import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.NoSuchElementException;
import java.util.Scanner;

public class Main {
	class Int {
		long[] mag;
		int sig = 0;
		// 2進数
		// long long_mask = -1L;
		// long int_mask = long_mask >>> 32;
		// long radix = int_mask + 1;

		// 10進数
		long radix = (long) 1e9;

		// long radix = -1;
		int intLen = 0;

		// public Int(int v) {
		// intLen = v == 0 ? 0 : 1;
		// mag = new long[] { (long) Math.abs(v) };
		// sig = (int) Math.signum(v);
		// }
		//

		// radix == 10で取得を想定
		public Int(String s) {
			if (s.length() == 1 && s.charAt(0) == 0) {
				sig = 0;
				intLen = 0;
				mag = new long[] { 0 };
				return;
			}
			if (s.indexOf(0) == '-')
				sig = -1;
			else
				sig = 1;
			int pos = 0;
			mag = new long[s.length() / 9 + 1];
			for (int i = s.length() - 1; i >= (s.indexOf(0) == '-' ? 1 : 0); i -= 9) {
				long v = 0;
				for (int j = Math.max(i - 8, 0); j <= i; ++j) {
					v *= 10;
					v += s.charAt(j) - '0';
				}
				mag[pos] = v;
				++pos;
				++intLen;
			}
		}

		public Int(long v) {
			if (v == 0) {
				intLen = 0;
				sig = 0;
				mag = new long[] { 0 };
				return;
			}
			sig = (int) Math.signum(v);
			v = (long) (Math.abs(v));
			// intLen = (v >= (1L << 32)) ? 2 : 1;
			intLen = (v >= radix) ? 2 : 1;
			// mag = new long[] { int_mask & v, v >>> 32, };
			mag = new long[] { v % radix, v / radix };
		}

		void add(Int a) {
			if (a.sig == 0) {
				return;
			}
			if (sig * a.sig >= 0) {
				unsignedAdd(a);
				if (sig == 0) {
					sig = a.sig;
				}
			} else {
				Int u = a.copy();
				u.sig *= -1;
				sub(u);
			}
		}

		void sub(Int a) {
			if (a.sig == 0)
				return;
			if (sig != a.sig) {
				unsignedAdd(a);
				if (sig == 0) {
					sig = (-1) * a.sig;
				}
			} else {
				if (sig * compare(a) > 0) {
					unsignedSub(a);
				} else {
					Int t = a.copy();
					t.unsignedSub(this);
					sig *= -t.sig;
					mag = t.mag;
					intLen = t.intLen;
				}
			}
		}

		void unsignedAdd(Int a) {
			long res = 0;
			if (mag.length < a.mag.length) {
				mag = Arrays.copyOf(mag, a.mag.length);
			}
			intLen = Math.max(intLen, a.intLen);
			for (int i = 0; i < a.intLen; ++i) {
				long v = mag[i] + a.mag[i] + res;
				// mag[i] = int_mask & v;
				mag[i] = v % radix;
				// res = v >>> 32;
				res = v / radix;
			}
			for (int i = a.intLen; res != 0; ++i) {
				if (i >= mag.length) {
					mag = Arrays.copyOf(mag, 1 + mag.length);
				}
				long v = mag[i] + res;
				// mag[i] = int_mask & v;
				mag[i] = v % radix;
				// res = v >>> 32;
				res = v / radix;
				intLen = Math.max(intLen, i + 1);
			}
		}

		void unsignedSub(Int a) {
			if (sig == 0) {
				mag = Arrays.copyOf(a.mag, a.mag.length);
				sig = -1 * a.sig;
			}
			long res = 0;
			for (int i = 0; i < a.intLen; ++i) {
				long t = mag[i] - a.mag[i] - res;
				if (t < 0) {
					res = 1;
					t += radix;
				} else {
					res = 0;
				}
				mag[i] = t;
			}
			for (int i = a.intLen; res != 0; ++i) {
				long t = mag[i] - res;
				if (t < 0) {
					res = 1;
					t += radix;
				} else {
					res = 0;
				}
				mag[i] = t;
			}
			boolean f = false;
			for (int i = intLen - 1; i >= 0; --i) {
				if (mag[i] != 0) {
					intLen = i + 1;
					f = true;
					break;
				}
			}
			if (!f) {
				sig = 0;
				intLen = 0;
			}
		}

