#include <bits/stdc++.h>
using namespace std;
inline char gc() {
  static char buf[100000], *p1 = buf, *p2 = buf;
  return p1 == p2 && (p2 = (p1 = buf) + fread(buf, 1, 100000, stdin), p1 == p2)
             ? EOF
             : *p1++;
}
inline long long read() {
  long long x = 0;
  char ch = getchar();
  bool positive = 1;
  for (; !isdigit(ch); ch = getchar())
    if (ch == '-') positive = 0;
  for (; isdigit(ch); ch = getchar()) x = x * 10 + ch - '0';
  return positive ? x : -x;
}
inline void write(long long a) {
  if (a < 0) {
    a = -a;
    putchar('-');
  }
  if (a >= 10) write(a / 10);
  putchar('0' + a % 10);
}
inline void writeln(long long a) {
  write(a);
  puts("");
}
inline void wri(long long a) {
  write(a);
  putchar(' ');
}
int main() {
  int n = read(), t = n / 2, dq = 0;
  for (int i = 1; i <= t; i++) {
    cout << i << " " << (t + 1) / 2 << endl;
    dq++;
  }
  for (int i = 1; i <= t; i++)
    if (i != (t + 1) / 2) {
      cout << (t + 1) / 2 << " " << i << endl;
      dq++;
    }
  if (n - dq == 2) {
    cout << (t + 1) / 2 << " " << t + 1 << endl
         << t + 1 << " " << (t + 1) / 2 << endl;
  } else if (n - dq == 1) {
    cout << (t + 1) / 2 << " " << t + 1 << endl;
  }
}
