#include <bits/stdc++.h>
#define endl "\n"
#define INT long long int

using namespace std;

char infile[100], outfile[100];
int A[110][110];
int main() {
	int I,a,b,i;
	for(I=1;I<=100;I++){
        sprintf(infile, ".%d.in", I);
        freopen(infile, "w", stdout);
        printf("100\n");
        for(i=1;i<101;i++){
        	printf("%d %d\n",I,i);
		}	
    }
}