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

void solve(int t){
    int n;
    cin>>n;
    
    vector<pair<int,int>> a,b;
    
    int lato1=5,lato2=2;
    int num=11;
    
    while(a.size()+num<=n && lato1<=499){
        
        for(int i=0;i<4;i++){
            a.push_back({lato2,lato1});
        }
        a.push_back({lato2+lato2,lato1});
        
        for(int i=0;i<5;i++){
            a.push_back({lato1,lato2});
        }
        a.push_back({lato1,lato2+lato2});
        
        
        for(int i=0;i<5;i++){
            b.push_back({lato1,lato2});
            b.push_back({lato2,lato1});
        }
        b.push_back({lato2+lato2,lato2+lato2});
        
        lato1*=1;
        lato2*=1;
    }
    
    while(a.size()<n){
        a.push_back({1,1});
        b.push_back({1,1});
    }
    
    for(auto [i,j] : b){
        cout<<i+500<<" "<<j<<"\n";
    }
    for(auto [i,j] : a){
        cout<<i+500<<" "<<j<<"\n";
    }
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    
    int t=1;
    //cin>>t;
    for(int i=1;i<=t;i++)solve(i);
    
    return 0;
}