oj.uz

답안 #1110507

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1110507 2024-11-09T15:24:56 Z ljtunas 3단 점프 (JOI19_jumps) C++17
100 / 100
 1041 ms 92156 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;
    vector<int> st2;
    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);
        while(st2.size()){
            int j = st2.back();
            update(1, 1, n, j * 2 - i, n, a[i] + a[j]);
            if(a[i] > a[j]) break;
            st2.pop_back();
        }
        st2.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:121:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  121 |         freopen("JOI19_jumps.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
jumps.cpp:122:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  122 |         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 6 ms 26960 KB Output is correct
3 Correct 5 ms 27060 KB Output is correct
4 Correct 5 ms 26960 KB Output is correct
5 Correct 7 ms 27188 KB Output is correct
6 Correct 5 ms 27148 KB Output is correct
7 Correct 4 ms 27160 KB Output is correct
8 Correct 5 ms 26960 KB Output is correct
9 Correct 5 ms 26960 KB Output is correct
10 Correct 5 ms 26960 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 6 ms 26960 KB Output is correct
3 Correct 5 ms 27060 KB Output is correct
4 Correct 5 ms 26960 KB Output is correct
5 Correct 7 ms 27188 KB Output is correct
6 Correct 5 ms 27148 KB Output is correct
7 Correct 4 ms 27160 KB Output is correct
8 Correct 5 ms 26960 KB Output is correct
9 Correct 5 ms 26960 KB Output is correct
10 Correct 5 ms 26960 KB Output is correct
11 Correct 241 ms 56572 KB Output is correct
12 Correct 217 ms 56656 KB Output is correct
13 Correct 227 ms 56700 KB Output is correct
14 Correct 224 ms 56648 KB Output is correct
15 Correct 237 ms 56668 KB Output is correct
16 Correct 219 ms 56136 KB Output is correct
17 Correct 230 ms 56392 KB Output is correct
18 Correct 221 ms 56060 KB Output is correct
19 Correct 232 ms 56600 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 154 ms 43368 KB Output is correct
2 Correct 82 ms 44208 KB Output is correct
3 Correct 82 ms 44412 KB Output is correct
4 Correct 165 ms 43336 KB Output is correct
5 Correct 176 ms 44356 KB Output is correct
6 Correct 153 ms 44292 KB Output is correct
7 Correct 159 ms 43892 KB Output is correct
8 Correct 152 ms 44432 KB Output is correct
9 Correct 159 ms 44668 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 6 ms 26960 KB Output is correct
3 Correct 5 ms 27060 KB Output is correct
4 Correct 5 ms 26960 KB Output is correct
5 Correct 7 ms 27188 KB Output is correct
6 Correct 5 ms 27148 KB Output is correct
7 Correct 4 ms 27160 KB Output is correct
8 Correct 5 ms 26960 KB Output is correct
9 Correct 5 ms 26960 KB Output is correct
10 Correct 5 ms 26960 KB Output is correct
11 Correct 241 ms 56572 KB Output is correct
12 Correct 217 ms 56656 KB Output is correct
13 Correct 227 ms 56700 KB Output is correct
14 Correct 224 ms 56648 KB Output is correct
15 Correct 237 ms 56668 KB Output is correct
16 Correct 219 ms 56136 KB Output is correct
17 Correct 230 ms 56392 KB Output is correct
18 Correct 221 ms 56060 KB Output is correct
19 Correct 232 ms 56600 KB Output is correct
20 Correct 154 ms 43368 KB Output is correct
21 Correct 82 ms 44208 KB Output is correct
22 Correct 82 ms 44412 KB Output is correct
23 Correct 165 ms 43336 KB Output is correct
24 Correct 176 ms 44356 KB Output is correct
25 Correct 153 ms 44292 KB Output is correct
26 Correct 159 ms 43892 KB Output is correct
27 Correct 152 ms 44432 KB Output is correct
28 Correct 159 ms 44668 KB Output is correct
29 Correct 1020 ms 89148 KB Output is correct
30 Correct 713 ms 91328 KB Output is correct
31 Correct 667 ms 91276 KB Output is correct
32 Correct 977 ms 89168 KB Output is correct
33 Correct 917 ms 89056 KB Output is correct
34 Correct 886 ms 86856 KB Output is correct
35 Correct 969 ms 86492 KB Output is correct
36 Correct 931 ms 86584 KB Output is correct
37 Correct 1041 ms 87880 KB Output is correct
38 Correct 685 ms 91608 KB Output is correct
39 Correct 718 ms 91720 KB Output is correct
40 Correct 689 ms 88392 KB Output is correct
41 Correct 686 ms 87880 KB Output is correct
42 Correct 750 ms 87880 KB Output is correct
43 Correct 682 ms 89708 KB Output is correct
44 Correct 731 ms 92104 KB Output is correct
45 Correct 776 ms 92036 KB Output is correct
46 Correct 661 ms 88860 KB Output is correct
47 Correct 658 ms 88408 KB Output is correct
48 Correct 655 ms 88512 KB Output is correct
49 Correct 652 ms 90476 KB Output is correct
50 Correct 760 ms 92096 KB Output is correct
51 Correct 836 ms 92156 KB Output is correct
52 Correct 827 ms 89708 KB Output is correct
53 Correct 793 ms 89496 KB Output is correct
54 Correct 772 ms 89412 KB Output is correct
55 Correct 817 ms 90952 KB Output is correct