import java.io.IOException; import java.util.InputMismatchException; public class Main { int[][][] dp; int dp(int a, int b, int s) { if (b == 0) { return 1 << 25; } if (0 < dp[a][b][s]) { return dp[a][b][s]; } if (s == 1) { if (a == 0) { return 2; } else { return a; } } if (Math.abs(a - s) <= Math.abs(b - s)) { return Math.abs(a - s) + s; } else { int min = 1 << 25; min = Math.min(min, dp(a, 1, 1) + Math.abs(s - 1)); min = Math.min(min, dp(a, a, a) + Math.abs(a - s)); return Math.abs(b - s) + min; } } void run() { MyScanner sc = new MyScanner(); int a = sc.nextInt(); int b = sc.nextInt(); int s = sc.nextInt(); dp = new int[101][101][101]; System.out.println(dp(a, b, s)); } public static void main(String[] args) { new Main().run(); } public void mapDebug(int[][] a) { System.out.println("--------map display---------"); for (int i = 0; i < a.length; i++) { for (int j = 0; j < a[i].length; j++) { System.out.printf("%3d ", a[i][j]); } System.out.println(); } System.out.println("----------------------------" + '\n'); } class MyScanner { int read() { try { return System.in.read(); } catch (IOException e) { throw new InputMismatchException(); } } boolean isSpaceChar(int c) { return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1; } boolean isEndline(int c) { return c == '\n' || c == '\r' || c == -1; } int nextInt() { return Integer.parseInt(next()); } int[] nextIntArray(int n) { int[] array = new int[n]; for (int i = 0; i < n; i++) array[i] = nextInt(); return array; } long nextLong() { return Long.parseLong(next()); } long[] nextLongArray(int n) { long[] array = new long[n]; for (int i = 0; i < n; i++) array[i] = nextLong(); return array; } double nextDouble() { return Double.parseDouble(next()); } double[] nextDoubleArray(int n) { double[] array = new double[n]; for (int i = 0; i < n; i++) array[i] = nextDouble(); return array; } String next() { int c = read(); while (isSpaceChar(c)) c = read(); StringBuilder res = new StringBuilder(); do { res.appendCodePoint(c); c = read(); } while (!isSpaceChar(c)); return res.toString(); } String[] nextStringArray(int n) { String[] array = new String[n]; for (int i = 0; i < n; i++) array[i] = next(); return array; } String nextLine() { int c = read(); while (isEndline(c)) c = read(); StringBuilder res = new StringBuilder(); do { res.appendCodePoint(c); c = read(); } while (!isEndline(c)); return res.toString(); } } }