oj.uz

답안 #590053

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
590053 2022-07-05T13:48:24 Z Tien_Noob 3단 점프 (JOI19_jumps) C++17
100 / 100
 854 ms 59760 KB 
//Make CSP great again
//Vengeance
#include <bits/stdc++.h>
#define TASK "TESTCODE"
#define Log2(x) 31 - __builtin_clz(x)
using namespace std;
const int N = 5e5;
int a[N + 1], res[N + 1], n, q;
vector<pair<int, int> > query[N + 1];
struct SegmentTree
{
    int add[4 * N + 1], mx[4 * N + 1], lazy[4 * N + 1];
    void buildtree(int v, int TreeL, int TreeR)
    {
        add[v] = lazy[v] = 0;
        if (TreeL == TreeR)
        {
            mx[v] = a[TreeL];
            return ;
        }
        int mid = (TreeL + TreeR)/2;
        buildtree(v * 2, TreeL, mid);
        buildtree(v * 2 + 1, mid + 1, TreeR);
        mx[v] = max(mx[2 * v], mx[2 * v + 1]);
    }
    void down(int v)
    {
        add[2 * v] = max(add[2 * v], lazy[v] + mx[2 * v]);
        add[2 * v + 1] = max(add[2 * v + 1], lazy[v] + mx[2 * v + 1]);

        lazy[2 * v] = max(lazy[2 * v], lazy[v]);
        lazy[2 * v + 1] = max(lazy[2 * v + 1], lazy[v]);
    }
    void upd(int v, int TreeL, int TreeR, int L, int R, int val)
    {
        //cerr << v << '\n';
        if (L > R)
        {
            return ;
        }
        if (TreeL == L && TreeR == R)
        {
            lazy[v] = max(lazy[v], val);
            add[v] = max(add[v], lazy[v] + mx[v]);
            return ;
        }
        int mid = (TreeL + TreeR)/2;
        down(v);
        upd(v * 2, TreeL, mid, L, min(R, mid), val);
        upd(v * 2 + 1, mid + 1, TreeR, max(L, mid + 1), R, val);
        add[v] = max(add[2 * v], add[2 * v + 1]);
    }
    int get(int v, int TreeL, int TreeR, int L, int R)
    {
        if (L > R)
        {
            return 0;
        }
        if (TreeL == L && TreeR == R)
        {
            return max(add[v], lazy[v] + mx[v]);
        }
        down(v);
        int mid = (TreeL + TreeR)/2;
        return max(get(v * 2, TreeL, mid, L, min(R, mid)), get(v * 2 + 1, mid + 1, TreeR, max(L, mid + 1), R));
    }
} tree;
void read()
{
    cin >> n;
    for (int i = 1; i <= n; ++ i)
    {
        cin >> a[i];
    }
    cin >> q;
    for (int i = 1; i <= q; ++ i)
    {
        int l, r;
        cin >> l >> r;
        query[l].emplace_back(r, i);
    }
    tree.buildtree(1, 1, n);
}
void solve()
{
    stack<int> st;
    for (int l = n; l >= 1; -- l)
    {
        while(!st.empty() && a[l] >= a[st.top()])
        {
            tree.upd(1, 1, n, 2 * st.top() - l, n, a[l] + a[st.top()]);
            //cerr << l << ' ' << st.top() << '\n';
            st.pop();
        }
        if (!st.empty())
        {
            //cerr << l << ' ' << st.top() << '\n';
            tree.upd(1, 1, n, 2 * st.top() - l, n, a[l] + a[st.top()]);
        }
        st.push(l);
        for (auto &[r, i] : query[l])
        {
            res[i] = tree.get(1, 1, n, l, r);
        }
    }
    for (int i = 1; i <= q; ++ i)
    {
        cout << res[i] << '\n';
    }
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    if (fopen(TASK".INP", "r"))
    {
        freopen(TASK".INP", "r", stdin);
        //freopen(TASK".OUT", "w", stdout);
    }
    int t = 1;
    bool typetest = false;
    if (typetest)
    {
        cin >> t;
    }
    for (int __ = 1; __ <= t; ++ __)
    {
        //cout << "Case " << __ << ": ";
        read();
        solve();
    }
}

