import java.io.FileNotFoundException; // check violation of constraints import java.io.IOException; import java.io.InputStream; import java.util.Arrays; import java.util.NoSuchElementException; public class Main { void run() { FastScanner sc = new FastScanner(); double r = sc.nextDouble(); double R = sc.nextDouble(); { String[] s1 = String.valueOf(r).split("\\."); String[] s2 = String.valueOf(R).split("\\."); if ((s1.length >= 2 && s1[1].length() > 7)||(s2.length >= 2 && s2[1].length() > 7)) { throw new AssertionError(); } } if (!(0 < r && r + 0.01 < R && R <= 100)) { throw new AssertionError(); } double outer = R + r; double inner = R - r; double ang = Math.atan2(r, Math.sqrt(R * R - r * r)); double ans = Math.PI * (outer * outer - inner * inner) * ((Math.PI - ang) / Math.PI) + Math.PI * r * r; System.out.println(2 * Math.PI - 2 * ang); System.out.println(ans); } public static void main(String[] args) throws FileNotFoundException { new Main().run(); } void tr(Object... objects) { System.out.println(Arrays.deepToString(objects)); } } class FastScanner { private final InputStream in = System.in; private final byte[] buffer = new byte[1024]; private int ptr = 0; private int buflen = 0; private boolean hasNextByte() { if (ptr < buflen) { return true; } else { ptr = 0; try { buflen = in.read(buffer); } catch (IOException e) { e.printStackTrace(); } if (buflen <= 0) { return false; } } return true; } private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1; } private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126; } public boolean hasNext() { while (hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; return hasNextByte(); } public String next() { if (!hasNext()) throw new NoSuchElementException(); StringBuilder sb = new StringBuilder(); int b = readByte(); while (isPrintableChar(b)) { sb.appendCodePoint(b); b = readByte(); } return sb.toString(); } public long nextLong() { if (!hasNext()) throw new NoSuchElementException(); long n = 0; boolean minus = false; int b = readByte(); if (b == '-') { minus = true; b = readByte(); } if (b < '0' || '9' < b) { throw new NumberFormatException(); } while (true) { if ('0' <= b && b <= '9') { n *= 10; n += b - '0'; } else if (b == -1 || !isPrintableChar(b)) { return minus ? -n : n; } else { throw new NumberFormatException(); } b = readByte(); } } public int nextInt() { long nl = nextLong(); if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException(); return (int) nl; } public double nextDouble() { return Double.parseDouble(next()); } }