/*
 * Program used in the experimental evaluation of the following paper.
 * 2010SAS - Alias,Darte,Feautrier,Gonnord, Multi-dimensional Rankings, Program Termination, and Complexity Bounds of Flowchart Programs
 *
 * Date: 2014
 * Author: Caterina Urban
 */

typedef enum {false, true} bool;

extern int __VERIFIER_nondet_int(void);

int main() {
    int N, x, y, i, r;
	N = 10;
    x = 0;
    y = 0;
    i = 0;
	while (i < N) {
		i = i + 1;
		r = __VERIFIER_nondet_int();
		if (r >= 0 && r <= 3) {
			if (r == 0) {
				x = x + 1;
			} else {if (r == 1) {
				x = x - 1;
			} else {if (r == 2) {
				y = y + 1;
			} else {if (r == 3) {
				y = y - 1;
            }}}}
		}
	}
	return 0;
}