#include <stdio.h>

int n = 1;
int m;

int f(int n)
{
    m = n;
    n = 3;
    printf("A: n = %d\n", n);

    {
	int n;
	n = 7;
	printf("B: n = %d\n", n);
    }
    printf("C: n = %d\n", n);
    n = 2;
    return m * 2;
}


int main(void)
{
    int p, q;

    printf("D: m = %d\n", m);
    printf("E: n = %d\n", n);
    printf("F: p = %d\n", p);

    p = 5;
    q = f(p);
    printf("G: m = %d\n", m);
    printf("H: n = %d\n", n);
    printf("I: p = %d\n", p);
    printf("J: q = %d\n", q);
    return 0;
}