Compilation message

jumps.cpp: In function 'int main()':
jumps.cpp:117:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  117 |         freopen(TASK".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 12104 KB Output is correct
2 Correct 7 ms 12048 KB Output is correct
3 Correct 7 ms 12080 KB Output is correct
4 Correct 10 ms 11988 KB Output is correct
5 Correct 7 ms 11988 KB Output is correct
6 Correct 7 ms 12088 KB Output is correct
7 Correct 6 ms 11988 KB Output is correct
8 Correct 6 ms 12116 KB Output is correct
9 Correct 7 ms 11988 KB Output is correct
10 Correct 6 ms 11988 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 12104 KB Output is correct
2 Correct 7 ms 12048 KB Output is correct
3 Correct 7 ms 12080 KB Output is correct
4 Correct 10 ms 11988 KB Output is correct
5 Correct 7 ms 11988 KB Output is correct
6 Correct 7 ms 12088 KB Output is correct
7 Correct 6 ms 11988 KB Output is correct
8 Correct 6 ms 12116 KB Output is correct
9 Correct 7 ms 11988 KB Output is correct
10 Correct 6 ms 11988 KB Output is correct
11 Correct 272 ms 28172 KB Output is correct
12 Correct 357 ms 28192 KB Output is correct
13 Correct 261 ms 28252 KB Output is correct
14 Correct 237 ms 28256 KB Output is correct
15 Correct 318 ms 28364 KB Output is correct
16 Correct 235 ms 27724 KB Output is correct
17 Correct 246 ms 27728 KB Output is correct
18 Correct 246 ms 27576 KB Output is correct
19 Correct 299 ms 28204 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 106 ms 19280 KB Output is correct
2 Correct 67 ms 20104 KB Output is correct
3 Correct 64 ms 19264 KB Output is correct
4 Correct 108 ms 19276 KB Output is correct
5 Correct 107 ms 19280 KB Output is correct
6 Correct 119 ms 19276 KB Output is correct
7 Correct 109 ms 19284 KB Output is correct
8 Correct 107 ms 19280 KB Output is correct
9 Correct 106 ms 19276 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 12104 KB Output is correct
2 Correct 7 ms 12048 KB Output is correct
3 Correct 7 ms 12080 KB Output is correct
4 Correct 10 ms 11988 KB Output is correct
5 Correct 7 ms 11988 KB Output is correct
6 Correct 7 ms 12088 KB Output is correct
7 Correct 6 ms 11988 KB Output is correct
8 Correct 6 ms 12116 KB Output is correct
9 Correct 7 ms 11988 KB Output is correct
10 Correct 6 ms 11988 KB Output is correct
11 Correct 272 ms 28172 KB Output is correct
12 Correct 357 ms 28192 KB Output is correct
13 Correct 261 ms 28252 KB Output is correct
14 Correct 237 ms 28256 KB Output is correct
15 Correct 318 ms 28364 KB Output is correct
16 Correct 235 ms 27724 KB Output is correct
17 Correct 246 ms 27728 KB Output is correct
18 Correct 246 ms 27576 KB Output is correct
19 Correct 299 ms 28204 KB Output is correct
20 Correct 106 ms 19280 KB Output is correct
21 Correct 67 ms 20104 KB Output is correct
22 Correct 64 ms 19264 KB Output is correct
23 Correct 108 ms 19276 KB Output is correct
24 Correct 107 ms 19280 KB Output is correct
25 Correct 119 ms 19276 KB Output is correct
26 Correct 109 ms 19284 KB Output is correct
27 Correct 107 ms 19280 KB Output is correct
28 Correct 106 ms 19276 KB Output is correct
29 Correct 854 ms 45164 KB Output is correct
30 Correct 696 ms 56108 KB Output is correct
31 Correct 703 ms 53964 KB Output is correct
32 Correct 846 ms 54084 KB Output is correct
33 Correct 818 ms 54096 KB Output is correct
34 Correct 843 ms 51952 KB Output is correct
35 Correct 775 ms 51656 KB Output is correct
36 Correct 780 ms 51516 KB Output is correct
37 Correct 823 ms 52988 KB Output is correct
38 Correct 567 ms 59724 KB Output is correct
39 Correct 548 ms 59760 KB Output is correct
40 Correct 545 ms 56528 KB Output is correct
41 Correct 528 ms 55936 KB Output is correct
42 Correct 546 ms 56036 KB Output is correct
43 Correct 555 ms 57740 KB Output is correct
44 Correct 590 ms 59140 KB Output is correct
45 Correct 587 ms 59228 KB Output is correct
46 Correct 573 ms 56076 KB Output is correct
47 Correct 562 ms 55652 KB Output is correct
48 Correct 607 ms 55756 KB Output is correct
49 Correct 563 ms 57804 KB Output is correct
50 Correct 653 ms 57268 KB Output is correct
51 Correct 652 ms 55792 KB Output is correct
52 Correct 637 ms 54980 KB Output is correct
53 Correct 634 ms 54512 KB Output is correct
54 Correct 678 ms 54480 KB Output is correct
55 Correct 634 ms 55952 KB Output is correct