URI 1002 - Area of a Circle

#include<stdio.h>
int main()
{
    double R,A;
    scanf("%lf",&R);
    A = 3.14159 * (R*R);
    printf("A=%.4lf\n",A);

    return 0;
}

URI 1001 - Extremely Basic

#include<stdio.h>
int main()
{
   int A,B,X ;
   scanf("%d %d",&A,&B);
   X=A+B;
   printf("X = %d\n",X);
   return (0);
}