		int compare(Int a) {
			if (sig != a.sig) {
				return Integer.compare(sig, a.sig);
			}
			if (intLen != a.intLen) {
				return sig * Integer.compare(intLen, a.intLen);
			}
			for (int i = intLen - 1; i >= 0; --i) {
				if (mag[i] == a.mag[i])
					continue;
				return sig * Long.compare(mag[i], a.mag[i]);
			}
			return 0;
		}

		void singleMul(Int a) {
			if (intLen > 1 || a.intLen > 1) {
				throw new AssertionError();
			}
			if (a.sig == 0) {
				intLen = 0;
				sig = 0;
				mag = new long[] { 0 };
				return;
			}
			long prd = mag[0] * a.mag[0];
			// mag[0] = int_mask & prd;
			mag[0] = prd % radix;
			// long res = prd >>> 32;
			long res = prd / radix;
			if (res > 0) {
				++intLen;
				mag = Arrays.copyOf(mag, 2);
				mag[1] = res;
			}
			sig *= a.sig;
		}

		// n^1.58
		// ( a* r+ b )( c*r + d )
		// = ( a + b )( c + d )r-( ac + bd )r + acr^2 + db
		// = XYr - ( Z + W )r + Zr^2 + W;
		void karatsuba(Int o) {
			int len_ = Math.max(intLen, o.intLen);
			if (len_ <= 1) {
				singleMul(o);
				return;
			}
			int Len = 1;
			while (Len < len_) {
				Len *= 2;
			}
			Int ret = new Int(0);
			Int a = copy(Len / 2, Len);
			Int b = copy(0, Len / 2);
			Int c = o.copy(Len / 2, Len);
			Int d = o.copy(0, Len / 2);
			Int X = a.copy();
			X.add(b);
			Int Y = c.copy();
			Y.add(d);
			X.karatsuba(Y);
			X.shift(Len / 2);
			ret.add(X);
			Int Z = a.copy();
			Z.karatsuba(c);
			Int W = b.copy();
			W.karatsuba(d);
			ret.add(W);
			Int tmp = Z.copy();
			tmp.shift(Len);
			ret.add(tmp);
			Z.add(W);
			Z.shift(Len / 2);
			ret.sub(Z);
			this.sig = ret.sig;
			this.mag = Arrays.copyOf(ret.mag, ret.mag.length);
			this.intLen = ret.intLen;
		}

		// Newton method
		// n^1.58
		void div(Int b) {
			Int a = copy();
			if (b.sig == 0)
				throw new ArithmeticException();
			int nextsig = sig * b.sig;
			sig = (int) (Math.abs(sig));
			b.sig = (int) (Math.abs(b.sig));
			if (compare(b) < 0) {
				sig = 0;
				mag = new long[] { 0 };
				intLen = 0;
				return;
			}
			Int M = new Int(1);
			Int X = new Int(1);
			M.shift(intLen + 1);
			Int pre = X.copy();
			while (true) {
				Int tmp = X.copy();
				tmp.karatsuba(X);
				tmp.karatsuba(b);
				tmp.shift(-M.intLen);
				X.add(X);
				X.sub(tmp);
				if (X.compare(pre) == 0) {
					break;
				}
				pre = X.copy();
			}
			X.karatsuba(this);
			X.shift(-M.intLen);
			{
				Int d = X.copy();
				d.karatsuba(b);
				if (a.compare(d) < 0) {
					X.sub(new Int(1));
				}
			}
			mag = X.mag;
			sig = nextsig;
			intLen = X.intLen;
		}

		void shift(int k) {
			if (sig == 0)
				return;
			if (intLen + k <= 0) {
				mag = new long[] { 0 };
				sig = 0;
				intLen = 0;
				return;
			}
			Int u = copy();
			mag = new long[intLen + k];
			if (k >= 0)
				System.arraycopy(u.mag, 0, mag, k, intLen);
			else
				System.arraycopy(u.mag, -k, mag, 0, intLen + k);
			intLen += k;
		}

		Int copy(int l, int r) {
			Int a = copy();
			a.mag = new long[r - l];
			r = Math.min(r, a.intLen);
			if (l >= r) {
				return new Int(0);
			}
			System.arraycopy(mag, l, a.mag, 0, r - l);
			a.intLen = r - l;
			return a;
		}

		Int copy() {
			Int ret = new Int(0);
			ret.sig = sig;
			ret.mag = Arrays.copyOf(mag, mag.length);
			ret.intLen = intLen;
			return ret;

