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PairsDivisiblebyFive.java

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import java.util.ArrayList;

import java.util.Scanner;

public class PairsDivisiblebyFive {

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

int M = scanner.nextInt();

int N = scanner.nextInt();

ArrayList<Integer> list1 = new ArrayList<>();

ArrayList<Integer> list2 = new ArrayList<>();

for (int i = 1; i <= M; i++) {

list1.add(i);

}

for (int i = 1; i <= N; i++) {

list2.add(i);

}

int count = 0;

for (int num1 : list1) {

for (int j = 0; j < list2.size(); j++) {

int num2 = list2.get(j);

if ((num1 + num2) % 5 == 0) {

count++;

list2.remove(j);

break;

}

}

}

System.out.println(count);

}

}