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Submission #1105468

# Submission time Handle Problem Language Result Execution time Memory
1105468 2024-10-26T13:14:42 Z borisAngelov Strange Device (APIO19_strange_device) C++17
5 / 100
 310 ms 35240 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;

    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 (newL < newR && l / MOD == r / MOD)
            {
                intervals.push_back({newL, newR});
            }
            else
            {
                intervals.push_back({newL, MOD - 1});
                intervals.push_back({0, newR});
            }
        }
    }

    if (hasPeriod == false)
    {
        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:74:23: 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]
   74 |     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 4 ms 724 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 336 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 Incorrect 310 ms 35240 KB Output isn't correct
3 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 Incorrect 310 ms 35240 KB Output isn't correct
3 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 Incorrect 310 ms 35240 KB Output isn't correct
3 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 28 ms 3500 KB Output is correct
3 Correct 28 ms 3532 KB Output is correct
4 Correct 291 ms 19008 KB Output is correct
5 Correct 27 ms 3532 KB Output is correct
6 Correct 27 ms 3532 KB Output is correct
7 Correct 27 ms 3532 KB Output is correct
8 Correct 28 ms 3704 KB Output is correct
9 Correct 27 ms 3532 KB Output is correct
10 Correct 29 ms 3532 KB Output is correct
11 Correct 28 ms 3620 KB Output is correct
12 Correct 24 ms 3544 KB Output is correct
13 Correct 28 ms 3548 KB Output is correct
14 Incorrect 262 ms 19016 KB Output isn't correct
15 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 4 ms 724 KB Output isn't correct
3 Halted 0 ms 0 KB -