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#include <cstdio>
using namespace std;
typedef long long LL;

const int P = 30;

LL k;


int main() {
  scanf("%lld", &k);
  printf("%d\n", 3*P + 1);
  for (int i = 0; i < P; ++i, k >>= 1) {
    printf("%d %d\n", 2*i + 2, 2*i + 3);
    printf("%d %d\n", 2*i + 3, k & 1 ? 2*P + 2 + i : -1);
  }
  puts("-1 -1");
  for (int i = 0; i < P - 1; ++i) printf("%d -1\n", 2*P + 3 + i);
  puts("-1 -1");
  return 0;
}