oj.uz

Submission #785326

# Submission time Handle Problem Language Result Execution time Memory
785326 2023-07-17T08:23:09 Z vjudge1 Radio Towers (IOI22_towers) C++17
27 / 100
 4000 ms 13204 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;
    }
    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] = i;
    }
    auto f = [&](int i, int j) {
        if (i == -1) {
            return j;
        }
        if (j == -1) {
            return i;
        }
        return H[i] > H[j] ? i : j;
    };
    for (int j = 0; j < lg[N]; j++) {
        for (int i = 0; i + (2 << j) <= N; i++) {
            st[i][j + 1] = f(st[i][j], st[i + (1 << j)][j]);
        }
    }
    auto query = [&](int l, int r) {
        if (l == r) {
            return -1;
        }
        int k = lg[r - l];
        return f(st[l][k], st[r - (1 << k)][k]);
    };
    if (D == 1 && 0) {
        auto rec = [&](auto rec, int l, int r) -> int {
            if (l + 1 <= r) {
                return r - l;
            }
            int m = query(l, r);
            return rec(rec, l, m) + rec(rec, m + 1, r);
        };
        return rec(rec, L, R + 1);
    }
    vector<int> l(N, -1), r(N, N);
    for (int i = 0; i < N; i++) {
        if (H[query(0, i)] >= H[i] + D) {
            int lo = 0, hi = i - 1;
            while (lo < hi) {
                int mi = (lo + hi + 1) / 2;
                if (H[query(mi, i)] >= H[i] + D) {
                    lo = mi;
                } else {
                    hi = mi - 1;
                }
            }
            l[i] = lo;
        }
        if (H[query(i + 1, N)] >= H[i] + D) {
            int lo = i + 1, hi = N - 1;
            while (lo < hi) {
                int mi = (lo + hi) / 2;
                if (H[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 356 ms 976 KB Output is correct
2 Correct 634 ms 1464 KB Output is correct
3 Correct 571 ms 1360 KB Output is correct
4 Correct 447 ms 1440 KB Output is correct
5 Correct 669 ms 1468 KB Output is correct
6 Correct 740 ms 1360 KB Output is correct
7 Correct 799 ms 1468 KB Output is correct
8 Correct 0 ms 208 KB Output is correct
9 Correct 1 ms 208 KB Output is correct
10 Correct 1 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 512 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 476 KB Output is correct
6 Correct 1 ms 464 KB Output is correct
7 Correct 1 ms 464 KB Output is correct
8 Correct 1 ms 208 KB Output is correct
9 Correct 1 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 1 ms 208 KB Output is correct
14 Correct 1 ms 208 KB Output is correct
15 Correct 1 ms 464 KB Output is correct
16 Correct 1 ms 464 KB Output is correct
17 Correct 2 ms 580 KB Output is correct
18 Correct 1 ms 208 KB Output is correct
19 Correct 1 ms 464 KB Output is correct
20 Correct 1 ms 464 KB Output is correct
21 Correct 1 ms 464 KB Output is correct
22 Correct 1 ms 464 KB Output is correct
23 Correct 1 ms 208 KB Output is correct
24 Correct 1 ms 464 KB Output is correct
25 Correct 0 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 1 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 512 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 476 KB Output is correct
6 Correct 1 ms 464 KB Output is correct
7 Correct 1 ms 464 KB Output is correct
8 Correct 1 ms 208 KB Output is correct
9 Correct 1 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 1 ms 208 KB Output is correct
14 Correct 1 ms 208 KB Output is correct
15 Correct 1 ms 464 KB Output is correct
16 Correct 1 ms 464 KB Output is correct
