oj.uz

답안 #406282

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
406282 2021-05-17T10:20:29 Z saarang123 Discharging (NOI20_discharging) C++17
100 / 100
 385 ms 16472 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
 
const int inf = 1e15;
const int N = 1502;
 
using ll = long long;
ll eval(array<ll, 2> a, ll x) {
    return a[0]*x + a[1];
}
struct LiChao {
    struct Node {
        Node *l, *r;
        array<ll, 2> f;
        Node() : l(0), r(0), f{0, -(1ll<<62)} {}
    };
    deque<Node> buf;
    template<class... Args>
    Node *newnode(Args... args) {
        return &buf.emplace_back(args...);
    }
    void update(Node *&v, ll l, ll r, array<ll, 2> f) {
        if(!v) {
            v = newnode(), v->f = f;
            return;
        }
        ll mid = l + (r-l)/2;
        if(eval(f, mid) < eval(v->f, mid)) swap(f, v->f);
        if(l == r) return;
        if(eval(f, l) < eval(v->f, l))
            update(v->l, l, mid, f);
        else
            update(v->r, mid+1, r, f);
    }
    ll query(Node *v, ll l, ll r, ll x) {
        if(!v) return (1ll<<62);
        ll mid = l + (r-l)/2;
        return min(eval(v->f, x),
            x <= mid ? query(v->l, l, mid, x) : query(v->r, mid+1, r, x));
    }
    void update(array<ll, 2> f) {
        update(root, -(n-1), n-1, f);
    }
    ll query(ll x) {
        return query(root, -(n-1), n-1, x);
    }
    ll n;
    Node *root;
    LiChao(ll _n) : n(_n), root(0) {}
};

 
 
signed main() {
    std::ios::sync_with_stdio(0);
    std::cout.tie(0);
    std::cin.tie(0);
    int n; cin >> n;
    vector<int> a(n + 1), dp(n + 1);
    for(int i = 1; i <= n; i++) cin >> a[i];
    LiChao cht(1e9 + 3);
    dp[1] = a[1] * n;
    cht.update({n, 0}); //querying all n at one time
    int mx = a[1];
    for(int i = 2; i <= n; i++) {
        mx = max(mx, a[i]);
        cht.update({n - i + 1, dp[i - 1]});
        dp[i] = cht.query(mx);
        //we can qry for mx cuz the x coordinate has to be atleast mx (all under same time mx)
    }
    cout << dp[n] << '\n';
    return 0;
}

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 192 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct

Subtask #2
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 2 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 2 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct

Subtask #3
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 2 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 2 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 278 ms 16360 KB Output is correct
17 Correct 310 ms 16232 KB Output is correct
18 Correct 258 ms 16232 KB Output is correct
19 Correct 282 ms 16224 KB Output is correct
20 Correct 318 ms 16196 KB Output is correct
21 Correct 288 ms 16236 KB Output is correct
22 Correct 283 ms 16264 KB Output is correct
23 Correct 289 ms 16472 KB Output is correct
24 Correct 294 ms 16324 KB Output is correct
25 Correct 318 ms 16408 KB Output is correct
26 Correct 294 ms 16360 KB Output is correct
27 Correct 280 ms 16216 KB Output is correct
28 Correct 285 ms 16232 KB Output is correct
29 Correct 289 ms 16324 KB Output is correct
30 Correct 294 ms 16356 KB Output is correct

Subtask #4
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 345 ms 15964 KB Output is correct
2 Correct 332 ms 16068 KB Output is correct
3 Correct 322 ms 15948 KB Output is correct
4 Correct 333 ms 15948 KB Output is correct
5 Correct 332 ms 15972 KB Output is correct
6 Correct 334 ms 15984 KB Output is correct
7 Correct 343 ms 15964 KB Output is correct
8 Correct 325 ms 15948 KB Output is correct
9 Correct 385 ms 15956 KB Output is correct
10 Correct 339 ms 16004 KB Output is correct

Subtask #5
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 192 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 2 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 2 ms 332 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 2 ms 332 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 332 KB Output is correct
28 Correct 1 ms 332 KB Output is correct
29 Correct 1 ms 332 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 1 ms 332 KB Output is correct
32 Correct 1 ms 332 KB Output is correct
33 Correct 1 ms 332 KB Output is correct
34 Correct 1 ms 332 KB Output is correct
35 Correct 1 ms 332 KB Output is correct
36 Correct 1 ms 332 KB Output is correct
37 Correct 1 ms 332 KB Output is correct
38 Correct 1 ms 332 KB Output is correct
39 Correct 1 ms 332 KB Output is correct
40 Correct 1 ms 332 KB Output is correct
41 Correct 1 ms 332 KB Output is correct
42 Correct 1 ms 332 KB Output is correct
43 Correct 1 ms 332 KB Output is correct
44 Correct 1 ms 332 KB Output is correct
45 Correct 1 ms 332 KB Output is correct
46 Correct 1 ms 332 KB Output is correct
47 Correct 1 ms 332 KB Output is correct
48 Correct 1 ms 332 KB Output is correct
49 Correct 1 ms 332 KB Output is correct
50 Correct 1 ms 332 KB Output is correct

