Submission #631758

#	Time	Username	Problem	Language	Result	Execution time	Memory
631758		Stavab	Arranging Shoes (IOI19_shoes)	C++14	50 / 100	1088 ms	3112 KiB

shoes

#include <vector>

using namespace std;

long long count_swaps(vector<int> S)
{
    long long sum = 0;
    int temp;
    
    for(int i = 0; i < S.size() - 1; i += 2)
    {
        temp = 0;
        for(int j = i + 1; j < S.size(); j++)
        {
            if(temp)
                swap(temp, S[j]);
            else
                temp = S[j];
                
            if(temp == -S[i])
            {
                if(temp < 0)
                    sum += j - i;
                else
                    sum += j - i - 1;
                    
                break;
            }
        }
    }
    
    return sum;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:10:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |     for(int i = 0; i < S.size() - 1; i += 2)
      |                    ~~^~~~~~~~~~~~~~
shoes.cpp:13:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |         for(int j = i + 1; j < S.size(); j++)
      |                            ~~^~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 15
• Subtask 5: 20 / 20
• Subtask 6: 0 / 15