oj.uz

Submission #1078116

# Submission time Handle Problem Language Result Execution time Memory
1078116 2024-08-27T12:51:43 Z TrinhKhanhDung Triple Jump (JOI19_jumps) C++14
100 / 100
 852 ms 124788 KB 
#include <bits/stdc++.h>
#define ll long long
#define fi first
#define se second
#define sz(x) (int)x.size()
#define ALL(v) v.begin(),v.end()
#define MASK(k) (1LL << (k))
#define BIT(x, i) (((x) >> (i)) & 1)
#define oo (ll)1e18
#define INF (ll)1e9
#define MOD (ll)(1e9 + 7)

using namespace std;

template<class T1, class T2>
    bool maximize(T1 &a, T2 b){if(a < b){a = b; return true;} return false;}

template<class T1, class T2>
    bool minimize(T1 &a, T2 b){if(a > b){a = b; return true;} return false;}

template<class T1, class T2>
    void add(T1 &a, T2 b){a += b; if(a >= MOD) a -= MOD;}

template<class T1, class T2>
    void sub(T1 &a, T2 b){a -= b; if(a < 0) a += MOD;}

template<class T>
    void cps(T &v){sort(ALL(v)); v.resize(unique(ALL(v)) - v.begin());}

struct seg{
    vector<ll> a, b, laz;
    int n;

    seg(int _n = 0){
        n = _n;
        a.resize(n * 4 + 3, 0);
        b.resize(n * 4 + 3, 0);
        laz.resize(n * 4 + 3, 0);
    }

    void build(int val[], int i, int l, int r){
        if(l == r){
            a[i] = val[l];
            b[i] = val[l];
            return;
        }
        int m = (l + r) >> 1;
        build(val, i * 2, l, m);
        build(val, i * 2 + 1, m + 1, r);
        a[i] = max(a[i * 2], a[i * 2 + 1]);
        b[i] = max(b[i * 2], b[i * 2 + 1]);
    }

    void push(int i){
        maximize(laz[i * 2], laz[i]);
        maximize(laz[i * 2 + 1], laz[i]);
        maximize(b[i * 2], a[i * 2] + laz[i]);
        maximize(b[i * 2 + 1], a[i * 2 + 1] + laz[i]);
    }

    void upd(int i, int l, int r, int u, int v, ll c){
        if(r < u || v < l) return;
        if(u <= l && r <= v){
            maximize(laz[i], c);
            maximize(b[i], a[i] + c);
            return;
        }
        push(i);
        int m = (l + r) >> 1;
        upd(i * 2, l, m, u, v, c);
        upd(i * 2 + 1, m + 1, r, u, v, c);
        b[i] = max(b[i * 2], b[i * 2 + 1]);
    }

    ll get(int i, int l, int r, int u, int v){
        if(r < u || v < l) return 0;
        if(u <= l && r <= v) return b[i];
        push(i);
        int m = (l + r) >> 1;
        return max(get(i * 2, l, m, u, v), get(i * 2 + 1, m + 1, r, u, v));
    }
};

const int MAX = 5e5 + 10;

int N, Q;
int a[MAX];
ll ans[MAX];
vector<int> change[MAX];
vector<pair<int, int>> ask[MAX];

void solve(){
    cin >> N;
    for(int i=1; i<=N; i++){
        cin >> a[i];
    }
    seg it(N);
    it.build(a, 1, 1, N);
    stack<int> st;
    for(int i=N; i>=1; i--){
        while(sz(st)){
            change[i].push_back(st.top());
            if(a[st.top()] > a[i]) break;
            st.pop();
        }
        st.push(i);
    }
    cin >> Q;
    for(int i=1; i<=Q; i++){
        int l, r;
        cin >> l >> r;
        ask[l].push_back({r, i});
    }
    for(int i=N; i>=1; i--){
        for(int x: change[i]){
            if(x * 2 - i <= N){
                it.upd(1, 1, N, x * 2 - i, N, a[i] + a[x]);
            }
        }
        for(auto o: ask[i]){
            ans[o.se] = it.get(1, 1, N, i, o.fi);
        }
    }
    for(int i=1; i<=Q; i++){
        cout << ans[i] << '\n';
    }
}

