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Submission #748393

# Submission time Handle Problem Language Result Execution time Memory
748393 2023-05-26T08:20:19 Z Sharky Strange Device (APIO19_strange_device) C++17
100 / 100
 655 ms 84848 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long

int co[2000010], d[2000010];

void update(int l, int r) {
    // cout << "updating: " << l << " " << r << "\n";
    d[l]++;
    d[r]--;
}

int32_t main() {
    ios::sync_with_stdio(0); cin.tie(0);
    int n, A, B, ans = 0;
    cin >> n >> A >> B;
    map<int, bool> mp;
    int g = gcd(A, B + 1);
    int mul = (A + g - 1) / g;
    if (3E18 / mul < B) mul = 3E18;
    else mul = (A / g) * B;
    // cout << mul << endl;
    vector<pair<int, int>> ends;
    vector<int> sorted;
    for (int i = 0; i < n; i++) {
        int l, r;
        cin >> l >> r;
        if (r - l + 1 >= mul) {
            cout << mul << endl;
            return 0;
        }
        l %= mul, r %= mul;
        // cout << l << ' ' << r << '\n';
        ends.emplace_back(l, r + 1);
        sorted.push_back(l);
        sorted.push_back(r + 1);
    }
    sorted.push_back(0);
    sorted.push_back(mul);
    sort(sorted.begin(), sorted.end());
    sorted.erase(unique(sorted.begin(), sorted.end()), sorted.end());
    for (int i = 0; i < sorted.size(); i++) co[i+1] = sorted[i];
    int mx = 0;
    for (int i = 0; i < ends.size(); i++) {
        ends[i].first = lower_bound(sorted.begin(), sorted.end(), ends[i].first) - sorted.begin() + 1;
        ends[i].second = lower_bound(sorted.begin(), sorted.end(), ends[i].second) - sorted.begin() + 1;
        if (ends[i].first > ends[i].second) {
            update(ends[i].first, sorted.size());
            update(1, ends[i].second);
        } else update(ends[i].first, ends[i].second);
    }
    for (int i = 1; i <= sorted.size(); i++) d[i] += d[i-1];
    for (int i = 1; i < sorted.size(); i++) {
        // cout << co[i] << ' ' << co[i+1] << ' ' << d[i] << '\n';
        if (d[i] > 0) ans += co[i+1] - co[i];
    }
    cout << ans << '\n';
    return 0;
}

Compilation message

strange_device.cpp: In function 'int32_t main()':
strange_device.cpp:43:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |     for (int i = 0; i < sorted.size(); i++) co[i+1] = sorted[i];
      |                     ~~^~~~~~~~~~~~~~~
strange_device.cpp:45:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |     for (int i = 0; i < ends.size(); i++) {
      |                     ~~^~~~~~~~~~~~~
strange_device.cpp:53:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |     for (int i = 1; i <= sorted.size(); i++) d[i] += d[i-1];
      |                     ~~^~~~~~~~~~~~~~~~
strange_device.cpp:54:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |     for (int i = 1; i < sorted.size(); i++) {
      |                     ~~^~~~~~~~~~~~~~~
strange_device.cpp:44:9: warning: unused variable 'mx' [-Wunused-variable]
   44 |     int mx = 0;
      |         ^~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 6 ms 1364 KB Output is correct
3 Correct 7 ms 1360 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 328 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 6 ms 1360 KB Output is correct
17 Correct 66 ms 8376 KB Output is correct
18 Correct 1 ms 212 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 0 ms 328 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 332 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 328 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 325 ms 57076 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 555 ms 47816 KB Output is correct
3 Correct 597 ms 84776 KB Output is correct
4 Correct 555 ms 84740 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 555 ms 47816 KB Output is correct
3 Correct 597 ms 84776 KB Output is correct
4 Correct 555 ms 84740 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 545 ms 84620 KB Output is correct
7 Correct 559 ms 84764 KB Output is correct
8 Correct 568 ms 84756 KB Output is correct
9 Correct 630 ms 84728 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 555 ms 47816 KB Output is correct
3 Correct 597 ms 84776 KB Output is correct
4 Correct 555 ms 84740 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 55 ms 8860 KB Output is correct
7 Correct 60 ms 8932 KB Output is correct
8 Correct 50 ms 8936 KB Output is correct
9 Correct 56 ms 8896 KB Output is correct
10 Correct 56 ms 8924 KB Output is correct
11 Correct 57 ms 8896 KB Output is correct
12 Correct 56 ms 8872 KB Output is correct
13 Correct 59 ms 8956 KB Output is correct
14 Correct 58 ms 8932 KB Output is correct
15 Correct 64 ms 8860 KB Output is correct
16 Correct 62 ms 8912 KB Output is correct
17 Correct 52 ms 8856 KB Output is correct
18 Correct 565 ms 84708 KB Output is correct
19 Correct 568 ms 84672 KB Output is correct
20 Correct 643 ms 84780 KB Output is correct
21 Correct 67 ms 8880 KB Output is correct
22 Correct 54 ms 8968 KB Output is correct
23 Correct 139 ms 23820 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 66 ms 7084 KB Output is correct
3 Correct 60 ms 8904 KB Output is correct
4 Correct 655 ms 84848 KB Output is correct
5 Correct 62 ms 8936 KB Output is correct
6 Correct 61 ms 8928 KB Output is correct
7 Correct 64 ms 9128 KB Output is correct
8 Correct 68 ms 8856 KB Output is correct
9 Correct 61 ms 8948 KB Output is correct
10 Correct 69 ms 8964 KB Output is correct
11 Correct 60 ms 8880 KB Output is correct
12 Correct 53 ms 9008 KB Output is correct
13 Correct 62 ms 8948 KB Output is correct
14 Correct 637 ms 84712 KB Output is correct
15 Correct 65 ms 8868 KB Output is correct
16 Correct 561 ms 84628 KB Output is correct
17 Correct 563 ms 84684 KB Output is correct
18 Correct 1 ms 212 KB Output is correct

