oj.uz

Submission #1105471

# Submission time Handle Problem Language Result Execution time Memory
1105471 2024-10-26T13:18:06 Z borisAngelov Strange Device (APIO19_strange_device) C++17
5 / 100
 332 ms 51276 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
            {
                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(); ++i)
    {
        if (intervals[i].first <= to)
        {
            to = intervals[i].second;
        }
        else
        {
            ans += (to - from + 1);
            from = intervals[i].first;
            to = intervals[i].second;
        }
    }

    ans += (to - from + 1);
    cout << ans << endl;

    return 0;
}

Compilation message

strange_device.cpp: In function 'int main()':
strange_device.cpp:81:23: 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]
   81 |     for (int i = 1; i < intervals.size(); ++i)
      |                     ~~^~~~~~~~~~~~~~~~~~

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Incorrect 3 ms 848 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 336 KB Output is correct
4 Correct 1 ms 564 KB Output is correct
5 Correct 1 ms 336 KB Output is correct

Subtask #3
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Incorrect 1 ms 336 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 332 ms 33308 KB Output is correct
3 Incorrect 259 ms 51276 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 332 ms 33308 KB Output is correct
3 Incorrect 259 ms 51276 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 332 ms 33308 KB Output is correct
3 Incorrect 259 ms 51276 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Correct 38 ms 5324 KB Output is correct
3 Correct 33 ms 6348 KB Output is correct
4 Correct 326 ms 49576 KB Output is correct
5 Correct 33 ms 5580 KB Output is correct
6 Correct 31 ms 3532 KB Output is correct
7 Correct 34 ms 5580 KB Output is correct
8 Correct 33 ms 6336 KB Output is correct
9 Correct 28 ms 3532 KB Output is correct
10 Correct 29 ms 3532 KB Output is correct
11 Correct 32 ms 5580 KB Output is correct
12 Incorrect 21 ms 3548 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #8
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 336 KB Output is correct
2 Incorrect 3 ms 848 KB Output isn't correct
3 Halted 0 ms 0 KB -