		}

		void check() {
			// v=0->sig==0を満たすか？
			boolean f = true;
			for (int i = 0; i < mag.length; ++i) {
				f &= mag[i] == 0;
			}
			if (f && sig != 0) {
				throw new AssertionError();
			}
			if (sig == 0)
				return;
			// intLenは正しいか？
			f = mag[intLen - 1] > 0;
			for (int i = mag.length - 1; i > intLen - 1; --i) {
				f &= mag[i] == 0;
			}
			if (!f) {
				throw new AssertionError();

			}
		}

		void mod(Int mod) {
			Int tmp = copy();
			tmp.div(mod);
			tmp.karatsuba(mod);
			sub(mod);
		}

		ArrayList<Int> rs = new ArrayList<>();
		// rsサイズの変更には対応していない。

		String toString(int radix) {
			if (sig == 0)
				return "0";
			rs.clear();
			Int r = new Int(radix);
			Int b = r.copy();
			int cnt = 0;
			rs.add(b.copy());
			while (true) {
				++cnt;
				b.karatsuba(b);
				rs.add(b.copy());
				Int tmp = b.copy();
				tmp.karatsuba(b);
				if (tmp.compare(this) >= 0) {
					break;
				}
			}
			String str = toString(radix, cnt);
			while (str.charAt(0) == '0') {
				str = str.substring(1, str.length());
			}
			if (sig == -1)
				str = "-" + str;
			return str;
		}

		long popCount(long MODULO) {
			if (sig == 0)
				return 0;
			rs.clear();
			Int r = new Int(2);
			Int b = r.copy();
			int cnt = 0;
			rs.add(b.copy());
			while (true) {
				++cnt;
				b.karatsuba(b);
				rs.add(b.copy());
				Int tmp = b.copy();
				tmp.karatsuba(b);
				if (tmp.compare(this) >= 0) {
					break;
				}
			}
			return popCount(MODULO, cnt);
		}

		// radix==10を想定
		long popCount(long MODULO, int cnt) {
			if (intLen <= 2) {
				return Long.bitCount(mag[0] + mag[1] * radix);
			}
			Int b = rs.get(cnt);
			Int u = copy();
			u.div(b);
			Int l = copy();
			u.rs = rs;
			long us = u.popCount(MODULO, cnt - 1);
			u.karatsuba(b);
			l.sub(u);
			l.rs = rs;
			long ls = l.popCount(MODULO, cnt - 1);
			long ret = us + ls;
			if (ret >= MODULO)
				ret -= MODULO;
			return ret;
		}

		String toString(int radix, int cnt) {
			if (intLen <= 1) {
				if (radix == 10) {
					String ret = String.valueOf(mag[0]);
					while (ret.length() < 1 << (cnt + 1)) {
						ret = "0" + ret;
					}
					return ret;
				} else if (radix == 2) {
					return Long.toBinaryString(mag[0]);
				} else {
					throw new AssertionError();
				}
			}
			Int b = rs.get(cnt);
			Int u = copy();
			u.div(b);
			Int l = copy();
			u.rs = rs;
			String us = u.toString(radix, cnt - 1);
			while (us.length() < 1 << cnt) {
				us = "0" + us;
			}
			u.karatsuba(b);
			l.sub(u);
			l.rs = rs;
			String ls = l.toString(radix, cnt - 1);
			while (ls.length() < 1 << cnt) {
				ls = "0" + ls;
			}
			return us + ls;
		}

		long toLong() {
			if (sig == 0) {
				return 0;
			}
			if (intLen == 1) {
				return sig * mag[0];
			}
			if (intLen == 2) {
				return sig * (mag[0] + (mag[1] << 32));
			}
			throw new AssertionError();
		}

	}

	public void run() {
		Scanner sc = new Scanner();
		Int v = new Int(sc.next());
		tr();
		long MODULO = 1004535809L;
		System.out.println(v.popCount(MODULO));
	}

	public static void main(String[] args) throws FileNotFoundException {
		new Main().run();
	}

	static void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}

	class Scanner {
		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 boolean isPrintableChar(int c) {
			return 33 <= c && c <= 126;
		}

		private void skipUnprintable() {
			while (hasNextByte() && !isPrintableChar(buffer[ptr]))
				ptr++;
		}

		public boolean hasNext() {
			skipUnprintable();
			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();
			}
		}
	}
}