oj.uz

Submission #785374

# Submission time Handle Problem Language Result Execution time Memory
785374 2023-07-17T08:45:50 Z vjudge1 Radio Towers (IOI22_towers) C++17
27 / 100
 4000 ms 13320 KB 
#include "towers.h"
#include <bits/stdc++.h>
using namespace std;
int N, p;
vector<int> H;
void init(int n, vector<int> h) {
    N = n, H = h, p = -1;
    for (int i = 0; i < N; i++) {
        if ((i == 0 || H[i] > H[i - 1]) && (i == N - 1 || H[i] > H[i + 1])) {
            p = i;
        }
    }
    for (int i = 0; i < p; i++) {
        if (H[i] > H[i + 1]) {
            p = -1;
            return;
        }
    }
    for (int i = p + 1; i < N; i++) {
        if (H[i - 1] < H[i]) {
            p = -1;
            return;
        }
    }
}
int max_towers(int L, int R, int D) {
    if (p != -1) {
        int l = upper_bound(H.begin(), H.begin() + p, H[p] - D) - H.begin() - 1;
        int r = lower_bound(H.begin() + p, H.end(), H[p] - D, [&](int x, int y) {return x > y;}) - H.begin();
        return (L <= l && r <= R) ? 2 : 1;
    }
    if (D == 1) {
        vector<int> ord(R - L + 1);
        iota(ord.begin(), ord.end(), L);
        sort(ord.begin(), ord.end(), [&](int i, int j) {return H[i] < H[j];});
        int ans = 0;
        vector<bool> f(N);
        for (int i : ord) {
            f[i] = 1;
            if (i && f[i - 1]) {
                continue;
            }
            if (i + 1 < N && f[i + 1]) {
                continue;
            }
            ans++;
        }
        return ans;
    }
    vector<int> lg(N + 1);
    for (int i = 2; i <= N; i++) {
        lg[i] = lg[i / 2] + 1;
    }
    vector st(N, vector<int>(lg[N] + 1));
    for (int i = 0; i < N; i++) {
        st[i][0] = H[i];
    }
    for (int j = 0; j < lg[N]; j++) {
        for (int i = 0; i + (2 << j) <= N; i++) {
            st[i][j + 1] = max(st[i][j], st[i + (1 << j)][j]);
        }
    }
    auto query = [&](int l, int r) {
        if (l == r) {
            return 0;
        }
        int k = lg[r - l];
        return max(st[l][k], st[r - (1 << k)][k]);
    };
    vector<int> l(N, -1), r(N, N);
    for (int i = 0; i < N; i++) {
        if (query(0, i) >= H[i] + D) {
            int lo = 0, hi = i - 1;
            while (lo < hi) {
                int mi = (lo + hi + 1) / 2;
                if (query(mi, i) >= H[i] + D) {
                    lo = mi;
                } else {
                    hi = mi - 1;
                }
            }
            l[i] = lo;
        }
        if (query(i + 1, N) >= H[i] + D) {
            int lo = i + 1, hi = N - 1;
            while (lo < hi) {
                int mi = (lo + hi) / 2;
                if (query(i + 1, mi + 1) >= H[i] + D) {
                    hi = mi;
                } else {
                    lo = mi + 1;
                }
            }
            r[i] = lo;
        }
    }
    vector<int> dp(N + 1), t(N + 1);
    for (int i = L; i <= R; i++) {
        t[i + 1] = max(t[i + 1], t[i]);
        dp[i + 1] = max(dp[i], t[l[i] + 1] + 1);
        if (r[i] < N) {
            t[r[i] + 1] = max(t[r[i] + 1], dp[i + 1]);
        }
    }
    return dp[R + 1];
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 391 ms 920 KB Output is correct
2 Correct 715 ms 1452 KB Output is correct
3 Correct 622 ms 1460 KB Output is correct
4 Correct 817 ms 1360 KB Output is correct
5 Correct 771 ms 1360 KB Output is correct
6 Correct 711 ms 1436 KB Output is correct
7 Correct 599 ms 1456 KB Output is correct
8 Correct 0 ms 208 KB Output is correct
9 Correct 1 ms 208 KB Output is correct
