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Submission #875351

# Submission time Handle Problem Language Result Execution time Memory
875351 2023-11-19T08:02:16 Z atom Examination (JOI19_examination) C++17
100 / 100
 636 ms 45216 KB 
#include "bits/stdc++.h"
// @JASPER'S BOILERPLATE
using namespace std;
using ll = long long;

#define fi first
#define se second
#ifdef JASPER
#include "debug.h"
#else
#define debug(...) 166
#endif

#define int long long

using pii = pair < int, int >;
const int INF = 2e9;
const int MOD = 1e9 + 7;
const int N = 2e5 + 5;

struct Fenwick {
    int n;
    vector <int> f;
    void init (int _n) {
        n = _n;
        f.resize(_n + 1);
    }
    int get(int x) {
        int ans = 0;
        for (; x >= 1; x -= x & -x)
            ans += f[x];
        return ans;
    }
    void upd(int x, int val) {
        for (; x <= n; x += x & -x)
            f[x] += val;
    } 
    int qry(int l) { return get(n) - get(l - 1); }
} fen;


int n, q;
int ans[N];
vector <vector <int>> queries;

void dnc(int l, int r) {
    if (l == r) return;

    int m = (l + r) / 2;
    dnc(l, m);
    dnc(m + 1, r);

    vector <vector <int>> qs;

    // Solving queries in the left
    for (int i = l; i <= m; ++i) {
        auto x = queries[i];
        if (x[3] == -1)
            qs.push_back({x[1], x[2], -1});
    }

    // Al < Am < Ar -> only take student in right to update 
    for (int i = m + 1; i <= r; ++i) {
        auto x = queries[i];
        if (x[3] != -1)
            qs.push_back({x[1], x[2], x[3]});
    }

    sort(qs.begin(), qs.end());
    // Sort by Informatics points
    for (auto& x : qs) {
        if (x[2] == -1)
            fen.upd(x[1], 1);
        else 
            ans[x[2]] += fen.get(x[1]);
    }

    // Undoing changes
    for (auto& x : qs) {
        if (x[2] == -1)
            fen.upd(x[1], -1);
    }
}

void run_case() {
    cin >> n >> q;

    vector <int> val;
    int Q = n + q;
    for (int i = 1; i <= n; ++i) {
        int s, t; 
        cin >> s >> t;
        queries.push_back({s, t, s + t, -1});
        val.push_back(s);
        val.push_back(t);
        val.push_back(s + t);
    }

    for (int i = 1; i <= q; ++i) {
        int x, y, z;
        cin >> x >> y >> z;
        queries.push_back({x, y, z, i});
        val.push_back(x);
        val.push_back(y);
        val.push_back(z);
    }

    for (int& x : val) x = -x;
    sort(val.begin(), val.end());
    val.resize(unique(val.begin(), val.end()) - val.begin());

    int sz = val.size();
    fen.init(N * 4 + 1);
    for (auto& x : queries) {
        for (int i = 0; i < (int) x.size() - 1; ++i) {
            x[i] = lower_bound(val.begin(), val.end(), -x[i]) - val.begin() + 1; 
            // cout << x[i] << "\n";
        }
    }
    // // sort by Maths points
    sort(queries.begin(), queries.end());

    dnc(0, Q - 1);
    for (int i = 1; i <= q; ++i)
        cout << ans[i] << "\n";
}

signed main() {
    cin.tie(0) -> sync_with_stdio(0);
    
    int Test = 1;
    //cin >> Test;
    for (int test = 1; test <= Test; test++){

        run_case();
    }
}

Compilation message

examination.cpp: In function 'void run_case()':
examination.cpp:112:9: warning: unused variable 'sz' [-Wunused-variable]
  112 |     int sz = val.size();
      |         ^~

