#include "bits/stdc++.h"
using namespace std;
//#include "testlib.h"
#define ff first
#define ss second
#define all(v) v.begin(),v.end()
#define int long long
#define ll long long
#define M 1000000007
#define MM 998244353
#define inputarr(a,n) for(int i=0;i<n;++i) cin>>a[i]
#define GCD(m,n) __gcd(m,n)
#define LCM(m,n) m*(n/GCD(m,n))
#define mii  map<ll ,ll >
#define msi  map<string,ll >
#define rep(a,b)    for(ll i=a;i<b;i++)
#define rep0(n)    for(ll i=0;i<n;i++)
#define repi(i,a,b) for(ll i=a;i<b;i++)
#define pb push_back
#define vi vector<ll>
#define vs vector<string>
#define ppb pop_back
#define endl '\n'
#define asdf ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define r0 return 0;
#define FORD(i, a, b) for (int i = (int) (a); i >= (int) (b); --i)
#define inputoutput freopen("input.txt", "r", stdin);freopen("output.txt", "w", stdout);
#define Set(a, s) (a, s, sizeof (a))
#define FOR repi
#define vii vector<pii>
#define pii pair<int,int>
#define REVERSE(v) reverse(all(v))
#define trav(a, x) for(auto& a : x)
#define display(x) trav(a,x) cout<<a<<" ";cout<<endl
#define debug cerr<<"bhau"<<endl
#define trace(...) __f(#__VA_ARGS__, __VA_ARGS__)
template <typename Arg1>
void __f(const char* name, Arg1&& arg1){
    std::cerr << name << " : " << arg1 << endl;
}
template <typename Arg1, typename... Args>
void __f(const char* names, Arg1&& arg1, Args&&... args){
    const char* comma = strchr(names + 1, ',');std::cerr.write(names, comma - names) << " : " << arg1<<" | ";__f(comma+1, args...);
}
template<typename T, typename U> static inline void amin(T &x, U y) 
{ 
    if (y < x) 
        x = y; 
}
template<typename T, typename U> static inline void amax(T &x, U y) 
{ 
    if (x < y) 
        x = y; 
}
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

struct custom_hash {
    static uint64_t splitmix64(uint64_t x) {
        // http://xorshift.di.unimi.it/splitmix64.c
        x += 0x9e3779b97f4a7c15;
        x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
        x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
        return x ^ (x >> 31);
    }

    size_t operator()(uint64_t x) const {
        static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
        return splitmix64(x + FIXED_RANDOM);
    }
};



ll max(ll a, ll b) { return (a > b)? a : b;}
int min(int a, int b) { return (a < b)? a : b;} 


int solve(){

    int n, k;
    cin >> n >> k;
    int ans = 0;
    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= k; j++){
            ans += i * 100 + j;
        }
    }
    cout << ans;


    return 0;
}
signed main(){
    asdf
    // freopen("inputf.in", "w", stdout);
    
    int t=1;
    // cin>>t;
    while(t--){
        solve();
    }
    return 0;
}

#pragma GCC optimize("Ofast")
#if 1
#define _USE_MATH_DEFINES
#include "bits/stdc++.h"

using namespace std;

using ll = int64_t;
using db = double;
using ld = long double;
using vi = vector<int>;
using vl = vector<ll>;
using vvi = vector<vector<int>>;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using vpii = vector<pii>;
using vpll = vector<pll>;

constexpr char newl = '\n';
constexpr double eps = 1e-10;

#define FOR(i,a,b) for (int i = (a); i < (b); i++)
#define F0R(i,b) FOR(i,0,b)
#define RFO(i,a,b) for (int i = ((b)-1); i >=(a); i--)
#define RF0(i,b) RFO(i,0,b)
#define show(x) cerr << #x << " = " << (x) << '\n';
#define rng(a) a.begin(),a.end()
#define rrng(a) a.rbegin(),a.rend()
#define sz(x) (int)(x).size()
#define YesNo(x) cout<<((x)?"Yes":"No")<<newl;
#define YESNO(x) cout<<((x)?"YES":"NO")<<newl;
#define v(T) vector<T>
#define vv(T) vector<vector<T>>

template<class A, class B> using umap = unordered_map<A, B>;
template<class A> using uset = unordered_set<A>;

template<typename T1, typename T2> inline void chmin(T1& a, T2 b) { if (a > b) a = b; }
template<typename T1, typename T2> inline void chmax(T1& a, T2 b) { if (a < b) a = b; }
template<class T> bool lcmp(const pair<T, T>& l, const pair<T, T>& r) {
  return l.first < r.first;
}
template<class T> istream& operator>>(istream& i, v(T)& v) {
  F0R(j, sz(v)) i >> v[j];
  return i;
}
template<class A, class B> istream& operator>>(istream& i, pair<A, B>& p) {
  return i >> p.first >> p.second;
}
template<class A, class B, class C> istream& operator>>(istream& i, tuple<A, B, C>& t) {
  return i >> get<0>(t) >> get<1>(t) >> get<2>(t);
}
template<class T> ostream& operator<<(ostream& o, const pair<T, T>& v) {
  o << "(" << v.first << "," << v.second << ")";
  return o;
}
template<class T> ostream& operator<<(ostream& o, const vector<T>& v) {
  F0R(i, v.size()) {
    o << v[i] << ' ';
  }
  o << newl;
  return o;
}
template<class T> ostream& operator<<(ostream& o, const set<T>& v) {
  for (auto e : v) {
    o << e << ' ';
  }
  o << newl;
  return o;
}
template<class T1, class T2> ostream& operator<<(ostream& o, const map<T1, T2>& m) {
  for (auto& p : m) {
    o << p.first << ": " << p.second << newl;
  }
  o << newl;
  return o;
}


struct P {
  int x, y;
  int dist(const P& v) {
    return max(abs(v.x - x), abs(v.y - y));
  }
};

// INSERT ABOVE HERE
signed main() {
  cin.tie(0);
  ios_base::sync_with_stdio(false);

  int N; cin >> N;
  v(P) as(N);
  vpii xs(N), ys(N);
  F0R(i, N) {
    cin >> as[i].x>>as[i].y;
    xs[i] = { as[i].x,i };
    ys[i] = { as[i].y,i };
  }
  sort(rng(xs));
  sort(rng(ys));
  uset<int> vs;
  auto F = [&](int i) {
    vs.insert(xs[i].second);
    vs.insert(ys[i].second);
  };
  F(0); F(1); F(N - 2); F(N - 1);
  vi bs;
  for (auto v : vs) {
    bs.push_back(v);
  }
  vi rs;
  F0R(i, sz(bs)) {
    FOR(j, i + 1, sz(bs)) {
      rs.push_back(as[bs[i]].dist(as[bs[j]]));
    }
  }
  sort(rrng(rs));
  cout << rs[1];
}
#endif