10 Correct 0 ms 208 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 1 ms 464 KB Output is correct
3 Correct 1 ms 464 KB Output is correct
4 Correct 1 ms 464 KB Output is correct
5 Correct 1 ms 464 KB Output is correct
6 Correct 1 ms 512 KB Output is correct
7 Correct 1 ms 464 KB Output is correct
8 Correct 1 ms 208 KB Output is correct
9 Correct 0 ms 208 KB Output is correct
10 Correct 1 ms 464 KB Output is correct
11 Correct 1 ms 464 KB Output is correct
12 Correct 0 ms 208 KB Output is correct
13 Correct 0 ms 208 KB Output is correct
14 Correct 0 ms 208 KB Output is correct
15 Correct 0 ms 208 KB Output is correct
16 Correct 1 ms 208 KB Output is correct
17 Correct 1 ms 208 KB Output is correct
18 Correct 1 ms 208 KB Output is correct
19 Correct 1 ms 208 KB Output is correct
20 Correct 1 ms 208 KB Output is correct
21 Correct 1 ms 208 KB Output is correct
22 Correct 1 ms 208 KB Output is correct
23 Correct 1 ms 208 KB Output is correct
24 Correct 0 ms 208 KB Output is correct
25 Correct 1 ms 336 KB Output is correct
26 Correct 1 ms 464 KB Output is correct
27 Correct 1 ms 464 KB Output is correct
28 Correct 1 ms 464 KB Output is correct
29 Correct 1 ms 464 KB Output is correct
30 Correct 1 ms 464 KB Output is correct
31 Correct 1 ms 464 KB Output is correct
32 Correct 1 ms 208 KB Output is correct
33 Correct 0 ms 208 KB Output is correct
34 Correct 1 ms 464 KB Output is correct
35 Correct 1 ms 464 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 1 ms 464 KB Output is correct
3 Correct 1 ms 464 KB Output is correct
4 Correct 1 ms 464 KB Output is correct
5 Correct 1 ms 464 KB Output is correct
6 Correct 1 ms 512 KB Output is correct
7 Correct 1 ms 464 KB Output is correct
8 Correct 1 ms 208 KB Output is correct
9 Correct 0 ms 208 KB Output is correct
10 Correct 1 ms 464 KB Output is correct
11 Correct 1 ms 464 KB Output is correct
12 Correct 0 ms 208 KB Output is correct
13 Correct 0 ms 208 KB Output is correct
14 Correct 0 ms 208 KB Output is correct
15 Correct 0 ms 208 KB Output is correct
16 Correct 1 ms 208 KB Output is correct
17 Correct 1 ms 208 KB Output is correct
18 Correct 1 ms 208 KB Output is correct
19 Correct 1 ms 208 KB Output is correct
20 Correct 1 ms 208 KB Output is correct
21 Correct 1 ms 208 KB Output is correct
22 Correct 1 ms 208 KB Output is correct
23 Correct 1 ms 208 KB Output is correct
24 Correct 0 ms 208 KB Output is correct
25 Correct 1 ms 336 KB Output is correct
26 Correct 1 ms 464 KB Output is correct
27 Correct 1 ms 464 KB Output is correct
28 Correct 1 ms 464 KB Output is correct
29 Correct 1 ms 464 KB Output is correct
30 Correct 1 ms 464 KB Output is correct
31 Correct 1 ms 464 KB Output is correct
32 Correct 1 ms 208 KB Output is correct
33 Correct 0 ms 208 KB Output is correct
34 Correct 1 ms 464 KB Output is correct
35 Correct 1 ms 464 KB Output is correct
36 Correct 27 ms 8648 KB Output is correct
37 Correct 32 ms 13076 KB Output is correct
38 Correct 40 ms 13188 KB Output is correct
39 Correct 24 ms 13092 KB Output is correct
40 Correct 51 ms 13320 KB Output is correct
41 Correct 43 ms 13072 KB Output is correct
42 Correct 44 ms 13120 KB Output is correct
43 Correct 16 ms 1360 KB Output is correct
44 Correct 8 ms 1436 KB Output is correct
45 Correct 24 ms 13120 KB Output is correct
46 Correct 33 ms 13192 KB Output is correct
47 Correct 12 ms 1440 KB Output is correct
48 Correct 13 ms 1452 KB Output is correct
49 Correct 9 ms 1448 KB Output is correct
50 Correct 15 ms 1448 KB Output is correct
51 Correct 9 ms 1360 KB Output is correct
52 Correct 24 ms 1476 KB Output is correct
