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답안 #958836

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
958836 2024-04-07T00:39:53 Z vjudge1 Art Exhibition (JOI18_art) C++17
100 / 100
 172 ms 86616 KB 
#include <bits/stdc++.h>

#define range(it, a, b) for (ll it = a; it < b; it++)
#define all(x) begin(x), end(x)
#define ll long long
#define ull unsigned long long
#define INF64 ((ll) 1 << 62)
#define INF32 (1 << 30)
#define mset multiset
#define uset unordered_set
#define umap unordered_map 
#define pqueue priority_queue 
#define ptr(A) shared_ptr<A>

using namespace std;

void setio (string name) {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    if (name.size()) {
        freopen((name + ".in").c_str(), "r", stdin);
        freopen((name + ".out").c_str(), "w", stdout);
    }
}

struct TPos {
    ll val, sz;
};

struct SegTree {
    struct Node {
        Node* left;
        Node* right;

        ll l, r, m;
        ll ans;
        ll sum;
        ll pre;
        ll suf;
    };

    Node* root;
    vector<TPos>& arr;

    SegTree (vector<TPos>& a) : arr(a) {
        root = new Node;
        root->l = 0;
        root->r = a.size() - 1;
        root->m = (a.size()-1)/2;
        build(root);
    }

    void build(Node* node) {
        if (node->l == node->r) {
            node->ans = arr[node->l].val;
            node->sum = node->ans;
            node->suf = node->sum + arr[node->l].sz;
            node->pre = node->sum - arr[node->l].sz;
            return;
        }

        node->left = new Node;
        node->left->l = node->l;
        node->left->r = node->m;
        node->left->m = (node->l + node->m)/2;
        build(node->left);

        node->right = new Node;
        node->right->l = node->m+1;
        node->right->r = node->r;
        node->right->m = (node->r + node->m+1)/2;
        build (node->right);

        node->ans = max({node->left->ans, node->right->ans, node->left->suf + node->right->pre});
        node->sum = node->left->sum + node->right->sum;
        node->pre = max(node->left->pre, node->left->sum + node->right->pre);
        node->suf = max(node->right->suf, node->right->sum + node->left->suf);
    }
};

ll n;
vector<TPos> arr;

void solve() {
    cin >> n;
    arr.resize(n);

    range(i, 0, n) 
        cin >> arr[i].sz >> arr[i].val;
    sort(all(arr), [](const TPos& a, const TPos& b) {
        return a.sz < b.sz;
    });

    SegTree st(arr);
    cout << st.root->ans;
}

int main () {
    setio("");
    ll t = 1; 
    // cin >> t;
    while (t--) solve();
}

// IT'S TOUGH, I KNOW
// BUT YOU'D RATHER DIE FIGHTING THAN LIVE ON YOUR KNEES
// THOUG H YOU WON'T DO NEITHER OF THOSE
// IMPOSSIBLE, AS IT'S AGAINST YOUR NATURE
// AS YOU ALREADY WON
// I SEE YOUR MEDAL HANGING FROM YOUR NECK
// SHINING AS NOTHING YOU'VE EVER HAD

// THOUSANDS AND THOUSANDS OF LINES
// YOU AREADY MADE IT THIS FAR
// AND WHO COULD TELL HOW FAR YOU WILL GET...
// BUT YOU?

// THEN COME ON, YOU BASTARD!
// GO CLEAR YOUR MIND AND STAND
// AS EACH OF THOSE LINES IS A STEP CLOSER
// CLOSER TO THE GREATNESS YOU PURSUE
// CLOSER TO THE GREATNESS YOU ALREADY HAVE

Compilation message

art.cpp: In function 'void setio(std::string)':
art.cpp:21:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |         freopen((name + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
art.cpp:22:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |         freopen((name + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 344 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct

Subtask #3
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 2 ms 1112 KB Output is correct
28 Correct 3 ms 1116 KB Output is correct
29 Correct 2 ms 1116 KB Output is correct
30 Correct 2 ms 1116 KB Output is correct
31 Correct 2 ms 1116 KB Output is correct
32 Correct 2 ms 1116 KB Output is correct
33 Correct 2 ms 1116 KB Output is correct
34 Correct 2 ms 1116 KB Output is correct
35 Correct 2 ms 1116 KB Output is correct
36 Correct 2 ms 1116 KB Output is correct
37 Correct 2 ms 1116 KB Output is correct
38 Correct 2 ms 1116 KB Output is correct
39 Correct 2 ms 1116 KB Output is correct
40 Correct 2 ms 1116 KB Output is correct
41 Correct 2 ms 1116 KB Output is correct
42 Correct 2 ms 1116 KB Output is correct
43 Correct 3 ms 1116 KB Output is correct
44 Correct 3 ms 1116 KB Output is correct
45 Correct 3 ms 1116 KB Output is correct
46 Correct 2 ms 1116 KB Output is correct
47 Correct 2 ms 1116 KB Output is correct
48 Correct 2 ms 1112 KB Output is correct
49 Correct 2 ms 1116 KB Output is correct
50 Correct 2 ms 1116 KB Output is correct
51 Correct 2 ms 1316 KB Output is correct

Subtask #4
50.0 / 50.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 2 ms 1112 KB Output is correct
28 Correct 3 ms 1116 KB Output is correct
29 Correct 2 ms 1116 KB Output is correct
30 Correct 2 ms 1116 KB Output is correct
31 Correct 2 ms 1116 KB Output is correct
32 Correct 2 ms 1116 KB Output is correct
33 Correct 2 ms 1116 KB Output is correct
34 Correct 2 ms 1116 KB Output is correct
35 Correct 2 ms 1116 KB Output is correct
36 Correct 2 ms 1116 KB Output is correct
37 Correct 2 ms 1116 KB Output is correct
38 Correct 2 ms 1116 KB Output is correct
39 Correct 2 ms 1116 KB Output is correct
40 Correct 2 ms 1116 KB Output is correct
41 Correct 2 ms 1116 KB Output is correct
42 Correct 2 ms 1116 KB Output is correct
43 Correct 3 ms 1116 KB Output is correct
44 Correct 3 ms 1116 KB Output is correct
45 Correct 3 ms 1116 KB Output is correct
46 Correct 2 ms 1116 KB Output is correct
47 Correct 2 ms 1116 KB Output is correct
48 Correct 2 ms 1112 KB Output is correct
49 Correct 2 ms 1116 KB Output is correct
50 Correct 2 ms 1116 KB Output is correct
51 Correct 2 ms 1316 KB Output is correct
52 Correct 164 ms 86348 KB Output is correct
53 Correct 169 ms 86376 KB Output is correct
54 Correct 163 ms 86352 KB Output is correct
55 Correct 164 ms 86356 KB Output is correct
56 Correct 163 ms 86372 KB Output is correct
57 Correct 163 ms 86400 KB Output is correct
58 Correct 163 ms 86356 KB Output is correct
59 Correct 162 ms 86376 KB Output is correct
60 Correct 163 ms 86352 KB Output is correct
61 Correct 172 ms 86356 KB Output is correct
62 Correct 164 ms 86352 KB Output is correct
63 Correct 162 ms 86352 KB Output is correct
64 Correct 164 ms 86380 KB Output is correct
65 Correct 164 ms 86356 KB Output is correct
66 Correct 167 ms 86616 KB Output is correct
67 Correct 167 ms 86352 KB Output is correct
68 Correct 168 ms 86352 KB Output is correct