oj.uz

Submission #1072488

# Submission time Handle Problem Language Result Execution time Memory
1072488 2024-08-23T20:05:14 Z vjudge1 Radio Towers (IOI22_towers) C++17
23 / 100
 4000 ms 6352 KB 
#include "towers.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vll = vector <ll>;
using ii = pair <ll, ll>;
using vii = vector <ii>;
using vi = vector <int>;

ll n, k;
vll ve;
void init (int n, vi ve) {
    ::n = n;
    k = 0;
    ::ve = vll(ve.begin(), ve.end());
    while (ve[k] < ve[k+1]) k++;
}

const ll MAXN = 1E5+16;
ll dp[2][MAXN];
ll dpPs[2][MAXN];
// dp[0] low
// dp[1] up
int max_towers (int ql, int qr, int d) {
    // fill(dp+ql, dp+qr+1, 0);
    // cerr << d << '\n';
    // for (ll i = ql; i <= qr; i++) {
    //     ii maxN = { 0, -16 };
    //     dp[i] = 1;
    //     for (ll j = i-1; j >= ql; j--) {
    //         if (ve[i] <= maxN.first-d)
    //             if (ve[j] <= maxN.first-d) {
    //                 dp[i] = max(dp[i], dp[j]+1);
    //             }
    //         maxN = max(maxN, ii{ ve[j], j });
    //     }
    //     // cerr << ve[i] << ": " << dp[i] << '\n';
    // }
    // return *max_element(dp+ql, dp+qr+1);


    // fill(dp+ql, dp+qr+1, 0);
    deque <ii> dqUp, dqDw;
    // dqUp sorted increasing
    // dqDw sorted decreasing
    for (ll i = ql; i <= qr; i++) {
        dp[0][i] = 1;
        dp[1][i] = 0;
        while (dqUp.size() && dqUp.front().first < ve[i]) dqUp.pop_front();
        while (dqDw.size() && dqDw.front().first > ve[i]) dqDw.pop_front();
        // if (j < dq.size()) dp[i] = max(dp[i], dq[j].second+1);
        // cerr << ve[i] << ": " << dp[i] << '\n';
        // cerr << "j " << j << "  ";
        // for (auto [v1, v2] : dqUp) cerr << v1 << ' ' << v2 << "  ";
        // cerr << '\n';
        // for (auto [v1, v2] : dqDw) cerr << v1 << ' ' << v2 << "  ";
        // cerr << '\n';
        // cerr << '\n';
        auto itUp = lower_bound(dqUp.begin(), dqUp.end(), ii{ ve[i]+d, 0 });
        // for (auto [v, j] : dqUp) {
        //     if (ve[j] < ve[i]+d) continue;
        //     dp[0][i] = max(dp[0][i], dpPs[1][j]+1);
        //     assert(jUp == j);
        //     break;
        // }
            if (itUp != dqUp.end()) dp[0][i] = max(dp[0][i], dpPs[1][itUp->second]+1);
        // cerr << jUp << ' ';
        auto itDw = lower_bound(dqDw.begin(), dqDw.end(), ii{ ve[i]-d, 1E9 }, [&](ii a, ii b) { return a > b; });
        // for (auto [v, j] : dqDw) {
        //     if (ve[j] > ve[i]-d) continue;
        //     dp[1][i] = max(dp[1][i], dpPs[0][j]+1);
        //     assert(jDw == j);
        //     break;
        // }
            if (itDw != dqDw.end()) dp[1][i] = max(dp[1][i], dpPs[0][itDw->second]+1);
        // cerr << '\n';
        dpPs[1][i] = max(dp[1][i], dqUp.size() ? dpPs[1][dqUp.front().second] : 0);
        dqUp.push_front({ ve[i], i });
        dpPs[0][i] = max(dp[0][i], dqDw.size() ? dpPs[0][dqDw.front().second] : 0);
        dqDw.push_front({ ve[i], i });
        // ll j = ll(lower_bound(dqUp.begin(), dqUp.end(), ii{ ve[i]+d, 0 }) - dq.begin())+1;
        // for (ll j = i-1; j >= ql; j--) {
        //     if (ve[i] <= maxN.first-d)
        //         if (ve[j] <= maxN.first-d) dp[i] = max(dp[i], dp[j]+1);
        //     maxN = max(maxN, ii{ ve[j], j });
        // }
    }
    return (*max_element(dp[0]+ql, dp[0]+qr+1)+1)/2;
}