53 Correct 16 ms 1440 KB Output is correct
54 Correct 16 ms 1488 KB Output is correct
55 Correct 16 ms 1488 KB Output is correct
56 Correct 17 ms 1452 KB Output is correct
57 Correct 49 ms 12712 KB Output is correct
58 Correct 45 ms 13188 KB Output is correct
59 Correct 50 ms 13092 KB Output is correct
60 Correct 52 ms 13188 KB Output is correct
61 Correct 46 ms 13192 KB Output is correct
62 Correct 46 ms 13184 KB Output is correct
63 Correct 50 ms 13188 KB Output is correct
64 Correct 13 ms 1452 KB Output is correct
65 Correct 12 ms 1464 KB Output is correct
66 Correct 39 ms 13196 KB Output is correct
67 Correct 33 ms 13144 KB Output is correct

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4042 ms 1460 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 17.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4048 ms 3520 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 208 KB Output is correct
2 Correct 1 ms 464 KB Output is correct
3 Correct 1 ms 464 KB Output is correct
4 Correct 1 ms 464 KB Output is correct
5 Correct 1 ms 464 KB Output is correct
6 Correct 1 ms 512 KB Output is correct
7 Correct 1 ms 464 KB Output is correct
8 Correct 1 ms 208 KB Output is correct
9 Correct 0 ms 208 KB Output is correct
10 Correct 1 ms 464 KB Output is correct
11 Correct 1 ms 464 KB Output is correct
12 Correct 0 ms 208 KB Output is correct
13 Correct 0 ms 208 KB Output is correct
14 Correct 0 ms 208 KB Output is correct
15 Correct 0 ms 208 KB Output is correct
16 Correct 1 ms 208 KB Output is correct
17 Correct 1 ms 208 KB Output is correct
18 Correct 1 ms 208 KB Output is correct
19 Correct 1 ms 208 KB Output is correct
20 Correct 1 ms 208 KB Output is correct
21 Correct 1 ms 208 KB Output is correct
22 Correct 1 ms 208 KB Output is correct
23 Correct 1 ms 208 KB Output is correct
24 Correct 0 ms 208 KB Output is correct
25 Correct 1 ms 336 KB Output is correct
26 Correct 1 ms 464 KB Output is correct
27 Correct 1 ms 464 KB Output is correct
28 Correct 1 ms 464 KB Output is correct
29 Correct 1 ms 464 KB Output is correct
30 Correct 1 ms 464 KB Output is correct
31 Correct 1 ms 464 KB Output is correct
32 Correct 1 ms 208 KB Output is correct
33 Correct 0 ms 208 KB Output is correct
34 Correct 1 ms 464 KB Output is correct
35 Correct 1 ms 464 KB Output is correct
36 Correct 27 ms 8648 KB Output is correct
37 Correct 32 ms 13076 KB Output is correct
38 Correct 40 ms 13188 KB Output is correct
39 Correct 24 ms 13092 KB Output is correct
40 Correct 51 ms 13320 KB Output is correct
41 Correct 43 ms 13072 KB Output is correct
42 Correct 44 ms 13120 KB Output is correct
43 Correct 16 ms 1360 KB Output is correct
44 Correct 8 ms 1436 KB Output is correct
45 Correct 24 ms 13120 KB Output is correct
46 Correct 33 ms 13192 KB Output is correct
47 Correct 12 ms 1440 KB Output is correct
48 Correct 13 ms 1452 KB Output is correct
49 Correct 9 ms 1448 KB Output is correct
50 Correct 15 ms 1448 KB Output is correct
51 Correct 9 ms 1360 KB Output is correct
52 Correct 24 ms 1476 KB Output is correct
53 Correct 16 ms 1440 KB Output is correct
54 Correct 16 ms 1488 KB Output is correct
55 Correct 16 ms 1488 KB Output is correct
56 Correct 17 ms 1452 KB Output is correct
57 Correct 49 ms 12712 KB Output is correct
58 Correct 45 ms 13188 KB Output is correct
59 Correct 50 ms 13092 KB Output is correct
60 Correct 52 ms 13188 KB Output is correct
61 Correct 46 ms 13192 KB Output is correct
62 Correct 46 ms 13184 KB Output is correct
63 Correct 50 ms 13188 KB Output is correct
64 Correct 13 ms 1452 KB Output is correct
