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

int adj[100][2];

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    int k;
    cin >> k;

    for(int i = 1; i <= 15; i++) {
        adj[i][0] = 2*i;
        adj[i][1] = 2*i+1;
    }

    for(int i = 16; i <= 31; i++) {
        if(k % 2)
            adj[i][0] = 2*i;
        k /= 2;
        if(k % 2)
            adj[i][1] = 2*i+1;
        k /= 2;

    }

    for(int i = 32; i < 63; i++) {
        adj[i+1][0] = i;
        adj[i+1][1] = i+32;
        adj[i+32][0] = i;
    }

    adj[32][0] = 100;

    cout << 100 << "\n";
    for(int i = 1; i <= 100; i++) {
        for(int j = 0; j < 2; j++) {
            cout << (adj[i][j] == 0 ? -1 : adj[i][j]) << " ";
        }
        cout << "\n";
    }

    return 0;
}