Submission #344509

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
344509	2021-01-06T03:52:20 Z	blue	Strange Device (APIO19_strange_device)	C++11	Compilation error	0 ms	0 KB

strange_device

#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;

    int maxSize = 0;

    for(int i = 1; i <= n; i++)
    {
        cin >> l >> r;
        maxSize = max(maxSize, r-l+1);

        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);
        }
    }

    if(maxSize >= period)
    {
        cout << period << '\n';
        return 0;
    }


        // 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:47:37: error: no matching function for call to 'max(int&, long long int)'
   47 |         maxSize = max(maxSize, r-l+1);
      |                                     ^
In file included from /usr/include/c++/9/bits/char_traits.h:39,
                 from /usr/include/c++/9/ios:40,
                 from /usr/include/c++/9/ostream:38,
                 from /usr/include/c++/9/iostream:39,
                 from strange_device.cpp:1:
/usr/include/c++/9/bits/stl_algobase.h:222:5: note: candidate: 'template<class _Tp> const _Tp& std::max(const _Tp&, const _Tp&)'
  222 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/9/bits/stl_algobase.h:222:5: note:   template argument deduction/substitution failed:
strange_device.cpp:47:37: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   47 |         maxSize = max(maxSize, r-l+1);
      |                                     ^
In file included from /usr/include/c++/9/bits/char_traits.h:39,
                 from /usr/include/c++/9/ios:40,
                 from /usr/include/c++/9/ostream:38,
                 from /usr/include/c++/9/iostream:39,
                 from strange_device.cpp:1:
/usr/include/c++/9/bits/stl_algobase.h:268:5: note: candidate: 'template<class _Tp, class _Compare> const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  268 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/9/bits/stl_algobase.h:268:5: note:   template argument deduction/substitution failed:
strange_device.cpp:47:37: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   47 |         maxSize = max(maxSize, r-l+1);
      |                                     ^
In file included from /usr/include/c++/9/algorithm:62,
                 from strange_device.cpp:3:
/usr/include/c++/9/bits/stl_algo.h:3456:5: note: candidate: 'template<class _Tp> _Tp std::max(std::initializer_list<_Tp>)'
 3456 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/9/bits/stl_algo.h:3456:5: note:   template argument deduction/substitution failed:
strange_device.cpp:47:37: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   47 |         maxSize = max(maxSize, r-l+1);
      |                                     ^
In file included from /usr/include/c++/9/algorithm:62,
                 from strange_device.cpp:3:
/usr/include/c++/9/bits/stl_algo.h:3462:5: note: candidate: 'template<class _Tp, class _Compare> _Tp std::max(std::initializer_list<_Tp>, _Compare)'
 3462 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/9/bits/stl_algo.h:3462:5: note:   template argument deduction/substitution failed:
strange_device.cpp:47:37: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   47 |         maxSize = max(maxSize, r-l+1);
      |                                     ^
strange_device.cpp:88:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   88 |     for(int i = 1; i < endpoints.size(); i++)
      |                    ~~^~~~~~~~~~~~~~~~~~