#include <stdio.h>
#include <stdlib.h>
#define ITERS 1000
#define BIG	1000

double next (double x, double c){
	return x*x+c;
}

int main(int argc, char *argv[]){
	int i,n;
	double x,c;
	c = atof(argv[1]);
	x = 0;
	i = 0;
	while (i<ITERS && x<BIG){
		x = next(x,c);
		i++;
	}
	if (i<ITERS){
		printf("It diverges\n");
	}else{
		printf("It does not diverge\n");
	}
	return 0;
}