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4062 ms 3880 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 512 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 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 0 ms 344 KB Output is correct
16 Correct 0 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 0 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 0 ms 344 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 0 ms 344 KB Output is correct
28 Correct 1 ms 596 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 1 ms 344 KB Output is correct
34 Correct 0 ms 344 KB Output is correct
35 Correct 1 ms 344 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 512 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 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 0 ms 344 KB Output is correct
16 Correct 0 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 0 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 0 ms 344 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 0 ms 344 KB Output is correct
28 Correct 1 ms 596 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 1 ms 344 KB Output is correct
34 Correct 0 ms 344 KB Output is correct
35 Correct 1 ms 344 KB Output is correct
36 Correct 7 ms 1624 KB Output is correct
37 Correct 11 ms 2760 KB Output is correct
38 Correct 11 ms 2000 KB Output is correct
39 Correct 10 ms 2504 KB Output is correct
40 Correct 13 ms 2000 KB Output is correct
41 Correct 15 ms 4048 KB Output is correct
42 Correct 9 ms 1976 KB Output is correct
43 Correct 20 ms 4048 KB Output is correct
44 Correct 10 ms 2244 KB Output is correct
45 Correct 9 ms 1880 KB Output is correct
46 Correct 12 ms 1872 KB Output is correct
47 Correct 12 ms 2512 KB Output is correct
48 Correct 16 ms 2256 KB Output is correct
49 Correct 10 ms 1880 KB Output is correct
50 Correct 10 ms 2692 KB Output is correct
51 Correct 18 ms 3520 KB Output is correct
52 Correct 14 ms 4560 KB Output is correct
53 Correct 13 ms 4656 KB Output is correct
54 Correct 19 ms 4560 KB Output is correct
55 Correct 20 ms 6352 KB Output is correct
56 Correct 15 ms 5352 KB Output is correct
57 Correct 14 ms 4572 KB Output is correct
58 Correct 14 ms 4544 KB Output is correct
59 Correct 14 ms 4560 KB Output is correct
60 Correct 15 ms 4560 KB Output is correct
61 Correct 14 ms 4560 KB Output is correct
62 Correct 14 ms 4644 KB Output is correct
63 Correct 14 ms 4560 KB Output is correct
64 Correct 18 ms 6188 KB Output is correct
65 Correct 18 ms 6352 KB Output is correct
66 Correct 18 ms 5584 KB Output is correct
67 Correct 21 ms 6096 KB Output is correct

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4094 ms 4716 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 4021 ms 1368 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 512 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 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 0 ms 344 KB Output is correct
16 Correct 0 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 0 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 0 ms 344 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 0 ms 344 KB Output is correct
28 Correct 1 ms 596 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 1 ms 344 KB Output is correct
34 Correct 0 ms 344 KB Output is correct
35 Correct 1 ms 344 KB Output is correct
36 Correct 7 ms 1624 KB Output is correct
37 Correct 11 ms 2760 KB Output is correct
38 Correct 11 ms 2000 KB Output is correct
39 Correct 10 ms 2504 KB Output is correct
40 Correct 13 ms 2000 KB Output is correct
41 Correct 15 ms 4048 KB Output is correct
42 Correct 9 ms 1976 KB Output is correct
43 Correct 20 ms 4048 KB Output is correct
44 Correct 10 ms 2244 KB Output is correct
45 Correct 9 ms 1880 KB Output is correct
46 Correct 12 ms 1872 KB Output is correct
47 Correct 12 ms 2512 KB Output is correct
48 Correct 16 ms 2256 KB Output is correct
49 Correct 10 ms 1880 KB Output is correct
50 Correct 10 ms 2692 KB Output is correct
51 Correct 18 ms 3520 KB Output is correct
52 Correct 14 ms 4560 KB Output is correct
53 Correct 13 ms 4656 KB Output is correct
54 Correct 19 ms 4560 KB Output is correct
55 Correct 20 ms 6352 KB Output is correct
56 Correct 15 ms 5352 KB Output is correct
57 Correct 14 ms 4572 KB Output is correct
58 Correct 14 ms 4544 KB Output is correct
59 Correct 14 ms 4560 KB Output is correct
60 Correct 15 ms 4560 KB Output is correct
61 Correct 14 ms 4560 KB Output is correct
62 Correct 14 ms 4644 KB Output is correct
63 Correct 14 ms 4560 KB Output is correct
64 Correct 18 ms 6188 KB Output is correct
65 Correct 18 ms 6352 KB Output is correct
66 Correct 18 ms 5584 KB Output is correct
67 Correct 21 ms 6096 KB Output is correct
68 Execution timed out 4094 ms 4716 KB Time limit exceeded
69 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4062 ms 3880 KB Time limit exceeded
2 Halted 0 ms 0 KB -