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답안 #1022903

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1022903 2024-07-14T07:23:47 Z mansur 송신탑 (IOI22_towers) C++17
27 / 100
 4000 ms 3712 KB 
#include "towers.h"
#include<bits/stdc++.h>

using namespace std;

#define rall(s) s.rbegin(), s.rend()
#define all(s) s.begin(), s.end()
#define sz(s) (int)s.size()
#define s second 
#define f first 

using ll = long long;
using pii = pair<int, int>; 
using pll = pair<ll, ll>;

vector<int> h;
int n, k, ok = 1;
const int inf = 1e9, N1 = 2e5;

pii t[4 * N1];

void bld(int u = 1, int tl = 0, int tr = n - 1) {
    if (tl == tr) {
        t[u] = {tl, tl};
        return;
    }
    int m = (tl + tr) / 2;
    bld(u * 2, tl, m);
    bld(u * 2 + 1, m + 1, tr);
    t[u] = t[u * 2 + 1];
    if (h[t[u * 2].f] > h[t[u].f]) t[u].f = t[u * 2].f;
    if (h[t[u * 2].s] < h[t[u].s]) t[u].s = t[u * 2].s;
}

void init(int N, vector<int> H) {
    n = N, h = H;
    k = n - 1;
    for (int i = 1; i < n; i++) {
        if (h[i] < h[i - 1]) {
            k = i - 1;
            break;
        }
    }
    for (int i = 1; i < k; i++) {
        if (h[i - 1] > h[i]) ok = 0;
    }
    for (int i = k + 1; i < n; i++) {
        if (h[i - 1] < h[i]) ok = 0;
    }
    bld();
}


pii get(int l, int r, int u = 1, int tl = 0, int tr = n - 1) {
    if (tl > r || tr < l) return {-1, -1};
    if (tl >= l && tr <= r) return t[u];
    int m = (tl + tr) / 2;
    auto [x1, x2] = get(l, r, u * 2, tl, m);
    auto [y1, y2] = get(l, r, u * 2 + 1, m + 1, tr);
    if (x1 == -1) return {y1, y2};
    if (y1 == -1) return {x1, x2};
    if (h[y1] > h[x1]) x1 = y1;
    if (h[y2] < h[x2]) x2 = y2;
    return {x1, x2};
}

int f(int l, int r, int d, int mx) {
    if (r < l) return 0;
    if (l == r) return (h[l] <= mx);
    auto [pos, ps] = get(l, r);
    if (h[ps] > mx) return 0;
    if (pos == l) return f(l + 1, r, d, mx);
    if (pos == r) return f(l, r - 1, d, mx);
    return max(1, f(l, pos - 1, d, min(mx, h[pos] - d)) + f(pos + 1, r, d, min(mx, h[pos] - d)));
}

int max_towers(int l, int r, int d) {
    if (ok) {
        if (k == -1) return 1;
        if (k <= l || r <= k) return 1;
        if (h[l] > h[k] - d || h[r] > h[k] - d) return 1;
        return 2;
    }
    return f(l, r, d, inf);
}

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 306 ms 3160 KB Output is correct
2 Correct 628 ms 3672 KB Output is correct
3 Correct 551 ms 3664 KB Output is correct
4 Correct 514 ms 3668 KB Output is correct
5 Correct 526 ms 3660 KB Output is correct
6 Correct 534 ms 3672 KB Output is correct
7 Correct 567 ms 3672 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct

Subtask #2
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 0 ms 344 KB Output is correct
24 Correct 1 ms 344 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 1 ms 344 KB Output is correct
28 Correct 0 ms 344 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 1 ms 344 KB Output is correct
31 Correct 2 ms 344 KB Output is correct
32 Correct 1 ms 344 KB Output is correct
33 Correct 0 ms 344 KB Output is correct
34 Correct 1 ms 344 KB Output is correct
35 Correct 1 ms 344 KB Output is correct

