Files
codeforces/java/50A.java
T
2023-03-02 20:58:03 +07:00

16 lines
309 B
Java

package com.company;
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
// write your code here
Scanner sc = new Scanner(System.in);
int m = sc.nextInt();
int n = sc.nextInt();
int out = m*n/2;
System.out.print(out);
}
}