POJ-1005

#include <stdio.h>#include <math.h>#define PI 3.1415926int get_year(double x, double y);int main(void) {    int n;    int i = 0;    double x, y;        scanf("%d", &n);    while (i < n) {        i++;        scanf("%lf%lf", &x, &y);        printf("Property %d: This property will begin eroding in year %d.\n",            i, get_year(x, y));    }     printf("END OF OUTPUT.\n");        return 0;}int get_year(double x, double y) {    int i = 0;    double r = 0.0;    double s = 0.0;    double v = x * x + y * y;        while (v > r * r) {        s += 50;        r = sqrt(2 * s / PI);               i++;    }        return i;}