BetweenTwoSets.cpp

#include <bits/stdc++.h>

using namespace std;

vector<string> split_string(string);

/*
 * Complete the getTotalX function below.
 */
int getLCD(vector<int> a) {

    int maxA = *max_element(a.begin(), a.end());
    int x = 2, lcd = 1;
    
    while(x <= maxA) {

        vector<int> indices;
        for(int i = 0; i < a.size(); ++i) {
            if(a[i] % x == 0) {
                indices.push_back(i);
                //a[i] /= x;
            }
        }
        if(indices.size() >= 2) {
            for(int i = 0; i < indices.size(); ++i) {
                a[indices[i]] /= x;
            }
            lcd *= x;
        }
        else    ++x;
    }

    for(int i = 0; i < a.size(); ++i) {
        lcd *= a[i];
    }

    return lcd;
}

int binGCD(int a, int b) {
    if(b == 0)  return a;
    return binGCD(b, a%b);
}

int getGCD(vector<int> a) {
    
    int gcd = a[0];
    for(int i = 1; i < a.size(); ++i) {
        gcd = binGCD(a[i], gcd);
    }
    return gcd;
}

int getTotalX(vector<int> a, vector<int> b) { 
    
    int lcd = getLCD(a);
    int gcd = getGCD(b);
    cout<<lcd<<" "<<gcd<<endl;
    int count = 0, prod = lcd;
    while(prod <= gcd) {
        if(gcd % prod == 0) {
            ++count;
        }
        prod += lcd;
    }
    return count;
 }

int main()
{
    ofstream fout(getenv("OUTPUT_PATH"));

    string nm_temp;
    getline(cin, nm_temp);

    vector<string> nm = split_string(nm_temp);

    int n = stoi(nm[0]);

    int m = stoi(nm[1]);

    string a_temp_temp;
    getline(cin, a_temp_temp);

    vector<string> a_temp = split_string(a_temp_temp);

    vector<int> a(n);

    for (int a_itr = 0; a_itr < n; a_itr++) {
        int a_item = stoi(a_temp[a_itr]);

        a[a_itr] = a_item;
    }

    string b_temp_temp;
    getline(cin, b_temp_temp);

    vector<string> b_temp = split_string(b_temp_temp);

    vector<int> b(m);

    for (int b_itr = 0; b_itr < m; b_itr++) {
        int b_item = stoi(b_temp[b_itr]);

        b[b_itr] = b_item;
    }

    int total = getTotalX(a, b);

    fout << total << "\n";

    fout.close();

    return 0;
}

vector<string> split_string(string input_string) {
    string::iterator new_end = unique(input_string.begin(), input_string.end(), [] (const char &x, const char &y) {
        return x == y and x == ' ';
    });

    input_string.erase(new_end, input_string.end());

    while (input_string[input_string.length() - 1] == ' ') {
        input_string.pop_back();
    }

    vector<string> splits;
    char delimiter = ' ';

    size_t i = 0;
    size_t pos = input_string.find(delimiter);

    while (pos != string::npos) {
        splits.push_back(input_string.substr(i, pos - i));

        i = pos + 1;
        pos = input_string.find(delimiter, i);
    }

    splits.push_back(input_string.substr(i, min(pos, input_string.length()) - i + 1));

    return splits;
}