#include <stdio.h>

#define Nmax 100100

int n, x[Nmax], y[Nmax];

int main() {
  freopen("cadrane.in" , "r", stdin );
  freopen("cadrane.out", "w", stdout);
  
  scanf("%d", &n);
  
  for (int i = 1; i <= n; ++i)
    scanf("%d%d", &x[i], &y[i]);

  int best = 0;
    
  for (int i = 1; i <= n; ++i) {
    int MinA = 123456789;
    int X = x[i];
    for (int j = 1; j <= n; ++j) {
      int Y = y[j];
      int pctA = 0;
      for (int k = 1; k <= n; ++k) {
        if ( (x[k] >= X && y[k] >= Y) || (x[k] <= X && y[k] <= Y) )
          ++pctA;
      }
      if (pctA < MinA)
        MinA = pctA;
    }
    if (MinA > best)
      best = MinA;
  }

  printf("%d\n", best);

  return 0;
  
  for (int i = 1; i <= n; ++i) {
    int MinA = 123456789;
    int X = x[i];
    for (int j = 1; j <= n; ++j) {
      int Y = y[j];
      int pctA = 0;
      for (int k = 1; k <= n; ++k) {
        if ( (x[k] >= X && y[k] >= Y) || (x[k] <= X && y[k] <= Y) )
          ++pctA;
      }
      if (pctA < MinA)
        MinA = pctA;
    }
    if (MinA == best)
      printf("%d %d\n", x[i], y[i]);
  }

  return 0;
}