Subtask #8
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 6 ms 1364 KB Output is correct
3 Correct 7 ms 1360 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 336 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 328 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 6 ms 1360 KB Output is correct
17 Correct 66 ms 8376 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 0 ms 328 KB Output is correct
22 Correct 1 ms 212 KB Output is correct
23 Correct 0 ms 332 KB Output is correct
24 Correct 1 ms 328 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 325 ms 57076 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 555 ms 47816 KB Output is correct
31 Correct 597 ms 84776 KB Output is correct
32 Correct 555 ms 84740 KB Output is correct
33 Correct 1 ms 212 KB Output is correct
34 Correct 545 ms 84620 KB Output is correct
35 Correct 559 ms 84764 KB Output is correct
36 Correct 568 ms 84756 KB Output is correct
37 Correct 630 ms 84728 KB Output is correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 55 ms 8860 KB Output is correct
40 Correct 60 ms 8932 KB Output is correct
41 Correct 50 ms 8936 KB Output is correct
42 Correct 56 ms 8896 KB Output is correct
43 Correct 56 ms 8924 KB Output is correct
44 Correct 57 ms 8896 KB Output is correct
45 Correct 56 ms 8872 KB Output is correct
46 Correct 59 ms 8956 KB Output is correct
47 Correct 58 ms 8932 KB Output is correct
48 Correct 64 ms 8860 KB Output is correct
49 Correct 62 ms 8912 KB Output is correct
50 Correct 52 ms 8856 KB Output is correct
51 Correct 565 ms 84708 KB Output is correct
52 Correct 568 ms 84672 KB Output is correct
53 Correct 643 ms 84780 KB Output is correct
54 Correct 67 ms 8880 KB Output is correct
55 Correct 54 ms 8968 KB Output is correct
56 Correct 139 ms 23820 KB Output is correct
57 Correct 0 ms 212 KB Output is correct
58 Correct 66 ms 7084 KB Output is correct
59 Correct 60 ms 8904 KB Output is correct
60 Correct 655 ms 84848 KB Output is correct
61 Correct 62 ms 8936 KB Output is correct
62 Correct 61 ms 8928 KB Output is correct
63 Correct 64 ms 9128 KB Output is correct
64 Correct 68 ms 8856 KB Output is correct
65 Correct 61 ms 8948 KB Output is correct
66 Correct 69 ms 8964 KB Output is correct
67 Correct 60 ms 8880 KB Output is correct
68 Correct 53 ms 9008 KB Output is correct
69 Correct 62 ms 8948 KB Output is correct
70 Correct 637 ms 84712 KB Output is correct
71 Correct 65 ms 8868 KB Output is correct
72 Correct 561 ms 84628 KB Output is correct
73 Correct 563 ms 84684 KB Output is correct
74 Correct 1 ms 212 KB Output is correct
75 Correct 1 ms 332 KB Output is correct
76 Correct 1 ms 212 KB Output is correct
77 Correct 1 ms 340 KB Output is correct
78 Correct 1 ms 212 KB Output is correct
79 Correct 6 ms 1396 KB Output is correct
80 Correct 650 ms 84748 KB Output is correct
81 Correct 651 ms 84788 KB Output is correct
82 Correct 639 ms 84708 KB Output is correct
83 Correct 617 ms 84700 KB Output is correct
84 Correct 627 ms 84704 KB Output is correct
85 Correct 627 ms 84816 KB Output is correct
86 Correct 131 ms 23736 KB Output is correct
87 Correct 1 ms 340 KB Output is correct