POJ_1005_I Think I Need a Houseboat

#include<stdio.h>
#define PI 3.1415926

int main(){
int n, j;
double x, y;
scanf("%d", &n);
for (int i = 1; i <= n; i++){
scanf("%lf%lf", &x, &y);
j = (x*x + y*y)*PI / 100;//(x,y)所在半圆面积/每年侵蚀面积
j++;
printf("Property %d: This property will begin eroding in year %d.\n", i, j);
}
printf("END OF OUTPUT.\n");
return 0;
}