oj.uz

답안 #1110050

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1110050 2024-11-08T14:47:01 Z ljtunas 3단 점프 (JOI19_jumps) C++17
100 / 100
 886 ms 92264 KB 
// author : anhtun_hi , nqg
#include <bits/stdc++.h>
#define ll long long
#define ii pair<ll, ll>
#define fi first
#define se second
#define all(x) x.begin(), x.end()
#define reset(h, v)    memset(h, v, sizeof h)
#define Forv(i, a)     for(auto& i : a)
#define For(i, a, b)   for(int i = a; i <= b; ++i)
#define Ford(i, a, b)  for(int i = a; i >= b; --i)
#define c_bit(i)     __builtin_popcountll(i)
#define Bit(mask, i)    ((mask >> i) & 1LL)
#define onbit(mask, i)  ((mask) bitor (1LL << i))
#define offbit(mask, i) ((mask) &~ (1LL << i))
using namespace std;
namespace std {
    template <typename T, int D>
    struct _vector : public vector <_vector <T, D - 1>> {
        static_assert(D >= 1, "Dimension must be positive!");
        template <typename... Args>
        _vector(int n = 0, Args... args) : vector <_vector <T, D - 1>> (n, _vector <T, D - 1> (args...)) {}
    };
    template <typename T> struct _vector <T, 1> : public vector <T> {
        _vector(int n = 0, const T& val = T()) : vector <T> (n, val) {}
    };
    template <class A, class B> bool minimize(A &a, B b){return a > b ? a = b, true : false;}
    template <class A, class B> bool maximize(A &a, B b){return a < b ? a = b, true : false;}
}
const int dx[] = {0, 0, +1, -1}, dy[] = {-1, +1, 0, 0}, LOG = 20, base = 311, inf = 1e9 + 5;
const int MAXN = 1e6 + 5;
const  ll  mod = 1e9 + 7;
const  ll   oo = 1e18;

//#define int long long

int n, a[MAXN], q;
vector<ii> qr[MAXN];

ll st[MAXN << 2], mx[MAXN << 2], lazy[MAXN << 2];

void down(int id, int l, int r){
    if(!lazy[id] || l == r) return;
    for(int i : {id * 2, id * 2 + 1}){
        maximize(mx[i], st[i] + lazy[id]);
        maximize(lazy[i], lazy[id]);
    }
    lazy[id] = 0;
}

void build(int id, int l, int r){
    if(l == r){
        st[id] = a[l];
        return;
    }
    int mid = l + r >> 1;
    build(id << 1, l, mid);
    build(id << 1 | 1, mid + 1, r);
    st[id] = max(st[id << 1], st[id << 1 | 1]);
}

void update(int id, int l, int r, int u, int v, int val){
    if(v < l || r < u) return;
    down(id, l, r);
    if(u <= l && r <= v){
        maximize(mx[id], val + st[id]);
        maximize(lazy[id], val);
        down(id, l, r);
        return;
    }
    int mid = l + r >> 1;
    update(id << 1, l, mid, u, v, val);
    update(id << 1 | 1, mid + 1, r, u, v, val);
    mx[id] = max(mx[id << 1], mx[id << 1 | 1]);
}

int get(int id, int l, int r, int u, int v){
    if (v < l || r < u) return 0;
    down(id, l, r);
    if (u <= l && r <= v) return mx[id];
    int mid = l + r >> 1;
    return max(get(id << 1, l, mid, u, v), get(id << 1 | 1, mid + 1, r, u, v));
}

ll res[MAXN];

void Solve() {
    cin >> n;
    For (i, 1, n) cin >> a[i];
    build(1, 1, n);
    cin >> q;
    For (i, 1, q){
        int l, r; cin >> l >> r;
        qr[l].push_back({r, i});
    }
    vector<int> st;
    Ford(i, n, 1){
        while(st.size()){
            int j = st.back();
            update(1, 1, n, j * 2 - i, n, a[i] + a[j]);
            if(a[i] < a[j]) break;
            st.pop_back();
        }
        st.push_back(i);
        for(auto [r, id] : qr[i]) res[id] = get(1, 1, n, i + 2, r);
    }
    For(i, 1, q) cout << res[i] << '\n';
}

int32_t main() {
    cin.tie(0) -> sync_with_stdio(0);
    if(fopen("JOI19_jumps.inp", "r")) {
        freopen("JOI19_jumps.inp", "r", stdin);
        freopen("JOI19_jumps.out", "w", stdout);
    }

    int t = 1;
//    cin >> t;

