Untitled

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
unsigned long offices[1679617];
 
struct stos
{
	unsigned long value;
	struct stos* before;
};
struct stos *stack;
 
void push(unsigned long val)
{
	struct stos *tmp = (struct stos*)malloc(sizeof(struct stos));
	tmp->value = val;
	tmp->before = stack;
	stack = tmp;
}
unsigned long pop()
{
	unsigned long t = stack->value;
	struct stos *tmp = stack->before;
	free(stack);
	stack = tmp;
	return t;
}
struct recruts
{
	int pesel;
	int code;
};
 
int compare(const void *a, const void *b)
{
	struct recruts* r1 = (struct recruts*) a;
	struct recruts* r2 = (struct recruts*) b;
 
	if(r1->pesel > r2->pesel)
		return 1;
	else if(r1->pesel < r2->pesel)
		return -1;
	else
		return 0;
}
 
int main()
{
	int s, p, z, i;
 
	char pesel[12];
	char mru[5];
	char to[5];
 
	unsigned long temp;
	int office;
 
	struct recruts boys[100000];
	struct recruts *r;
 
	scanf("%d", &s);
 
	while(s--)
	{
		memset(offices, 0, sizeof(unsigned long) * 1679617);
 
		scanf("%d", &p);
 
		for(i=0; i<p; i++)
		{
			scanf("%s %s", &pesel[0], &mru[0]);
 
			boys[i].pesel = (int)strtoul(pesel + 2, NULL, 10);
			boys[i].code  = (int)strtoul(mru, NULL, 36);
		}
		qsort(boys, p, sizeof(struct recruts), compare);
 
		scanf("%d", &z);
		while(z--)
		{
			scanf("%s %s", &mru[0], &to[0]);
			offices[(int)strtoul(mru, NULL, 36)] = strtoul(to, NULL, 36);
		}
 
		scanf("%d", &z);
 
		while(z--)
		{
			scanf("%s", &pesel[0]);
			temp = strtoul(pesel + 2, NULL, 10);
			r = bsearch(&temp, boys, p, sizeof(struct recruts), compare);
 
			office = r->code;
 
			stack = (struct stos*)malloc(sizeof(struct stos));
			stack->before = NULL;
			stack->value = office;
 
			while(offices[office] != 0)
			{
				office = offices[office];
				push(office);
			}
 
			pop();
			int tmp;
 
			while(stack!=NULL)
			{
				tmp = pop();
				offices[tmp] = office;
			}
			free(stack);
 
			mru[3] = 48 + office % 36;
			office /= 36;
 
			mru[2] = 55 + office % 36;
			office /= 36;
 
			mru[1] = 55 + office % 36;
			office /= 36;
 
			mru[0] = 55 + office % 36;
 
			printf("%s %s\n", pesel, mru);
		}
		printf("\n");
	}
	return 0;
}