Subtask #3
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 0 ms 344 KB Output is correct
24 Correct 1 ms 344 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 1 ms 344 KB Output is correct
28 Correct 0 ms 344 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 1 ms 344 KB Output is correct
31 Correct 2 ms 344 KB Output is correct
32 Correct 1 ms 344 KB Output is correct
33 Correct 0 ms 344 KB Output is correct
34 Correct 1 ms 344 KB Output is correct
35 Correct 1 ms 344 KB Output is correct
36 Correct 15 ms 3416 KB Output is correct
37 Correct 14 ms 3664 KB Output is correct
38 Correct 13 ms 3672 KB Output is correct
39 Correct 10 ms 3672 KB Output is correct
40 Correct 21 ms 3664 KB Output is correct
41 Correct 22 ms 3652 KB Output is correct
42 Correct 15 ms 3672 KB Output is correct
43 Correct 10 ms 3412 KB Output is correct
44 Correct 9 ms 3672 KB Output is correct
45 Correct 11 ms 3672 KB Output is correct
46 Correct 10 ms 3660 KB Output is correct
47 Correct 14 ms 3672 KB Output is correct
48 Correct 15 ms 3664 KB Output is correct
49 Correct 12 ms 3672 KB Output is correct
50 Correct 9 ms 3672 KB Output is correct
51 Correct 31 ms 3672 KB Output is correct
52 Correct 21 ms 3672 KB Output is correct
53 Correct 33 ms 3508 KB Output is correct
54 Correct 19 ms 3636 KB Output is correct
55 Correct 13 ms 3712 KB Output is correct
56 Correct 37 ms 3672 KB Output is correct
57 Correct 20 ms 3624 KB Output is correct
58 Correct 21 ms 3416 KB Output is correct
59 Correct 24 ms 3672 KB Output is correct
60 Correct 20 ms 3656 KB Output is correct
61 Correct 18 ms 3672 KB Output is correct
62 Correct 19 ms 3672 KB Output is correct
63 Correct 18 ms 3672 KB Output is correct
64 Correct 17 ms 3672 KB Output is correct
65 Correct 17 ms 3664 KB Output is correct
66 Correct 24 ms 3660 KB Output is correct
67 Correct 26 ms 3672 KB Output is correct