Subtask #6
28.0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 192 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 2 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 2 ms 332 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 2 ms 332 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 332 KB Output is correct
28 Correct 1 ms 332 KB Output is correct
29 Correct 1 ms 332 KB Output is correct
30 Correct 278 ms 16360 KB Output is correct
31 Correct 310 ms 16232 KB Output is correct
32 Correct 258 ms 16232 KB Output is correct
33 Correct 282 ms 16224 KB Output is correct
34 Correct 318 ms 16196 KB Output is correct
35 Correct 288 ms 16236 KB Output is correct
36 Correct 283 ms 16264 KB Output is correct
37 Correct 289 ms 16472 KB Output is correct
38 Correct 294 ms 16324 KB Output is correct
39 Correct 318 ms 16408 KB Output is correct
40 Correct 294 ms 16360 KB Output is correct
41 Correct 280 ms 16216 KB Output is correct
42 Correct 285 ms 16232 KB Output is correct
43 Correct 289 ms 16324 KB Output is correct
44 Correct 294 ms 16356 KB Output is correct
45 Correct 345 ms 15964 KB Output is correct
46 Correct 332 ms 16068 KB Output is correct
47 Correct 322 ms 15948 KB Output is correct
48 Correct 333 ms 15948 KB Output is correct
49 Correct 332 ms 15972 KB Output is correct
50 Correct 334 ms 15984 KB Output is correct
51 Correct 343 ms 15964 KB Output is correct
52 Correct 325 ms 15948 KB Output is correct
53 Correct 385 ms 15956 KB Output is correct
54 Correct 339 ms 16004 KB Output is correct
55 Correct 1 ms 340 KB Output is correct
56 Correct 1 ms 332 KB Output is correct
57 Correct 1 ms 332 KB Output is correct
58 Correct 1 ms 332 KB Output is correct
59 Correct 1 ms 332 KB Output is correct
60 Correct 1 ms 332 KB Output is correct
61 Correct 1 ms 332 KB Output is correct
62 Correct 1 ms 332 KB Output is correct
63 Correct 1 ms 332 KB Output is correct
64 Correct 1 ms 332 KB Output is correct
65 Correct 1 ms 332 KB Output is correct
66 Correct 1 ms 332 KB Output is correct
67 Correct 1 ms 332 KB Output is correct
68 Correct 1 ms 332 KB Output is correct
69 Correct 1 ms 332 KB Output is correct
70 Correct 1 ms 332 KB Output is correct
71 Correct 1 ms 332 KB Output is correct
72 Correct 1 ms 332 KB Output is correct
73 Correct 1 ms 332 KB Output is correct
74 Correct 1 ms 332 KB Output is correct
75 Correct 1 ms 332 KB Output is correct
76 Correct 297 ms 15964 KB Output is correct
77 Correct 271 ms 15960 KB Output is correct
78 Correct 255 ms 15872 KB Output is correct
79 Correct 276 ms 15956 KB Output is correct
80 Correct 282 ms 15960 KB Output is correct
81 Correct 250 ms 15972 KB Output is correct
82 Correct 252 ms 15948 KB Output is correct
83 Correct 262 ms 15972 KB Output is correct
84 Correct 256 ms 15900 KB Output is correct
85 Correct 260 ms 16088 KB Output is correct
86 Correct 249 ms 16100 KB Output is correct
87 Correct 246 ms 15948 KB Output is correct
88 Correct 259 ms 15972 KB Output is correct
89 Correct 279 ms 15964 KB Output is correct
90 Correct 257 ms 15976 KB Output is correct
91 Correct 252 ms 15948 KB Output is correct
92 Correct 291 ms 16316 KB Output is correct
93 Correct 285 ms 16268 KB Output is correct
94 Correct 245 ms 15968 KB Output is correct
95 Correct 258 ms 15948 KB Output is correct
96 Correct 256 ms 15980 KB Output is correct
97 Correct 312 ms 15948 KB Output is correct
98 Correct 256 ms 15976 KB Output is correct
99 Correct 269 ms 15960 KB Output is correct
100 Correct 265 ms 15964 KB Output is correct