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#include <cstdio>

int main() {
    int N;
    scanf("%d", &N);

    printf("100\n");
    for (int i=1; i<=98; ++i) {
        if (i%2 == 1) {
            printf("%d %d\n",i+1, i+2);
        } else {
            printf("%d %d\n", i+1, (N&1)?100:-1);
            N>>=1;
        }
    }
    printf("-1 -1\n-1 -1\n");
    return 0;
}