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Submission #1105486

# Submission time Handle Problem Language Result Execution time Memory
1105486 2024-10-26T13:58:37 Z borisAngelov Strange Device (APIO19_strange_device) C++17
100 / 100
 964 ms 19024 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
const long long MAXMOD = 1e18 + 7;
 
int n;
long long a, b;
 
void fastIO()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
}
 
int main()
{
    fastIO();
 
    cin >> n >> a >> b;
 
    long long MOD = a / __gcd(a, b + 1);
    bool hasPeriod = true;
 
    if (MAXMOD / MOD < b)
    {
        hasPeriod = false;
    }
    else
    {
        MOD *= b; // a * b / gcd(a, b + 1)
    }
 
    vector<pair<long long, long long>> intervals;
    long long ans = 0;
    bool all = false;
 
    for (int i = 1; i <= n; ++i)
    {
        long long l, r;
        cin >> l >> r;
 
        if (hasPeriod == false)
        {
            ans += (r - l + 1);
        }
        else
        {
            long long newL = l % MOD;
            long long newR = r % MOD;
 
            if (l / MOD == r / MOD)
            {
                intervals.push_back({newL, newR});
            }
            else if (l / MOD + 1 == r / MOD)
            {
                intervals.push_back({newL, MOD - 1});
                intervals.push_back({0, newR});
            }
            else
            {
                all = true;
                ans = MOD;
            }
        }
    }
 
    if (hasPeriod == false)
    {
        cout << ans << endl;
        return 0;
    }
 
    if (all == true)
    {
        cout << ans << endl;
        return 0;
    }
 
    sort(intervals.begin(), intervals.end());
 
    long long from = intervals[0].first, to = intervals[0].second;
 
    for (int i = 1; i < intervals.size() - 1; ++i)
    {
        if (intervals[i].first <= to)
        {
            to = max(to, intervals[i].second);
        }
        else
        {
            ans += (to - from + 1);
            from = intervals[i].first;
            to = intervals[i].second;
        }
    }
 
    if (intervals.back().first <= to)
    {
        to = intervals.back().second;
        ans += (to - from + 1);
    }
    else
    {
        ans += (to - from + 1);
        from = intervals.back().first;
        to = intervals.back().second;
        ans += (to - from + 1);
    }
 
    cout << ans << endl;
 
    return 0;
}

Compilation message

strange_device.cpp: In function 'int main()':
strange_device.cpp:86:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   86 |     for (int i = 1; i < intervals.size() - 1; ++i)
      |                     ~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 4 ms 724 KB Output is correct
3 Correct 3 ms 724 KB Output is correct
4 Correct 1 ms 504 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 2 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 4 ms 732 KB Output is correct
17 Correct 29 ms 3560 KB Output is correct
18 Correct 1 ms 340 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 504 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 336 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 504 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 166 ms 18864 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 242 ms 19024 KB Output is correct
3 Correct 249 ms 18868 KB Output is correct
4 Correct 245 ms 18864 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 242 ms 19024 KB Output is correct
3 Correct 249 ms 18868 KB Output is correct
4 Correct 245 ms 18864 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 244 ms 19016 KB Output is correct
7 Correct 244 ms 19024 KB Output is correct
8 Correct 291 ms 19008 KB Output is correct
9 Correct 265 ms 19008 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 242 ms 19024 KB Output is correct
3 Correct 249 ms 18868 KB Output is correct
4 Correct 245 ms 18864 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 24 ms 3560 KB Output is correct
7 Correct 27 ms 3532 KB Output is correct
8 Correct 28 ms 3532 KB Output is correct
9 Correct 29 ms 3532 KB Output is correct
10 Correct 34 ms 3532 KB Output is correct
11 Correct 29 ms 3532 KB Output is correct
12 Correct 27 ms 3532 KB Output is correct
13 Correct 30 ms 3532 KB Output is correct
14 Correct 27 ms 3532 KB Output is correct
15 Correct 31 ms 3532 KB Output is correct
16 Correct 29 ms 3532 KB Output is correct
17 Correct 28 ms 3532 KB Output is correct
18 Correct 272 ms 18864 KB Output is correct
19 Correct 274 ms 18868 KB Output is correct
20 Correct 283 ms 19012 KB Output is correct
21 Correct 33 ms 3532 KB Output is correct
22 Correct 26 ms 3532 KB Output is correct
23 Correct 72 ms 10684 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 30 ms 3532 KB Output is correct
3 Correct 32 ms 3532 KB Output is correct
4 Correct 309 ms 18864 KB Output is correct
5 Correct 28 ms 3532 KB Output is correct
6 Correct 30 ms 3532 KB Output is correct
7 Correct 34 ms 3532 KB Output is correct
8 Correct 31 ms 3532 KB Output is correct
9 Correct 30 ms 3548 KB Output is correct
10 Correct 30 ms 3532 KB Output is correct
11 Correct 31 ms 3532 KB Output is correct
12 Correct 29 ms 3532 KB Output is correct
13 Correct 29 ms 3532 KB Output is correct
14 Correct 282 ms 19016 KB Output is correct
15 Correct 30 ms 3532 KB Output is correct
16 Correct 262 ms 18864 KB Output is correct
17 Correct 287 ms 18864 KB Output is correct
18 Correct 1 ms 336 KB Output is correct

