#include <iostream>
#include <cstdio>

using namespace std;

int main(void) {
    long long n; cin >> n;
    
    if(n % 2 == 1) {
        printf("%lld %lld\n", (n+1)/2, (n-1)/2);
    }
    else if(n % 4 == 0) {
        printf("%lld %lld\n", n/4 + 1, n/4 - 1);
    }
    else {
        printf("impossible\n");
    }
    return 0;
}