Subtask #1
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 6492 KB Output is correct
2 Correct 2 ms 6492 KB Output is correct
3 Correct 2 ms 6492 KB Output is correct
4 Correct 2 ms 6492 KB Output is correct
5 Correct 2 ms 6608 KB Output is correct
6 Correct 2 ms 6604 KB Output is correct
7 Correct 13 ms 7452 KB Output is correct
8 Correct 13 ms 7452 KB Output is correct
9 Correct 13 ms 7452 KB Output is correct
10 Correct 12 ms 7452 KB Output is correct
11 Correct 12 ms 7452 KB Output is correct
12 Correct 11 ms 7500 KB Output is correct
13 Correct 12 ms 7452 KB Output is correct
14 Correct 12 ms 7564 KB Output is correct
15 Correct 12 ms 7544 KB Output is correct
16 Correct 10 ms 7512 KB Output is correct
17 Correct 12 ms 7452 KB Output is correct
18 Correct 10 ms 7452 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 536 ms 37328 KB Output is correct
2 Correct 550 ms 35996 KB Output is correct
3 Correct 518 ms 37576 KB Output is correct
4 Correct 516 ms 36172 KB Output is correct
5 Correct 438 ms 35480 KB Output is correct
6 Correct 427 ms 36760 KB Output is correct
7 Correct 510 ms 41724 KB Output is correct
8 Correct 510 ms 36224 KB Output is correct
9 Correct 491 ms 43080 KB Output is correct
10 Correct 399 ms 36992 KB Output is correct
11 Correct 485 ms 36240 KB Output is correct
12 Correct 408 ms 31632 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 536 ms 37328 KB Output is correct
2 Correct 550 ms 35996 KB Output is correct
3 Correct 518 ms 37576 KB Output is correct
4 Correct 516 ms 36172 KB Output is correct
5 Correct 438 ms 35480 KB Output is correct
6 Correct 427 ms 36760 KB Output is correct
7 Correct 510 ms 41724 KB Output is correct
8 Correct 510 ms 36224 KB Output is correct
9 Correct 491 ms 43080 KB Output is correct
10 Correct 399 ms 36992 KB Output is correct
11 Correct 485 ms 36240 KB Output is correct
12 Correct 408 ms 31632 KB Output is correct
13 Correct 586 ms 37780 KB Output is correct
14 Correct 567 ms 37148 KB Output is correct
15 Correct 519 ms 37052 KB Output is correct
16 Correct 542 ms 37692 KB Output is correct
17 Correct 505 ms 34856 KB Output is correct
18 Correct 443 ms 35892 KB Output is correct
19 Correct 560 ms 37452 KB Output is correct
20 Correct 592 ms 37176 KB Output is correct
21 Correct 569 ms 42660 KB Output is correct
22 Correct 437 ms 35120 KB Output is correct
23 Correct 488 ms 35732 KB Output is correct
24 Correct 414 ms 32116 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 6492 KB Output is correct
2 Correct 2 ms 6492 KB Output is correct
3 Correct 2 ms 6492 KB Output is correct
4 Correct 2 ms 6492 KB Output is correct
5 Correct 2 ms 6608 KB Output is correct
6 Correct 2 ms 6604 KB Output is correct
7 Correct 13 ms 7452 KB Output is correct
8 Correct 13 ms 7452 KB Output is correct
9 Correct 13 ms 7452 KB Output is correct
10 Correct 12 ms 7452 KB Output is correct
11 Correct 12 ms 7452 KB Output is correct
12 Correct 11 ms 7500 KB Output is correct
13 Correct 12 ms 7452 KB Output is correct
14 Correct 12 ms 7564 KB Output is correct
15 Correct 12 ms 7544 KB Output is correct
16 Correct 10 ms 7512 KB Output is correct
17 Correct 12 ms 7452 KB Output is correct
18 Correct 10 ms 7452 KB Output is correct
19 Correct 536 ms 37328 KB Output is correct
20 Correct 550 ms 35996 KB Output is correct
21 Correct 518 ms 37576 KB Output is correct
22 Correct 516 ms 36172 KB Output is correct
23 Correct 438 ms 35480 KB Output is correct
24 Correct 427 ms 36760 KB Output is correct
25 Correct 510 ms 41724 KB Output is correct
26 Correct 510 ms 36224 KB Output is correct
27 Correct 491 ms 43080 KB Output is correct
28 Correct 399 ms 36992 KB Output is correct
29 Correct 485 ms 36240 KB Output is correct
30 Correct 408 ms 31632 KB Output is correct
31 Correct 586 ms 37780 KB Output is correct
32 Correct 567 ms 37148 KB Output is correct
33 Correct 519 ms 37052 KB Output is correct
34 Correct 542 ms 37692 KB Output is correct
35 Correct 505 ms 34856 KB Output is correct
36 Correct 443 ms 35892 KB Output is correct
37 Correct 560 ms 37452 KB Output is correct
38 Correct 592 ms 37176 KB Output is correct
39 Correct 569 ms 42660 KB Output is correct
40 Correct 437 ms 35120 KB Output is correct
41 Correct 488 ms 35732 KB Output is correct
42 Correct 414 ms 32116 KB Output is correct
43 Correct 624 ms 39892 KB Output is correct
44 Correct 615 ms 39852 KB Output is correct
45 Correct 636 ms 40348 KB Output is correct
46 Correct 556 ms 39064 KB Output is correct
47 Correct 482 ms 37632 KB Output is correct
48 Correct 430 ms 35792 KB Output is correct
49 Correct 570 ms 45216 KB Output is correct
50 Correct 590 ms 40336 KB Output is correct
51 Correct 570 ms 44984 KB Output is correct
52 Correct 459 ms 38624 KB Output is correct
53 Correct 495 ms 35672 KB Output is correct