Subtask #8
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 4 ms 724 KB Output is correct
3 Correct 3 ms 724 KB Output is correct
4 Correct 1 ms 504 KB Output is correct
5 Correct 1 ms 336 KB Output is correct
6 Correct 1 ms 336 KB Output is correct
7 Correct 2 ms 336 KB Output is correct
8 Correct 1 ms 336 KB Output is correct
9 Correct 1 ms 336 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 336 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 4 ms 732 KB Output is correct
17 Correct 29 ms 3560 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 336 KB Output is correct
21 Correct 1 ms 504 KB Output is correct
22 Correct 1 ms 336 KB Output is correct
23 Correct 1 ms 336 KB Output is correct
24 Correct 1 ms 336 KB Output is correct
25 Correct 1 ms 504 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 336 KB Output is correct
28 Correct 166 ms 18864 KB Output is correct
29 Correct 1 ms 336 KB Output is correct
30 Correct 242 ms 19024 KB Output is correct
31 Correct 249 ms 18868 KB Output is correct
32 Correct 245 ms 18864 KB Output is correct
33 Correct 1 ms 336 KB Output is correct
34 Correct 244 ms 19016 KB Output is correct
35 Correct 244 ms 19024 KB Output is correct
36 Correct 291 ms 19008 KB Output is correct
37 Correct 265 ms 19008 KB Output is correct
38 Correct 1 ms 340 KB Output is correct
39 Correct 24 ms 3560 KB Output is correct
40 Correct 27 ms 3532 KB Output is correct
41 Correct 28 ms 3532 KB Output is correct
42 Correct 29 ms 3532 KB Output is correct
43 Correct 34 ms 3532 KB Output is correct
44 Correct 29 ms 3532 KB Output is correct
45 Correct 27 ms 3532 KB Output is correct
46 Correct 30 ms 3532 KB Output is correct
47 Correct 27 ms 3532 KB Output is correct
48 Correct 31 ms 3532 KB Output is correct
49 Correct 29 ms 3532 KB Output is correct
50 Correct 28 ms 3532 KB Output is correct
51 Correct 272 ms 18864 KB Output is correct
52 Correct 274 ms 18868 KB Output is correct
53 Correct 283 ms 19012 KB Output is correct
54 Correct 33 ms 3532 KB Output is correct
55 Correct 26 ms 3532 KB Output is correct
56 Correct 72 ms 10684 KB Output is correct
57 Correct 1 ms 336 KB Output is correct
58 Correct 30 ms 3532 KB Output is correct
59 Correct 32 ms 3532 KB Output is correct
60 Correct 309 ms 18864 KB Output is correct
61 Correct 28 ms 3532 KB Output is correct
62 Correct 30 ms 3532 KB Output is correct
63 Correct 34 ms 3532 KB Output is correct
64 Correct 31 ms 3532 KB Output is correct
65 Correct 30 ms 3548 KB Output is correct
66 Correct 30 ms 3532 KB Output is correct
67 Correct 31 ms 3532 KB Output is correct
68 Correct 29 ms 3532 KB Output is correct
69 Correct 29 ms 3532 KB Output is correct
70 Correct 282 ms 19016 KB Output is correct
71 Correct 30 ms 3532 KB Output is correct
72 Correct 262 ms 18864 KB Output is correct
73 Correct 287 ms 18864 KB Output is correct
74 Correct 1 ms 336 KB Output is correct
75 Correct 1 ms 336 KB Output is correct
76 Correct 1 ms 504 KB Output is correct
77 Correct 1 ms 336 KB Output is correct
78 Correct 1 ms 336 KB Output is correct
79 Correct 3 ms 732 KB Output is correct
80 Correct 282 ms 18872 KB Output is correct
81 Correct 270 ms 18872 KB Output is correct
82 Correct 261 ms 18880 KB Output is correct
83 Correct 964 ms 19012 KB Output is correct
84 Correct 265 ms 18864 KB Output is correct
85 Correct 261 ms 18864 KB Output is correct
86 Correct 93 ms 10680 KB Output is correct
87 Correct 1 ms 336 KB Output is correct