oj.uz

Submission #798483

# Submission time Handle Problem Language Result Execution time Memory
798483 2023-07-30T18:26:25 Z PanosPask None (JOI16_matryoshka) C++14
100 / 100
 145 ms 14484 KB 
#include <bits/stdc++.h>

using namespace std;

const int INF = 1e9 + 1;

typedef pair<int, int> pi;

struct Doll {
    int diameter;
    int height;
};
bool operator < (const Doll& a, const Doll& b)
{
    if (a.height == b.height)
        return a.diameter > b.diameter;
    return a.height < b.height;
}

int N, Q;
vector<Doll> dolls;
vector<pair<pi, int>> queries;
// dp[i]: Maximum diameter of matryoshka doll at each time step
vector<int> dp;
vector<int> ans;

bool gcomp(const int& a, const int& b)
{
    return a > b;
}

void process_query(int v)
{
    // Only take dolls with diameter as required
    int res = upper_bound(dp.begin(), dp.end(), queries[v].first.first, gcomp) - dp.begin();

    // All dolls at position res and above have diameter smaller than required queries[cur_]

    ans[queries[v].second] = res - 1;
}

int main(void)
{
    scanf("%d %d", &N, &Q);

    dolls.resize(N);
    queries.resize(Q);
    ans.resize(Q);
    dp.resize(N + 1, 0);
    for (int i = 0; i < N; i++) {
        scanf("%d %d", &dolls[i].diameter, &dolls[i].height);
    }
    for (int i = 0; i < Q; i++) {
        scanf("%d %d", &queries[i].first.first, &queries[i].first.second);
        queries[i].second = i;
    }

    sort(dolls.begin(), dolls.end());
    sort(queries.begin(), queries.end(), [] (pair<pi, int> a, pair<pi, int> b) {return a.first.second < b.first.second;});

    int reached = 0;
    dp[0] = INF;
    int cur_query = 0;
    for (int i = 0; i < N; i++) {
        while (cur_query < Q && queries[cur_query].first.second < dolls[i].height) {
            process_query(cur_query);
            cur_query++;
        }


        /* A pair of dolls (i, j) after sorting do NOT fit inside one another iff
         * i < j => diameter(i) >= diameter(j)
         */

        int pos = upper_bound(dp.begin(), dp.end(), dolls[i].diameter, gcomp) - dp.begin();
        dp[pos] = dolls[i].diameter;
        reached = max(reached, pos);
    }
    while (cur_query < Q) {
        process_query(cur_query);
        cur_query++;
    }

    for (int i = 0; i < Q; i++)
        printf("%d\n", ans[i]);

    return 0;
}

Compilation message

matryoshka.cpp: In function 'int main()':
matryoshka.cpp:44:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |     scanf("%d %d", &N, &Q);
      |     ~~~~~^~~~~~~~~~~~~~~~~
matryoshka.cpp:51:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |         scanf("%d %d", &dolls[i].diameter, &dolls[i].height);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
matryoshka.cpp:54:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   54 |         scanf("%d %d", &queries[i].first.first, &queries[i].first.second);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 300 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 324 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 300 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 324 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 304 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 304 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 304 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 300 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 324 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 304 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 304 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 304 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 2 ms 444 KB Output is correct
24 Correct 2 ms 340 KB Output is correct
25 Correct 2 ms 340 KB Output is correct
26 Correct 2 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 2 ms 340 KB Output is correct
29 Correct 2 ms 340 KB Output is correct
30 Correct 1 ms 316 KB Output is correct
31 Correct 2 ms 340 KB Output is correct
32 Correct 2 ms 340 KB Output is correct
33 Correct 2 ms 340 KB Output is correct
34 Correct 2 ms 440 KB Output is correct
35 Correct 2 ms 340 KB Output is correct

Subtask #4
49.0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 300 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 324 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 304 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 304 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 304 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 2 ms 444 KB Output is correct
24 Correct 2 ms 340 KB Output is correct
25 Correct 2 ms 340 KB Output is correct
26 Correct 2 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 2 ms 340 KB Output is correct
29 Correct 2 ms 340 KB Output is correct
30 Correct 1 ms 316 KB Output is correct
31 Correct 2 ms 340 KB Output is correct
32 Correct 2 ms 340 KB Output is correct
33 Correct 2 ms 340 KB Output is correct
34 Correct 2 ms 440 KB Output is correct
35 Correct 2 ms 340 KB Output is correct
36 Correct 130 ms 11664 KB Output is correct
37 Correct 124 ms 10972 KB Output is correct
38 Correct 45 ms 4684 KB Output is correct
39 Correct 106 ms 9348 KB Output is correct
40 Correct 132 ms 9856 KB Output is correct
41 Correct 122 ms 10828 KB Output is correct
42 Correct 101 ms 8576 KB Output is correct
43 Correct 85 ms 8716 KB Output is correct
44 Correct 137 ms 14256 KB Output is correct
45 Correct 137 ms 14216 KB Output is correct
46 Correct 139 ms 14248 KB Output is correct
47 Correct 132 ms 13972 KB Output is correct
48 Correct 145 ms 14484 KB Output is correct
49 Correct 130 ms 13968 KB Output is correct
50 Correct 135 ms 14392 KB Output is correct