import { readFileSync } from "fs";

////////////////////////////////////////////////////////////////////////////////
// Application
////////////////////////////////////////////////////////////////////////////////
// const P = 10 ** 9 + 7;
// const P = 10n ** 9n + 7n;
// eslint-disable-next-line @typescript-eslint/no-unused-vars
// const [addP, subP, prodP, powP] = getModCalc(P);

const getAns = (ss: number[], ds: number[]): number => {
  const sMax = max(ss);
  const sMin = min(ss);
  const dMax = max(ds);
  const dMin = min(ds);

  return max([sMax - sMin, dMax - dMin]);
};

/** main */
const main = () => {
  // eslint-disable-next-line @typescript-eslint/no-unused-vars
  const [cin, nCin, bCin] = getCin();

  const N = nCin();
  const ss: number[] = [];
  const ds: number[] = [];
  range(N).forEach(() => {
    const [x, y] = [nCin(), nCin()];
    ss.push(x + y);
    ds.push(x - y);
  });

  const ans = getAns(ss, ds);
  console.log(ans);
};
main();

////////////////////////////////////////////////////////////////////////////////
// Library
////////////////////////////////////////////////////////////////////////////////
// eslint-disable-next-line @typescript-eslint/no-unused-vars
function range(n: number | bigint) {
  return Array.from(Array(Number(n)), (_, i) => i);
}

function tuple<T extends unknown[]>(...ts: T) {
  return ts;
}

function getCin() {
  const inputs = readFileSync("/dev/stdin", "utf-8")
    .split("\n")
    .flatMap((l) => l.split(" "));
  let count = 0;
  const cin = () => inputs[count++];
  return tuple(
    cin,
    () => Number(cin()),
    () => BigInt(cin())
  );
}

function isNumber(x: unknown): x is number {
  return typeof x === "number";
}

function isBigint(x: unknown): x is bigint {
  return typeof x === "bigint";
}

type NumberOrBigintOrElse<T> = number | bigint extends T
  ? undefined
  : T extends number
  ? number
  : T extends bigint
  ? bigint
  : undefined;

// eslint-disable-next-line @typescript-eslint/no-unused-vars
function max<T extends number | bigint>(ts: T[]) {
  return (ts.length === 0
    ? undefined
    : isNumber(ts[0])
    ? (ts as number[]).reduce((acc, t) => Math.max(acc, t))
    : (ts as bigint[]).reduce((acc, t) =>
        acc >= t ? acc : t
      )) as NumberOrBigintOrElse<T>;
}

// eslint-disable-next-line @typescript-eslint/no-unused-vars
function min<T extends number | bigint>(ts: T[]) {
  return (ts.length === 0
    ? undefined
    : isNumber(ts[0])
    ? (ts as number[]).reduce((acc, t) => Math.min(acc, t))
    : (ts as bigint[]).reduce((acc, t) =>
        acc <= t ? acc : t
      )) as NumberOrBigintOrElse<T>;
}

// eslint-disable-next-line @typescript-eslint/no-unused-vars
function abs<T extends number | bigint>(t: T) {
  return (isNumber(t)
    ? Math.abs(t)
    : isBigint(t)
    ? t >= 0n
      ? t
      : -t
    : undefined) as NumberOrBigintOrElse<T>;
}

type BinaryOperation<T> = (x: T, y: T) => T;

// eslint-disable-next-line @typescript-eslint/no-unused-vars
function getModCalc<T extends number | bigint>(n: T) {
  type CalcType = BinaryOperation<NumberOrBigintOrElse<T>>;
  const modAdd = ((x, y) =>
    isNumber(x) && isNumber(y) && isNumber(n)
      ? ((((x % n) + (y % n)) % n) + n) % n
      : isBigint(x) && isBigint(y) && isBigint(n)
      ? ((((x % n) + (y % n)) % n) + n) % n
      : undefined) as CalcType;
  const modSub = ((x, y) =>
    isNumber(x) && isNumber(y) && isNumber(n)
      ? ((((x % n) - (y % n)) % n) + n) % n
      : isBigint(x) && isBigint(y) && isBigint(n)
      ? ((((x % n) - (y % n)) % n) + n) % n
      : undefined) as CalcType;
  const modProd = ((x, y) =>
    isNumber(x) && isNumber(y) && isNumber(n)
      ? ((((x % n) * (y % n)) % n) + n) % n
      : isBigint(x) && isBigint(y) && isBigint(n)
      ? ((((x % n) * (y % n)) % n) + n) % n
      : undefined) as CalcType;
  const modPow: CalcType = (x, n) => {
    const isEvens =
      isNumber(x) && isNumber(n)
        ? ((x: number, n: number) => {
            let tmpN = n;
            const isEvens: boolean[] = [];
            while (tmpN !== 1) {
              isEvens.push(tmpN % 2 === 0);
              tmpN = Math.floor(tmpN / 2);
            }
            return isEvens;
          })(x, n)
        : isBigint(x) && isBigint(n)
        ? ((x: bigint, n: bigint) => {
            let tmpN = n;
            const isEvens: boolean[] = [];
            while (tmpN !== 1n) {
              isEvens.push(tmpN % 2n === 0n);
              tmpN /= 2n;
            }
            return isEvens;
          })(x, n)
        : undefined;
    return (typeof isEvens !== "undefined"
      ? isEvens.reduceRight((acc, b) => {
          const tmp = modProd(acc, acc);
          return b ? tmp : modProd(x, tmp);
        }, x)
      : undefined) as NumberOrBigintOrElse<T>;
  };
  return tuple(modAdd, modSub, modProd, modPow);
}


Measured memory_bytes: 117512