This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
#define ll long long
const int N = 2e5 + 5, MOD = 1e9 + 7;
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int k;
cin >> k;
if(k == 0)
{
cout << 1 << " " << 0 << '\n';
return 0;
}
cout << 2 * k << " " << k << '\n';
for(int i = 1; i <= k; i += 2)
{
cout << i << " " << i + 1 << '\n';
}
}
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