????????????д???acm?г????????????????????java ??????????????????java??BigInteger ???easy??
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import java.math.*;
import java.util.*;
public class Bignum {
public static void main(String[] args) {
BigInteger bigNumOne;
BigInteger bigNumTwo;
Scanner in = new Scanner(System.in);
while(in.hasNextBigInteger()) {
bigNumOne  = in.nextBigInteger();
bigNumTwo  = in.nextBigInteger();
bigNumOne =  bigNumOne.add(bigNumTwo);
System.out.println(bigNumOne);
}
}
}
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