17 Correct 2 ms 580 KB Output is correct
18 Correct 1 ms 208 KB Output is correct
19 Correct 1 ms 464 KB Output is correct
20 Correct 1 ms 464 KB Output is correct
21 Correct 1 ms 464 KB Output is correct
22 Correct 1 ms 464 KB Output is correct
23 Correct 1 ms 208 KB Output is correct
24 Correct 1 ms 464 KB Output is correct
25 Correct 0 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 1 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 32 ms 8588 KB Output is correct
37 Correct 32 ms 13100 KB Output is correct
38 Correct 46 ms 13120 KB Output is correct
39 Correct 31 ms 13076 KB Output is correct
40 Correct 55 ms 13184 KB Output is correct
41 Correct 55 ms 13192 KB Output is correct
42 Correct 58 ms 13188 KB Output is correct
43 Correct 10 ms 1440 KB Output is correct
44 Correct 9 ms 1444 KB Output is correct
45 Correct 25 ms 13120 KB Output is correct
46 Correct 34 ms 13204 KB Output is correct
47 Correct 57 ms 13184 KB Output is correct
48 Correct 69 ms 13128 KB Output is correct
49 Correct 55 ms 13080 KB Output is correct
50 Correct 10 ms 1452 KB Output is correct
51 Correct 40 ms 13200 KB Output is correct
52 Correct 56 ms 13192 KB Output is correct
53 Correct 58 ms 13184 KB Output is correct
54 Correct 69 ms 13192 KB Output is correct
55 Correct 10 ms 1360 KB Output is correct
56 Correct 48 ms 13084 KB Output is correct
57 Correct 36 ms 12656 KB Output is correct
58 Correct 43 ms 13184 KB Output is correct
59 Correct 58 ms 13188 KB Output is correct
60 Correct 60 ms 13076 KB Output is correct
61 Correct 48 ms 13120 KB Output is correct
62 Correct 44 ms 13180 KB Output is correct
63 Correct 49 ms 13092 KB Output is correct
64 Correct 10 ms 1360 KB Output is correct
65 Correct 13 ms 1460 KB Output is correct
66 Correct 41 ms 13192 KB Output is correct
67 Correct 36 ms 13080 KB Output is correct

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4046 ms 13184 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 4019 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 512 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 476 KB Output is correct
6 Correct 1 ms 464 KB Output is correct
7 Correct 1 ms 464 KB Output is correct
8 Correct 1 ms 208 KB Output is correct
9 Correct 1 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 1 ms 208 KB Output is correct
14 Correct 1 ms 208 KB Output is correct
15 Correct 1 ms 464 KB Output is correct
16 Correct 1 ms 464 KB Output is correct
17 Correct 2 ms 580 KB Output is correct
18 Correct 1 ms 208 KB Output is correct
19 Correct 1 ms 464 KB Output is correct
20 Correct 1 ms 464 KB Output is correct
21 Correct 1 ms 464 KB Output is correct
22 Correct 1 ms 464 KB Output is correct
23 Correct 1 ms 208 KB Output is correct
24 Correct 1 ms 464 KB Output is correct
25 Correct 0 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 1 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 32 ms 8588 KB Output is correct
37 Correct 32 ms 13100 KB Output is correct
38 Correct 46 ms 13120 KB Output is correct
39 Correct 31 ms 13076 KB Output is correct
40 Correct 55 ms 13184 KB Output is correct
41 Correct 55 ms 13192 KB Output is correct
42 Correct 58 ms 13188 KB Output is correct
43 Correct 10 ms 1440 KB Output is correct
44 Correct 9 ms 1444 KB Output is correct
45 Correct 25 ms 13120 KB Output is correct
46 Correct 34 ms 13204 KB Output is correct
47 Correct 57 ms 13184 KB Output is correct
48 Correct 69 ms 13128 KB Output is correct
49 Correct 55 ms 13080 KB Output is correct
50 Correct 10 ms 1452 KB Output is correct
