RiskAnalyzer.java
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	package crypto.elgamal;
	import java.math.BigInteger;

	public class RiskAnalyzer {

	public static final int PRECISION = 100;
	public static final BigInteger PRECISION_BIG_INTEGER = BigInteger.valueOf(PRECISION);

	public static FragmentEncrypted risk(FragmentEncrypted[] SNPs, BigInteger[] coefficients) {

	if (SNPs.length != coefficients.length) {
	throw new ArrayIndexOutOfBoundsException("dimension of fragments and coefficients do not match");
	}

	FragmentEncrypted result = new FragmentEncrypted();
	for (int i = 0; i < SNPs.length; i++) {
	result = result.add(SNPs[i].scale(PRECISION_BIG_INTEGER.multiply(coefficients[i])));
	}

	return result;
	}

	}