oj.uz

Submission #785329

# Submission time Handle Problem Language Result Execution time Memory
785329 2023-07-17T08:24:21 Z vjudge1 Radio Towers (IOI22_towers) C++17
27 / 100
 4000 ms 15016 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) {
        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 256 ms 928 KB Output is correct
2 Correct 660 ms 1440 KB Output is correct
3 Correct 678 ms 1440 KB Output is correct
4 Correct 777 ms 1360 KB Output is correct
5 Correct 624 ms 1360 KB Output is correct
6 Correct 695 ms 1460 KB Output is correct
7 Correct 699 ms 1360 KB Output is correct
8 Correct 1 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 336 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 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 0 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 1 ms 464 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 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 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 336 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 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 0 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 1 ms 464 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 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 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 30 ms 8648 KB Output is correct
37 Correct 33 ms 13184 KB Output is correct
38 Correct 46 ms 13188 KB Output is correct
39 Correct 26 ms 13076 KB Output is correct
40 Correct 51 ms 13188 KB Output is correct
41 Correct 48 ms 13188 KB Output is correct
42 Correct 58 ms 13096 KB Output is correct
43 Correct 11 ms 1444 KB Output is correct
44 Correct 9 ms 1488 KB Output is correct
45 Correct 24 ms 13120 KB Output is correct
46 Correct 35 ms 13192 KB Output is correct
47 Correct 26 ms 11552 KB Output is correct
48 Correct 20 ms 11560 KB Output is correct
49 Correct 20 ms 11588 KB Output is correct
50 Correct 14 ms 1448 KB Output is correct
51 Correct 21 ms 13064 KB Output is correct
52 Correct 26 ms 11564 KB Output is correct
53 Correct 28 ms 11560 KB Output is correct
54 Correct 20 ms 11656 KB Output is correct
55 Correct 9 ms 1440 KB Output is correct
56 Correct 23 ms 15016 KB Output is correct
57 Correct 35 ms 12700 KB Output is correct
58 Correct 42 ms 13196 KB Output is correct
59 Correct 60 ms 13184 KB Output is correct
60 Correct 52 ms 13120 KB Output is correct
61 Correct 49 ms 13188 KB Output is correct
62 Correct 43 ms 13172 KB Output is correct
63 Correct 47 ms 13096 KB Output is correct
64 Correct 9 ms 1360 KB Output is correct
65 Correct 9 ms 1448 KB Output is correct
66 Correct 39 ms 13096 KB Output is correct
67 Correct 24 ms 13188 KB Output is correct

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4103 ms 11872 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 4027 ms 3528 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 336 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 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 0 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 1 ms 464 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 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 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 30 ms 8648 KB Output is correct
37 Correct 33 ms 13184 KB Output is correct
38 Correct 46 ms 13188 KB Output is correct
39 Correct 26 ms 13076 KB Output is correct
40 Correct 51 ms 13188 KB Output is correct
41 Correct 48 ms 13188 KB Output is correct
42 Correct 58 ms 13096 KB Output is correct
43 Correct 11 ms 1444 KB Output is correct
44 Correct 9 ms 1488 KB Output is correct
45 Correct 24 ms 13120 KB Output is correct
46 Correct 35 ms 13192 KB Output is correct
47 Correct 26 ms 11552 KB Output is correct
48 Correct 20 ms 11560 KB Output is correct
49 Correct 20 ms 11588 KB Output is correct
50 Correct 14 ms 1448 KB Output is correct
51 Correct 21 ms 13064 KB Output is correct
52 Correct 26 ms 11564 KB Output is correct
53 Correct 28 ms 11560 KB Output is correct
54 Correct 20 ms 11656 KB Output is correct
55 Correct 9 ms 1440 KB Output is correct
56 Correct 23 ms 15016 KB Output is correct
57 Correct 35 ms 12700 KB Output is correct
58 Correct 42 ms 13196 KB Output is correct
59 Correct 60 ms 13184 KB Output is correct
60 Correct 52 ms 13120 KB Output is correct
61 Correct 49 ms 13188 KB Output is correct
62 Correct 43 ms 13172 KB Output is correct
63 Correct 47 ms 13096 KB Output is correct
64 Correct 9 ms 1360 KB Output is correct
65 Correct 9 ms 1448 KB Output is correct
66 Correct 39 ms 13096 KB Output is correct
67 Correct 24 ms 13188 KB Output is correct
68 Execution timed out 4103 ms 11872 KB Time limit exceeded
69 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 256 ms 928 KB Output is correct
2 Correct 660 ms 1440 KB Output is correct
3 Correct 678 ms 1440 KB Output is correct
4 Correct 777 ms 1360 KB Output is correct
5 Correct 624 ms 1360 KB Output is correct
6 Correct 695 ms 1460 KB Output is correct
7 Correct 699 ms 1360 KB Output is correct
8 Correct 1 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 336 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 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 0 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 1 ms 464 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 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 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 30 ms 8648 KB Output is correct
47 Correct 33 ms 13184 KB Output is correct
48 Correct 46 ms 13188 KB Output is correct
49 Correct 26 ms 13076 KB Output is correct
50 Correct 51 ms 13188 KB Output is correct
51 Correct 48 ms 13188 KB Output is correct
52 Correct 58 ms 13096 KB Output is correct
53 Correct 11 ms 1444 KB Output is correct
54 Correct 9 ms 1488 KB Output is correct
55 Correct 24 ms 13120 KB Output is correct
56 Correct 35 ms 13192 KB Output is correct
57 Correct 26 ms 11552 KB Output is correct
58 Correct 20 ms 11560 KB Output is correct
59 Correct 20 ms 11588 KB Output is correct
60 Correct 14 ms 1448 KB Output is correct
61 Correct 21 ms 13064 KB Output is correct
62 Correct 26 ms 11564 KB Output is correct
63 Correct 28 ms 11560 KB Output is correct
64 Correct 20 ms 11656 KB Output is correct
65 Correct 9 ms 1440 KB Output is correct
66 Correct 23 ms 15016 KB Output is correct
67 Correct 35 ms 12700 KB Output is correct
68 Correct 42 ms 13196 KB Output is correct
69 Correct 60 ms 13184 KB Output is correct
70 Correct 52 ms 13120 KB Output is correct
71 Correct 49 ms 13188 KB Output is correct
72 Correct 43 ms 13172 KB Output is correct
73 Correct 47 ms 13096 KB Output is correct
74 Correct 9 ms 1360 KB Output is correct
75 Correct 9 ms 1448 KB Output is correct
76 Correct 39 ms 13096 KB Output is correct
77 Correct 24 ms 13188 KB Output is correct
78 Execution timed out 4103 ms 11872 KB Time limit exceeded
79 Halted 0 ms 0 KB -