= I Think I Need a Houseboat =
http://acm.zju.edu.cn/show_problem.php?pid=1049

{{{#!cplusplus
/*written by czk*/
#include <stdio.h>
#include <math.h>
int main() {
    int t, i;
    scanf("%d", &t);
    for(i = 1; i <= t; i++) {
        double x, y;
        scanf("%lf%lf", &x, &y);
        double square_radius = x*x + y*y;
        double area = 3.141592653589793 * square_radius * 0.5;
        printf("Property %d: This property will begin eroding in year %.0f.\n", i, floor(area / 50.0) + 1);
    }
    printf("END OF OUTPUT.\n");
}

}}}