import java
.math
.BigDecimal
;
import java
.math
.BigInteger
;
import java
.util
.*
;
public class Main{
public static void main(String
[] args
) {
BigInteger a
= BigInteger
.ONE
;
BigInteger b
= BigInteger
.ONE
;
for(int i
= 0;i
< 500;i
++) {
BigInteger t
= b
;
b
= a
.add(b
);
a
= t
;
}
BigDecimal div
= new BigDecimal(a
,110).divide(new BigDecimal(b
,110),BigDecimal
.ROUND_HALF_DOWN
);
System
.out
.println(div
.toPlainString().substring(0,103));
}
}
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