(ll u) {
        if(parent[u] == u) return u;
        return parent[u] = ancestor(parent[u]);
    }

    bool join(ll u, ll v) {
        u = ancestor(u); v = ancestor(v);
        if(u == v) return false;
        parent[v] = u;
        return true;
    }
};

struct state {
    ll val = 0, idx = 0;
    state() {};
    state(ll _val, ll _idx) : val(_val), idx(_idx) {}; 

    bool operator < (const state& other) const {
        return abs(this -> val) > abs(other.val);
    }
};

ll n, k;
ll a[N];

ll nxt[N];
ll res;

int32_t main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr); cout.tie(nullptr);
    cin >> n >> k;
    for(ll i = 1; i <= n; ++ i) cin >> a[i];
    vector<ll> List = {};
    for(ll i = 1, j = 1; i <= n; i = j) {
        ll s = 0;
        while(j <= n && a[i] * a[j] >= 0) {
            s += a[j];
            ++ j;
        }
        // cout << s << '\n';
        List.push_back(s);
    }
    if(!List.empty() && List.back() < 0) List.pop_back();
    if(!List.empty() && List.front() < 0) {
        reverse(List.begin(), List.end());
        List.pop_back();
    }
    n = (ll) List.size();
    ll have_p = 0; 
    priority_queue<state> pq = {};
    for(ll i = 1; i <= n; ++ i) {
        a[i] = List[i - 1];
        nxt[i] = i + 1;
        if(a[i] >= 0) {
            ++ have_p;
        }
        pq.push(state(a[i], i));
    }
    dsu dsu(n);
    while(!pq.empty() && have_p > k) {
        ll val = pq.top().val, idx = pq.top().idx;
        pq.pop();
        if(val != a[idx]) continue;
        if(val >= 0) -- have_p;
        if(idx > 1) {
            ll le = dsu.ancestor(idx - 1); 
            val += a[le];
            if(a[le] >= 0) -- have_p;
            dsu.join(le, idx); 
            a[idx] = - INF; nxt[le] = nxt[idx]; idx = le;
        }
        ll ri = nxt[idx];
        if(ri <= n) {
            val += a[ri];
            if(a[ri] >= 0) -- have_p;
            dsu.join(idx, ri); 
            a[ri] = - INF; nxt[idx] = nxt[ri];
        }
        if(val >= 0) ++ have_p;
        a[idx] = val; 
        if(val < 0 && (idx == 1 || nxt[idx] == n + 1)) continue;
        pq.push(state(val, idx));
    }
    ll res = 0;
    while(!pq.empty()) {
        ll val = pq.top().val, idx = pq.top().idx;
        pq.pop();
        if(val < 0 || val != a[idx]) continue;
        // cout << val << ' ' << idx << '\n';
        res += val;
    }
    cout << res;
    return (0 ^ 0);
}

/// Code by vuavisao

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 23 ms 5320 KB Output is correct
2 Correct 25 ms 5488 KB Output is correct
3 Correct 26 ms 5504 KB Output is correct
4 Correct 24 ms 5452 KB Output is correct
5 Correct 25 ms 5368 KB Output is correct
6 Correct 23 ms 5288 KB Output is correct
7 Correct 23 ms 5324 KB Output is correct
8 Correct 25 ms 5452 KB Output is correct
9 Correct 23 ms 5316 KB Output is correct
10 Correct 24 ms 4536 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 3192 KB Output is correct
2 Correct 15 ms 2660 KB Output is correct
3 Correct 17 ms 2536 KB Output is correct
4 Correct 17 ms 2520 KB Output is correct
5 Correct 23 ms 2568 KB Output is correct
6 Correct 15 ms 2524 KB Output is correct
7 Correct 15 ms 2556 KB Output is correct
8 Correct 24 ms 2644 KB Output is correct
9 Correct 23 ms 2516 KB Output is correct
10 Correct 16 ms 2612 KB Output is correct

Subtask #3
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 65 ms 9016 KB Output is correct
2 Correct 64 ms 8916 KB Output is correct
3 Correct 67 ms 9032 KB Output is correct
4 Correct 63 ms 9032 KB Output is correct
5 Correct 76 ms 9076 KB Output is correct
6 Correct 70 ms 9072 KB Output is correct
7 Correct 65 ms 9032 KB Output is correct
8 Correct 68 ms 9008 KB Output is correct
9 Correct 73 ms 9032 KB Output is correct
10 Correct 67 ms 9080 KB Output is correct

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 324 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 340 KB Output is correct

Subtask #5
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 324 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 336 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 2 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct

Subtask #6
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 324 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 336 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 2 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 364 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 468 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

# 결과 실행 시간 메모리 Grader output
1 Correct 23 ms 5320 KB Output is correct
2 Correct 25 ms 5488 KB Output is correct
3 Correct 26 ms 5504 KB Output is correct
4 Correct 24 ms 5452 KB Output is correct
5 Correct 25 ms 5368 KB Output is correct
6 Correct 23 ms 5288 KB Output is correct
7 Correct 23 ms 5324 KB Output is correct
8 Correct 25 ms 5452 KB Output is correct
9 Correct 23 ms 5316 KB Output is correct
10 Correct 24 ms 4536 KB Output is correct
11 Correct 15 ms 3192 KB Output is correct
12 Correct 15 ms 2660 KB Output is correct
13 Correct 17 ms 2536 KB Output is correct
14 Correct 17 ms 2520 KB Output is correct
15 Correct 23 ms 2568 KB Output is correct
16 Correct 15 ms 2524 KB Output is correct
17 Correct 15 ms 2556 KB Output is correct
18 Correct 24 ms 2644 KB Output is correct
19 Correct 23 ms 2516 KB Output is correct
20 Correct 16 ms 2612 KB Output is correct
21 Correct 65 ms 9016 KB Output is correct
22 Correct 64 ms 8916 KB Output is correct
23 Correct 67 ms 9032 KB Output is correct
24 Correct 63 ms 9032 KB Output is correct
25 Correct 76 ms 9076 KB Output is correct
26 Correct 70 ms 9072 KB Output is correct
27 Correct 65 ms 9032 KB Output is correct
28 Correct 68 ms 9008 KB Output is correct
29 Correct 73 ms 9032 KB Output is correct
30 Correct 67 ms 9080 KB Output is correct
31 Correct 0 ms 212 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 0 ms 212 KB Output is correct
35 Correct 1 ms 212 KB Output is correct
36 Correct 0 ms 324 KB Output is correct
37 Correct 0 ms 340 KB Output is correct
38 Correct 0 ms 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 0 ms 340 KB Output is correct
41 Correct 0 ms 340 KB Output is correct
42 Correct 0 ms 340 KB Output is correct
43 Correct 0 ms 340 KB Output is correct
44 Correct 1 ms 340 KB Output is correct
45 Correct 1 ms 336 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 1 ms 340 KB Output is correct
48 Correct 1 ms 340 KB Output is correct
49 Correct 2 ms 340 KB Output is correct
50 Correct 1 ms 340 KB Output is correct
51 Correct 1 ms 364 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 468 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 53 ms 11972 KB Output is correct
62 Correct 53 ms 12064 KB Output is correct
63 Correct 65 ms 11976 KB Output is correct
64 Correct 56 ms 12104 KB Output is correct
65 Correct 59 ms 12152 KB Output is correct
66 Correct 68 ms 12076 KB Output is correct
67 Correct 60 ms 11984 KB Output is correct
68 Correct 69 ms 12080 KB Output is correct
69 Correct 81 ms 11904 KB Output is correct
70 Correct 64 ms 11916 KB Output is correct