/*
 * 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 x, y, m;
	y = 0;
    m = __VERIFIER_nondet_int();
    x = m;
	while (x >= 0 && y >= 0) {
		if (__VERIFIER_nondet_int() != 0) {
			while (y <= m && __VERIFIER_nondet_int() != 0) {
				y = y + 1;
			}
			x = x - 1;
		}
		y = y - 1;
	}
	return 0;
}