Subtask #4
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 4017 ms 3416 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 4003 ms 2904 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 1 ms 344 KB Output is correct
23 Correct 0 ms 344 KB Output is correct
24 Correct 1 ms 344 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 1 ms 344 KB Output is correct
28 Correct 0 ms 344 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 1 ms 344 KB Output is correct
31 Correct 2 ms 344 KB Output is correct
32 Correct 1 ms 344 KB Output is correct
33 Correct 0 ms 344 KB Output is correct
34 Correct 1 ms 344 KB Output is correct
35 Correct 1 ms 344 KB Output is correct
36 Correct 15 ms 3416 KB Output is correct
37 Correct 14 ms 3664 KB Output is correct
38 Correct 13 ms 3672 KB Output is correct
39 Correct 10 ms 3672 KB Output is correct
40 Correct 21 ms 3664 KB Output is correct
41 Correct 22 ms 3652 KB Output is correct
42 Correct 15 ms 3672 KB Output is correct
43 Correct 10 ms 3412 KB Output is correct
44 Correct 9 ms 3672 KB Output is correct
45 Correct 11 ms 3672 KB Output is correct
46 Correct 10 ms 3660 KB Output is correct
47 Correct 14 ms 3672 KB Output is correct
48 Correct 15 ms 3664 KB Output is correct
49 Correct 12 ms 3672 KB Output is correct
50 Correct 9 ms 3672 KB Output is correct
51 Correct 31 ms 3672 KB Output is correct
52 Correct 21 ms 3672 KB Output is correct
53 Correct 33 ms 3508 KB Output is correct
54 Correct 19 ms 3636 KB Output is correct
55 Correct 13 ms 3712 KB Output is correct
56 Correct 37 ms 3672 KB Output is correct
57 Correct 20 ms 3624 KB Output is correct
58 Correct 21 ms 3416 KB Output is correct
59 Correct 24 ms 3672 KB Output is correct
60 Correct 20 ms 3656 KB Output is correct
61 Correct 18 ms 3672 KB Output is correct
62 Correct 19 ms 3672 KB Output is correct
63 Correct 18 ms 3672 KB Output is correct
64 Correct 17 ms 3672 KB Output is correct
65 Correct 17 ms 3664 KB Output is correct
66 Correct 24 ms 3660 KB Output is correct
67 Correct 26 ms 3672 KB Output is correct
68 Execution timed out 4017 ms 3416 KB Time limit exceeded
69 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 306 ms 3160 KB Output is correct
2 Correct 628 ms 3672 KB Output is correct
3 Correct 551 ms 3664 KB Output is correct
4 Correct 514 ms 3668 KB Output is correct
5 Correct 526 ms 3660 KB Output is correct
6 Correct 534 ms 3672 KB Output is correct
7 Correct 567 ms 3672 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 0 ms 344 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 0 ms 344 KB Output is correct
23 Correct 1 ms 344 KB Output is correct
24 Correct 1 ms 344 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 1 ms 344 KB Output is correct
28 Correct 1 ms 344 KB Output is correct
29 Correct 1 ms 344 KB Output is correct
30 Correct 1 ms 344 KB Output is correct
31 Correct 1 ms 344 KB Output is correct
32 Correct 1 ms 344 KB Output is correct
33 Correct 0 ms 344 KB Output is correct
34 Correct 1 ms 344 KB Output is correct
35 Correct 1 ms 344 KB Output is correct
36 Correct 1 ms 344 KB Output is correct
37 Correct 1 ms 344 KB Output is correct
38 Correct 0 ms 344 KB Output is correct
39 Correct 1 ms 340 KB Output is correct
40 Correct 1 ms 344 KB Output is correct
41 Correct 2 ms 344 KB Output is correct
42 Correct 1 ms 344 KB Output is correct
43 Correct 0 ms 344 KB Output is correct
44 Correct 1 ms 344 KB Output is correct
45 Correct 1 ms 344 KB Output is correct
46 Correct 15 ms 3416 KB Output is correct
47 Correct 14 ms 3664 KB Output is correct
48 Correct 13 ms 3672 KB Output is correct
49 Correct 10 ms 3672 KB Output is correct
50 Correct 21 ms 3664 KB Output is correct
51 Correct 22 ms 3652 KB Output is correct
52 Correct 15 ms 3672 KB Output is correct
53 Correct 10 ms 3412 KB Output is correct
54 Correct 9 ms 3672 KB Output is correct
55 Correct 11 ms 3672 KB Output is correct
56 Correct 10 ms 3660 KB Output is correct
57 Correct 14 ms 3672 KB Output is correct
58 Correct 15 ms 3664 KB Output is correct
59 Correct 12 ms 3672 KB Output is correct
60 Correct 9 ms 3672 KB Output is correct
61 Correct 31 ms 3672 KB Output is correct
62 Correct 21 ms 3672 KB Output is correct
63 Correct 33 ms 3508 KB Output is correct
64 Correct 19 ms 3636 KB Output is correct
65 Correct 13 ms 3712 KB Output is correct
66 Correct 37 ms 3672 KB Output is correct
67 Correct 20 ms 3624 KB Output is correct
68 Correct 21 ms 3416 KB Output is correct
69 Correct 24 ms 3672 KB Output is correct
70 Correct 20 ms 3656 KB Output is correct
71 Correct 18 ms 3672 KB Output is correct
72 Correct 19 ms 3672 KB Output is correct
73 Correct 18 ms 3672 KB Output is correct
74 Correct 17 ms 3672 KB Output is correct
75 Correct 17 ms 3664 KB Output is correct
76 Correct 24 ms 3660 KB Output is correct
77 Correct 26 ms 3672 KB Output is correct
78 Execution timed out 4017 ms 3416 KB Time limit exceeded
79 Halted 0 ms 0 KB -