#include<bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef vector<ll> vll;
typedef vector<vector<ll>> vvll;
typedef vector<vector<vector<ll>>> vvvll;
typedef vector<bool> vb;
typedef vector<vector<bool>> vvb;
typedef vector<vector<vector<bool>>> vvvb;
typedef pair<ll, ll> pll;
typedef vector<pll> vpll;
typedef vector<vpll> vvpll;
typedef vector<double> vd;
typedef vector<vd> vdd;

#define FOR(i,x,y) for(ll i=(ll)x; i<(ll)y; ++i)
#define REP(i,y) FOR(i, 0, y)
#define RFOR(i,x,y) for(ll i=(ll)x; i>=(ll)y; --i)
#define RREP(i,x) RFOR(i, x, 0)
#define ALL(a) a.begin(), a.end()
#define pb push_back
#define debug_print(x...) cerr << "line " << __LINE__ << " : "; debug_print_in(x);

template <typename First>
void debug_print_in(First first){
  cerr << first << endl;
  return;
}

template <typename First, typename... Rest>
void debug_print_in(First first, Rest... rest){
  cerr << first << " ";
  debug_print_in(rest...);
  return;
}

void IN(void){
  return;
}

template <typename First, typename... Rest>
void IN(First& first, Rest&... rest){
  cin >> first;
  IN(rest...);
  return;
}

template <typename First>
void OUT(First first){
  cout << first << endl;
  return;
}

template <typename First, typename... Rest>
void OUT(First first, Rest... rest){
  cout << first << " ";
  OUT(rest...);
  return;
}

template<class t, class u> t chmax(t&a,u b){if(a<b)a=b; return a;};
template<class t, class u> t chmin(t&a,u b){if(a>b)a=b; return a;};
int popcount(int t){return __builtin_popcount(t);} //GCC
int popcount(ll t){return __builtin_popcountll(t);} //GCC

template <typename T>
void vec_print(vector<T> VEC){
  REP(i, VEC.size()){
    cerr << VEC[i] << " ";
  }
  cerr << endl;
};

template <typename T>
void mat_print(vector<vector<T> > MAT){
  REP(i,MAT.size()){
    REP(j,MAT[i].size()){
      cerr << MAT[i][j] << " ";
    }
    cerr << endl;
  }
};

constexpr int INF = (1<<30);
constexpr ll INFLL = 1LL<<62;
constexpr long double EPS = 1e-12;
constexpr ll MOD = (ll)((1E+9)+7);

int main(){
  cin.tie(0); // cut the cin and cout (default, std::flush is performed after std::cin)
  ios::sync_with_stdio(false); // cut the iostream and stdio (DON'T endl; BUT "\n";)

  ll N;
  IN(N);
  vll xl(3, INF), xr(3, -INF), yd(3, INF), yu(3, -INF);
  REP(i,N){
    ll x, y;
    char c;
    IN(x,y,c);
    switch(c){
      case 'R':
        chmin(xl[1], x);
        chmax(xr[0], x);
        chmin(yd[2], y);
        chmax(yu[2], y);
        break;
      case 'L':
        chmin(xl[0], x);
        chmax(xr[1], x);
        chmin(yd[2], y);
        chmax(yu[2], y);
        break;
      case 'U':
        chmin(xl[2], x);
        chmax(xr[2], x);
        chmin(yd[1], y);
        chmax(yu[0], y);
        break;
      case 'D':
        chmin(xl[2], x);
        chmax(xr[2], x);
        chmin(yd[0], y);
        chmax(yu[1], y);
        break;
    }
  }

  vector<double> time(1, 0);

  time.pb((double)(xl[2]-xl[1]));
  time.pb((double)(xl[0]-xl[2]));
  time.pb((double)(xl[0]-xl[1])/2.0);

  time.pb((double)(xr[1]-xr[2]));
  time.pb((double)(xr[2]-xr[0]));
  time.pb((double)(xr[1]-xr[0])/2.0);

  time.pb((double)(yd[2]-yd[1]));
  time.pb((double)(yd[0]-yd[2]));
  time.pb((double)(yd[0]-yd[1])/2.0);

  time.pb((double)(yu[1]-yu[2]));
  time.pb((double)(yu[2]-yu[0]));
  time.pb((double)(yu[1]-yu[0])/2.0);

  double S = -1.0;

  REP(i,time.size()){
    if(time[i]<0.0) continue;
    double T = time[i];
    double XL = min({xl[0]-T, xl[1]+T, (double)xl[2]});
    double XR = max({xr[0]+T, xr[1]-T, (double)xr[2]});
    double YD = min({yd[0]-T, yd[1]+T, (double)yd[2]});
    double YU = max({yu[0]+T, yu[1]-T, (double)yu[2]});

    debug_print(T, XL, XR, YD, YU);

    if(S<0.0) S = (XR-XL)*(YU-YD);
    chmin(S, (XR-XL)*(YU-YD));
  }

  printf("%.12lf\n", S);


  return 0;
}

Measured memory_bytes: 256