I think i need a houseboot C语言 UVA2363

使用题给数据计算出面积，然后向上取整，若向下取整会提前1年失去土地。

然后使用一个for循环得到失去土地的时间

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int main(void){
    int n,i,j;
    int s;
    double pi=3.1415926;
    double *x,*y;
    double r;
    while(scanf("%d",&n)==1){
        x=(double *)malloc(n*sizeof(double));
        y=(double *)malloc(n*sizeof(double));
        for(i=0;i<n;i++) scanf("%lf %lf",&x[i],&y[i]);
        for(i=0;i<n;i++){
            r=sqrt(x[i]*x[i]+y[i]*y[i]);
            s=(int)(pi*r*r/2);
            for(j=1;s>j*50;j++);
            printf("Property %d: This property will begin eroding in year %d.\n",i+1,j);
        }
        printf("END OF OUTPUT.");
    }
    return 0;
}