Baekjoon #21312

#include<bits/stdc++.h>

using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    int cnt[2] = {0, 0};
    for(int i = 0; i < 3; ++i) {
        int x; cin >> x;
        if(cnt[x % 2] == 0) cnt[x % 2] = x;
        else cnt[x % 2] *= x;
    }
    if(cnt[1] != 0) cout << cnt[1];
    else cout << cnt[0];

    return 0;
}

import sys

def input():
    return sys.stdin.readline().rstrip()

odd_num = -1
even_num = -1
for number in map(int, input().split()):
    if number % 2:
        if odd_num == -1:
            odd_num = number
        else:
            odd_num *= number
    else:
        if even_num == -1:
            even_num = number
        else:
            even_num *= number
if odd_num != -1:
    print(odd_num)
else:
    print(even_num)