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#include <cstdio>
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int main()
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{
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long long n;
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scanf("%I64d", &n);
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n == 1 || n == 2 ? printf("-1") : n & 1 ? printf("%I64d %I64d", (n * n - 1) / 2, (n * n + 1) / 2) : printf("%I64d %I64d", (n / 2) * (n / 2) + 1, (n / 2) * (n / 2) - 1);
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return 0;
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}
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