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Submission #344181

# Submission time Handle Problem Language Result Execution time Memory
344181 2021-01-05T08:36:01 Z blue Strange Device (APIO19_strange_device) C++11
65 / 100
 1816 ms 18328 KB 
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
 
long long long_gcd(long long a, long long b)
{
    // cout << "gcd " << a << ' ' << b << '\n';
    if(a == b) return a;
    if(a < b) swap(a, b);
    if(b == 0) return a;
    return long_gcd(a%b, b);
}
 
long long long_abs(long long x)
{
    if(x >= 0) return x;
    return -x;
}
 
long long long_sign(long long x)
{
    if(x > 0) return 1;
    return -1;
}
 
int main()
{
    int n;
    long long A, B;
    cin >> n >> A >> B;
 
 
    long long period = A * B / long_gcd(A, B+1);
 
    // cout << period << '\n';
 
    long long l, r;
 
    vector<long long> endpoints;
 
    for(int i = 1; i <= n; i++)
    {
        cin >> l >> r;
 
        if(l % period <= r % period)
        {
            endpoints.push_back(l % period + 1);
            endpoints.push_back(-(r % period) - 1 - 1);
        }
        else
        {
            endpoints.push_back(l % period + 1);
            endpoints.push_back(-period - 1);
 
            endpoints.push_back(0 + 1);
            endpoints.push_back(-(r % period) - 1 - 1);
        }
    }
 
 
        // for(long long e: endpoints) cout << e << ' ';
        // cout << '\n';
 
 
    sort(endpoints.begin(), endpoints.end(), [] (long long p, long long q)
    {
        return long_abs(p) < long_abs(q);
    });
 
    // for(long long e: endpoints) cout << e << ' ';
    // cout << '\n';
 
 
    long long res = 0;
 
    long long count = 0;
    count += long_sign(endpoints[0]);
    for(int i = 1; i < endpoints.size(); i++)
    {
        // cout << count << ' ' << long_abs(endpoints[i]) - long_abs(endpoints[i-1]) << '\n';
        if(count > 0) res += long_abs(endpoints[i]) - long_abs(endpoints[i-1]);
        count += long_sign(endpoints[i]);
    }
 
    cout << res << '\n';
}

Compilation message

strange_device.cpp: In function 'int main()':
strange_device.cpp:79:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   79 |     for(int i = 1; i < endpoints.size(); i++)
      |                    ~~^~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 17 ms 1004 KB Output is correct
3 Correct 17 ms 1004 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 16 ms 1004 KB Output is correct
17 Correct 180 ms 5088 KB Output is correct
18 Correct 1 ms 364 KB Output is correct

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Incorrect 1 ms 364 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 2 ms 364 KB Output is correct
3 Correct 2 ms 364 KB Output is correct
4 Correct 2 ms 364 KB Output is correct
5 Correct 1107 ms 17432 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1634 ms 17900 KB Output is correct
3 Correct 1692 ms 17812 KB Output is correct
4 Correct 1622 ms 17804 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1634 ms 17900 KB Output is correct
3 Correct 1692 ms 17812 KB Output is correct
4 Correct 1622 ms 17804 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1658 ms 17864 KB Output is correct
7 Correct 1644 ms 17888 KB Output is correct
8 Correct 1646 ms 17864 KB Output is correct
9 Correct 1774 ms 18048 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1634 ms 17900 KB Output is correct
3 Correct 1692 ms 17812 KB Output is correct
4 Correct 1622 ms 17804 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 162 ms 5088 KB Output is correct
7 Correct 166 ms 5088 KB Output is correct
8 Correct 158 ms 5088 KB Output is correct
9 Correct 164 ms 5088 KB Output is correct
10 Correct 155 ms 5088 KB Output is correct
11 Correct 164 ms 5088 KB Output is correct
12 Correct 161 ms 5088 KB Output is correct
13 Correct 173 ms 5108 KB Output is correct
14 Correct 159 ms 5088 KB Output is correct
15 Correct 175 ms 5088 KB Output is correct
16 Correct 175 ms 5088 KB Output is correct
17 Correct 166 ms 5088 KB Output is correct
18 Correct 1652 ms 17992 KB Output is correct
19 Correct 1624 ms 18032 KB Output is correct
20 Correct 1808 ms 17860 KB Output is correct
21 Correct 177 ms 5216 KB Output is correct
22 Correct 154 ms 5088 KB Output is correct
23 Correct 503 ms 11108 KB Output is correct

Subtask #7
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 170 ms 5092 KB Output is correct
3 Correct 172 ms 5088 KB Output is correct
4 Correct 1816 ms 18144 KB Output is correct
5 Correct 171 ms 5088 KB Output is correct
6 Correct 174 ms 5088 KB Output is correct
7 Correct 172 ms 5088 KB Output is correct
8 Correct 176 ms 5088 KB Output is correct
9 Correct 167 ms 5088 KB Output is correct
10 Correct 177 ms 5088 KB Output is correct
11 Correct 175 ms 5088 KB Output is correct
12 Correct 161 ms 5236 KB Output is correct
13 Correct 176 ms 5088 KB Output is correct
14 Correct 1790 ms 18328 KB Output is correct
15 Correct 181 ms 5088 KB Output is correct
16 Correct 1602 ms 18020 KB Output is correct
17 Correct 1632 ms 18244 KB Output is correct
18 Correct 1 ms 492 KB Output is correct

Subtask #8
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 17 ms 1004 KB Output is correct
3 Correct 17 ms 1004 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 16 ms 1004 KB Output is correct
17 Correct 180 ms 5088 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 0 ms 364 KB Output is correct
20 Incorrect 1 ms 364 KB Output isn't correct
21 Halted 0 ms 0 KB -