51 Correct 40 ms 13200 KB Output is correct
52 Correct 56 ms 13192 KB Output is correct
53 Correct 58 ms 13184 KB Output is correct
54 Correct 69 ms 13192 KB Output is correct
55 Correct 10 ms 1360 KB Output is correct
56 Correct 48 ms 13084 KB Output is correct
57 Correct 36 ms 12656 KB Output is correct
58 Correct 43 ms 13184 KB Output is correct
59 Correct 58 ms 13188 KB Output is correct
60 Correct 60 ms 13076 KB Output is correct
61 Correct 48 ms 13120 KB Output is correct
62 Correct 44 ms 13180 KB Output is correct
63 Correct 49 ms 13092 KB Output is correct
64 Correct 10 ms 1360 KB Output is correct
65 Correct 13 ms 1460 KB Output is correct
66 Correct 41 ms 13192 KB Output is correct
67 Correct 36 ms 13080 KB Output is correct
68 Execution timed out 4046 ms 13184 KB Time limit exceeded
69 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 356 ms 976 KB Output is correct
2 Correct 634 ms 1464 KB Output is correct
3 Correct 571 ms 1360 KB Output is correct
4 Correct 447 ms 1440 KB Output is correct
5 Correct 669 ms 1468 KB Output is correct
6 Correct 740 ms 1360 KB Output is correct
7 Correct 799 ms 1468 KB Output is correct
8 Correct 0 ms 208 KB Output is correct
9 Correct 1 ms 208 KB Output is correct
10 Correct 1 ms 208 KB Output is correct
11 Correct 0 ms 208 KB Output is correct
12 Correct 1 ms 512 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 476 KB Output is correct
16 Correct 1 ms 464 KB Output is correct
17 Correct 1 ms 464 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 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 1 ms 208 KB Output is correct
24 Correct 1 ms 208 KB Output is correct
25 Correct 1 ms 464 KB Output is correct
26 Correct 1 ms 464 KB Output is correct
27 Correct 2 ms 580 KB Output is correct
28 Correct 1 ms 208 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 464 KB Output is correct
33 Correct 1 ms 208 KB Output is correct
34 Correct 1 ms 464 KB Output is correct
35 Correct 0 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 1 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 32 ms 8588 KB Output is correct
47 Correct 32 ms 13100 KB Output is correct
48 Correct 46 ms 13120 KB Output is correct
49 Correct 31 ms 13076 KB Output is correct
50 Correct 55 ms 13184 KB Output is correct
51 Correct 55 ms 13192 KB Output is correct
52 Correct 58 ms 13188 KB Output is correct
53 Correct 10 ms 1440 KB Output is correct
54 Correct 9 ms 1444 KB Output is correct
55 Correct 25 ms 13120 KB Output is correct
56 Correct 34 ms 13204 KB Output is correct
57 Correct 57 ms 13184 KB Output is correct
58 Correct 69 ms 13128 KB Output is correct
59 Correct 55 ms 13080 KB Output is correct
60 Correct 10 ms 1452 KB Output is correct
61 Correct 40 ms 13200 KB Output is correct
62 Correct 56 ms 13192 KB Output is correct
63 Correct 58 ms 13184 KB Output is correct
64 Correct 69 ms 13192 KB Output is correct
65 Correct 10 ms 1360 KB Output is correct
66 Correct 48 ms 13084 KB Output is correct
67 Correct 36 ms 12656 KB Output is correct
68 Correct 43 ms 13184 KB Output is correct
69 Correct 58 ms 13188 KB Output is correct
70 Correct 60 ms 13076 KB Output is correct
71 Correct 48 ms 13120 KB Output is correct
72 Correct 44 ms 13180 KB Output is correct
73 Correct 49 ms 13092 KB Output is correct
74 Correct 10 ms 1360 KB Output is correct
75 Correct 13 ms 1460 KB Output is correct
76 Correct 41 ms 13192 KB Output is correct
77 Correct 36 ms 13080 KB Output is correct
78 Execution timed out 4046 ms 13184 KB Time limit exceeded
79 Halted 0 ms 0 KB -