65 Correct 12 ms 1464 KB Output is correct
66 Correct 39 ms 13196 KB Output is correct
67 Correct 33 ms 13144 KB Output is correct
68 Execution timed out 4042 ms 1460 KB Time limit exceeded
69 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 391 ms 920 KB Output is correct
2 Correct 715 ms 1452 KB Output is correct
3 Correct 622 ms 1460 KB Output is correct
4 Correct 817 ms 1360 KB Output is correct
5 Correct 771 ms 1360 KB Output is correct
6 Correct 711 ms 1436 KB Output is correct
7 Correct 599 ms 1456 KB Output is correct
8 Correct 0 ms 208 KB Output is correct
9 Correct 1 ms 208 KB Output is correct
10 Correct 0 ms 208 KB Output is correct
11 Correct 0 ms 208 KB Output is correct
12 Correct 1 ms 464 KB Output is correct
13 Correct 1 ms 464 KB Output is correct
14 Correct 1 ms 464 KB Output is correct
15 Correct 1 ms 464 KB Output is correct
16 Correct 1 ms 512 KB Output is correct
17 Correct 1 ms 464 KB Output is correct
18 Correct 1 ms 208 KB Output is correct
19 Correct 0 ms 208 KB Output is correct
20 Correct 1 ms 464 KB Output is correct
21 Correct 1 ms 464 KB Output is correct
22 Correct 0 ms 208 KB Output is correct
23 Correct 0 ms 208 KB Output is correct
24 Correct 0 ms 208 KB Output is correct
25 Correct 0 ms 208 KB Output is correct
26 Correct 1 ms 208 KB Output is correct
27 Correct 1 ms 208 KB Output is correct
28 Correct 1 ms 208 KB Output is correct
29 Correct 1 ms 208 KB Output is correct
30 Correct 1 ms 208 KB Output is correct
31 Correct 1 ms 208 KB Output is correct
32 Correct 1 ms 208 KB Output is correct
33 Correct 1 ms 208 KB Output is correct
34 Correct 0 ms 208 KB Output is correct
35 Correct 1 ms 336 KB Output is correct
36 Correct 1 ms 464 KB Output is correct
37 Correct 1 ms 464 KB Output is correct
38 Correct 1 ms 464 KB Output is correct
39 Correct 1 ms 464 KB Output is correct
40 Correct 1 ms 464 KB Output is correct
41 Correct 1 ms 464 KB Output is correct
42 Correct 1 ms 208 KB Output is correct
43 Correct 0 ms 208 KB Output is correct
44 Correct 1 ms 464 KB Output is correct
45 Correct 1 ms 464 KB Output is correct
46 Correct 27 ms 8648 KB Output is correct
47 Correct 32 ms 13076 KB Output is correct
48 Correct 40 ms 13188 KB Output is correct
49 Correct 24 ms 13092 KB Output is correct
50 Correct 51 ms 13320 KB Output is correct
51 Correct 43 ms 13072 KB Output is correct
52 Correct 44 ms 13120 KB Output is correct
53 Correct 16 ms 1360 KB Output is correct
54 Correct 8 ms 1436 KB Output is correct
55 Correct 24 ms 13120 KB Output is correct
56 Correct 33 ms 13192 KB Output is correct
57 Correct 12 ms 1440 KB Output is correct
58 Correct 13 ms 1452 KB Output is correct
59 Correct 9 ms 1448 KB Output is correct
60 Correct 15 ms 1448 KB Output is correct
61 Correct 9 ms 1360 KB Output is correct
62 Correct 24 ms 1476 KB Output is correct
63 Correct 16 ms 1440 KB Output is correct
64 Correct 16 ms 1488 KB Output is correct
65 Correct 16 ms 1488 KB Output is correct
66 Correct 17 ms 1452 KB Output is correct
67 Correct 49 ms 12712 KB Output is correct
68 Correct 45 ms 13188 KB Output is correct
69 Correct 50 ms 13092 KB Output is correct
70 Correct 52 ms 13188 KB Output is correct
71 Correct 46 ms 13192 KB Output is correct
72 Correct 46 ms 13184 KB Output is correct
73 Correct 50 ms 13188 KB Output is correct
74 Correct 13 ms 1452 KB Output is correct
75 Correct 12 ms 1464 KB Output is correct
76 Correct 39 ms 13196 KB Output is correct
77 Correct 33 ms 13144 KB Output is correct
78 Execution timed out 4042 ms 1460 KB Time limit exceeded
79 Halted 0 ms 0 KB -