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);
   // freopen("task.inp", "r", stdin);
   // freopen("task.out", "w", stdout);

    int t = 1;
   // cin >> t;
    while(t--){
        solve();
    }

    return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 23900 KB Output is correct
2 Correct 16 ms 23900 KB Output is correct
3 Correct 13 ms 24152 KB Output is correct
4 Correct 12 ms 23900 KB Output is correct
5 Correct 11 ms 23900 KB Output is correct
6 Correct 12 ms 23904 KB Output is correct
7 Correct 11 ms 23900 KB Output is correct
8 Correct 15 ms 23948 KB Output is correct
9 Correct 11 ms 23900 KB Output is correct
10 Correct 11 ms 23732 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 23900 KB Output is correct
2 Correct 16 ms 23900 KB Output is correct
3 Correct 13 ms 24152 KB Output is correct
4 Correct 12 ms 23900 KB Output is correct
5 Correct 11 ms 23900 KB Output is correct
6 Correct 12 ms 23904 KB Output is correct
7 Correct 11 ms 23900 KB Output is correct
8 Correct 15 ms 23948 KB Output is correct
9 Correct 11 ms 23900 KB Output is correct
10 Correct 11 ms 23732 KB Output is correct
11 Correct 192 ms 45220 KB Output is correct
12 Correct 214 ms 45004 KB Output is correct
13 Correct 196 ms 44932 KB Output is correct
14 Correct 186 ms 45136 KB Output is correct
15 Correct 198 ms 45060 KB Output is correct
16 Correct 183 ms 44568 KB Output is correct
17 Correct 190 ms 44348 KB Output is correct
18 Correct 181 ms 44372 KB Output is correct
19 Correct 202 ms 44968 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 134 ms 51580 KB Output is correct
2 Correct 87 ms 52304 KB Output is correct
3 Correct 77 ms 51520 KB Output is correct
4 Correct 124 ms 51692 KB Output is correct
5 Correct 121 ms 51748 KB Output is correct
6 Correct 123 ms 51028 KB Output is correct
7 Correct 147 ms 50984 KB Output is correct
8 Correct 120 ms 50912 KB Output is correct
9 Correct 139 ms 51280 KB Output is correct

Subtask #4
54.0 / 54.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 23900 KB Output is correct
2 Correct 16 ms 23900 KB Output is correct
3 Correct 13 ms 24152 KB Output is correct
4 Correct 12 ms 23900 KB Output is correct
5 Correct 11 ms 23900 KB Output is correct
6 Correct 12 ms 23904 KB Output is correct
7 Correct 11 ms 23900 KB Output is correct
8 Correct 15 ms 23948 KB Output is correct
9 Correct 11 ms 23900 KB Output is correct
10 Correct 11 ms 23732 KB Output is correct
11 Correct 192 ms 45220 KB Output is correct
12 Correct 214 ms 45004 KB Output is correct
13 Correct 196 ms 44932 KB Output is correct
14 Correct 186 ms 45136 KB Output is correct
15 Correct 198 ms 45060 KB Output is correct
16 Correct 183 ms 44568 KB Output is correct
17 Correct 190 ms 44348 KB Output is correct
18 Correct 181 ms 44372 KB Output is correct
19 Correct 202 ms 44968 KB Output is correct
20 Correct 134 ms 51580 KB Output is correct
21 Correct 87 ms 52304 KB Output is correct
22 Correct 77 ms 51520 KB Output is correct
23 Correct 124 ms 51692 KB Output is correct
24 Correct 121 ms 51748 KB Output is correct
25 Correct 123 ms 51028 KB Output is correct
26 Correct 147 ms 50984 KB Output is correct
27 Correct 120 ms 50912 KB Output is correct
28 Correct 139 ms 51280 KB Output is correct
29 Correct 852 ms 118868 KB Output is correct
30 Correct 607 ms 120304 KB Output is correct
31 Correct 632 ms 118260 KB Output is correct
32 Correct 720 ms 118856 KB Output is correct
33 Correct 816 ms 118848 KB Output is correct
34 Correct 735 ms 116564 KB Output is correct
35 Correct 692 ms 116308 KB Output is correct
36 Correct 688 ms 116084 KB Output is correct
37 Correct 725 ms 117704 KB Output is correct
38 Correct 608 ms 124788 KB Output is correct
39 Correct 482 ms 124500 KB Output is correct
40 Correct 572 ms 121172 KB Output is correct
41 Correct 511 ms 120596 KB Output is correct
42 Correct 521 ms 120760 KB Output is correct
43 Correct 531 ms 122372 KB Output is correct
44 Correct 558 ms 123732 KB Output is correct
45 Correct 564 ms 123988 KB Output is correct
46 Correct 559 ms 120724 KB Output is correct
47 Correct 546 ms 120364 KB Output is correct
48 Correct 523 ms 120404 KB Output is correct
49 Correct 533 ms 122448 KB Output is correct
50 Correct 650 ms 122016 KB Output is correct
51 Correct 600 ms 121936 KB Output is correct
52 Correct 667 ms 119380 KB Output is correct
53 Correct 644 ms 119244 KB Output is correct
54 Correct 622 ms 119260 KB Output is correct
55 Correct 689 ms 120792 KB Output is correct