Apartments

input/code.cpp: In function 'int main()':
input/code.cpp:11:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |     for (int i = 0; i < applicants.size(); i++)
      |                     ~~^~~~~~~~~~~~~~~~~~~
input/code.cpp:15:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |     for (int i = 0; i < apartments.size(); i++)
      |                     ~~^~~~~~~~~~~~~~~~~~~
input/code.cpp:25:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |     while (applicantIndex < applicants.size() && apartmentIndex < apartments.size())
      |            ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~
input/code.cpp:25:65: warning: comparison of integer expressions of different si...

// Online C++ compiler to run C++ program online
#include <iostream>
#include <vector>
#include <algorithm>

int main() {
    int n, m, k; // Applicants, apartments, treshold
    std::cin >> n >> m >> k;
    
    std::vector<int> applicants = std::vector<int>(n);
    for (int i = 0; i < applicants.size(); i++)
        std::cin >> applicants[i];
    
    std::vector<int> apartments = std::vector<int>(m);
    for (int i = 0; i < apartments.size(); i++)
        std::cin >> apartments[i];
    
    std::sort(applicants.begin(), applicants.end());
    std::sort(apartments.begin(), apartments.end());
    
    int reserved = 0;
    
    int applicantIndex = 0;
    int apartmentIndex = 0;
    while (applicantIndex < applicants.size() && apartmentIndex < apartments.size())
    {
        if (std::abs(applicants[applicantIndex] - apartments[apartmentIndex]) <= k)
        {
            applicantIndex++;
            apartmentIndex++;
            reserved++;
        }
        else
        {
            if (applicants[applicantIndex] < apartments[apartmentIndex])
                applicantIndex++;
            else
                apartmentIndex++;
        }
    }

    std::cout << reserved;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED

Test 16

Verdict: ACCEPTED

Test 17

Verdict: ACCEPTED

Test 18

Verdict: ACCEPTED

Test 19

Verdict: ACCEPTED