import java.io.BufferedReader; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStreamReader; import java.util.ArrayList; import java.util.Comparator; import java.util.List; import java.util.TreeSet; public class Main { // public static int w; // public static int k; // public static int n; // public static int[][] dp; // public static int[] r; // public static long[] buy; // public static List list = new ArrayList(); // public static NodeW[] product; public static void main(String[] args) throws NumberFormatException, IOException{ ContestScanner in = new ContestScanner(); int n = in.nextInt(); long res = 0; long under = 0; String line0; for(int i=0; i= 10000000000L){ res += under / 10000000000L; under %= 10000000000L; }if(under > 0) System.out.println(res+"."+under); else if(under == 0) System.out.println(res+"."+"0000000000"); else{ under = 10000000000L-under; res -= 10000000000L; System.out.println(res+"."+under); } } } //class MyComp implements Comparator{ // public int compare(int[] a, int[] b) { // return Main.product[a[0]].dist - Main.product[b[0]].dist; // } //} class Reverse implements Comparator{ public int compare(Integer arg0, Integer arg1) { return arg1 - arg0; } } class NodeW{ int id; // int dist; List edge = new ArrayList(); List costList = new ArrayList(); public NodeW(int id) { this.id = id; } public void createEdge(NodeW node, int cost) { edge.add(node); costList.add(cost); // node.setDist(dist+1); } // public void setDist(int dist){ // this.dist = Math.max(this.dist, dist); // for(NodeW node: edge){ // node.setDist(dist+1); // } // } } class Range> implements Comparable>{ T start; T end; public Range(T start, T end){ this.start = start; this.end = end; } public boolean inRange(T val){ if(start.compareTo(val) <= 0 && end.compareTo(val) >= 0){ return true; } return false; } public boolean isCommon(Range range){ if(inRange(range.start) || inRange(range.end) || range.inRange(start)){ return true; } return false; } public Range connect(Range range){ if(!isCommon(range)) return null; Range res = new Range(start.compareTo(range.start) <= 0 ? start : range.start, end.compareTo(range.end) >= 0 ? end : range.end); return res; } public boolean connectToThis(Range range){ if(!isCommon(range)) return false; start = start.compareTo(range.start) <= 0 ? start : range.start; end = end.compareTo(range.end) >= 0 ? end : range.end; return true; } @Override public int compareTo(Range range) { int res = start.compareTo(range.start); if(res == 0) return end.compareTo(range.end); return res; } public String toString(){ return "["+start+","+end+"]"; } } class RangeSet>{ TreeSet> ranges = new TreeSet>(); public void add(Range range){ Range con = ranges.floor(range); if(con != null){ if(con.connectToThis(range)) range = con; } con = ranges.ceiling(range); while(con != null && range.connectToThis(con)){ ranges.remove(con); con = ranges.ceiling(range); } ranges.add(range); } public String toString(){ StringBuilder bld = new StringBuilder(); for(Range r: ranges){ bld.append(r+"\n"); } return bld.toString(); } } class Node{ int id; List edge = new ArrayList(); public Node(int id){ this.id = id; } public void createEdge(Node node){ edge.add(node); } } class MyMath{ public static long fact(long n){ long res = 1; while(n > 0){ res *= n--; } return res; } public static long[][] pascalT(int n){ long[][] tri = new long[n][]; for(int i=0; i