    for (int test = 1; test <= t; test++) {
        Solve();
    }
    return 0;
}

Compilation message

jumps.cpp: In function 'void build(int, int, int)':
jumps.cpp:56:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   56 |     int mid = l + r >> 1;
      |               ~~^~~
jumps.cpp: In function 'void update(int, int, int, int, int, int)':
jumps.cpp:71:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   71 |     int mid = l + r >> 1;
      |               ~~^~~
jumps.cpp: In function 'int get(int, int, int, int, int)':
jumps.cpp:81:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   81 |     int mid = l + r >> 1;
      |               ~~^~~
jumps.cpp: In function 'int32_t main()':
jumps.cpp:113:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  113 |         freopen("JOI19_jumps.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
jumps.cpp:114:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  114 |         freopen("JOI19_jumps.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 26960 KB Output is correct
2 Correct 5 ms 26960 KB Output is correct
3 Correct 6 ms 26960 KB Output is correct
4 Correct 5 ms 26960 KB Output is correct
5 Correct 5 ms 27164 KB Output is correct
6 Correct 5 ms 26960 KB Output is correct
7 Correct 5 ms 26960 KB Output is correct
8 Correct 4 ms 26960 KB Output is correct
9 Correct 5 ms 26972 KB Output is correct
10 Correct 5 ms 27136 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 26960 KB Output is correct
2 Correct 5 ms 26960 KB Output is correct
3 Correct 6 ms 26960 KB Output is correct
4 Correct 5 ms 26960 KB Output is correct
5 Correct 5 ms 27164 KB Output is correct
6 Correct 5 ms 26960 KB Output is correct
7 Correct 5 ms 26960 KB Output is correct
8 Correct 4 ms 26960 KB Output is correct
9 Correct 5 ms 26972 KB Output is correct
10 Correct 5 ms 27136 KB Output is correct
11 Correct 216 ms 56660 KB Output is correct
12 Correct 215 ms 56652 KB Output is correct
13 Correct 192 ms 56804 KB Output is correct
14 Correct 232 ms 56648 KB Output is correct
15 Correct 229 ms 56648 KB Output is correct
16 Correct 241 ms 56192 KB Output is correct
17 Correct 241 ms 56144 KB Output is correct
18 Correct 240 ms 55880 KB Output is correct
19 Correct 243 ms 56648 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 98 ms 45128 KB Output is correct
2 Correct 59 ms 46156 KB Output is correct
3 Correct 67 ms 45036 KB Output is correct
4 Correct 100 ms 45128 KB Output is correct
5 Correct 98 ms 45140 KB Output is correct
6 Correct 94 ms 44492 KB Output is correct
7 Correct 113 ms 44360 KB Output is correct
8 Correct 100 ms 44276 KB Output is correct
9 Correct 93 ms 44780 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 26960 KB Output is correct
2 Correct 5 ms 26960 KB Output is correct
3 Correct 6 ms 26960 KB Output is correct
4 Correct 5 ms 26960 KB Output is correct
5 Correct 5 ms 27164 KB Output is correct
6 Correct 5 ms 26960 KB Output is correct
7 Correct 5 ms 26960 KB Output is correct
8 Correct 4 ms 26960 KB Output is correct
9 Correct 5 ms 26972 KB Output is correct
10 Correct 5 ms 27136 KB Output is correct
11 Correct 216 ms 56660 KB Output is correct
12 Correct 215 ms 56652 KB Output is correct
13 Correct 192 ms 56804 KB Output is correct
14 Correct 232 ms 56648 KB Output is correct
15 Correct 229 ms 56648 KB Output is correct
16 Correct 241 ms 56192 KB Output is correct
17 Correct 241 ms 56144 KB Output is correct
18 Correct 240 ms 55880 KB Output is correct
19 Correct 243 ms 56648 KB Output is correct
20 Correct 98 ms 45128 KB Output is correct
21 Correct 59 ms 46156 KB Output is correct
22 Correct 67 ms 45036 KB Output is correct
23 Correct 100 ms 45128 KB Output is correct
24 Correct 98 ms 45140 KB Output is correct
25 Correct 94 ms 44492 KB Output is correct
26 Correct 113 ms 44360 KB Output is correct
27 Correct 100 ms 44276 KB Output is correct
28 Correct 93 ms 44780 KB Output is correct
29 Correct 886 ms 89164 KB Output is correct
30 Correct 694 ms 91256 KB Output is correct
31 Correct 612 ms 89132 KB Output is correct
32 Correct 853 ms 89168 KB Output is correct
33 Correct 820 ms 89156 KB Output is correct
34 Correct 850 ms 86856 KB Output is correct
35 Correct 831 ms 86600 KB Output is correct
36 Correct 786 ms 86648 KB Output is correct
37 Correct 777 ms 88048 KB Output is correct
38 Correct 499 ms 91628 KB Output is correct
39 Correct 501 ms 91792 KB Output is correct
40 Correct 478 ms 88424 KB Output is correct
41 Correct 493 ms 87880 KB Output is correct
42 Correct 484 ms 88000 KB Output is correct
43 Correct 450 ms 89564 KB Output is correct
44 Correct 540 ms 91904 KB Output is correct
45 Correct 550 ms 91984 KB Output is correct
46 Correct 509 ms 88912 KB Output is correct
47 Correct 530 ms 88392 KB Output is correct
48 Correct 521 ms 88400 KB Output is correct
49 Correct 512 ms 90552 KB Output is correct
50 Correct 615 ms 92240 KB Output is correct
51 Correct 617 ms 92264 KB Output is correct
52 Correct 581 ms 89672 KB Output is correct
53 Correct 624 ms 89388 KB Output is correct
54 Correct 594 ms 89412 KB Output is correct
55 Correct 664 ms 90980 KB Output is correct