UVA Problem#10432

Question:

http://uva.onlinejudge.org/external/104/10432.html 

Solution technique: 

1. take inputs 

2. define pi as acos(-1.0) 

3. use the formula below to find the output:

area = (n*r*r*(sin(2.0*pi/n)))/2; 

  

UVA Problem#10370

Question:

http://uva.onlinejudge.org/external/103/10370.html 

Solution:

1. take inputs c, n, and the numbers in an array a[]

2. add all the elements of the array and find the average.

3. now check for the following condition and print the result:

int main(){

....

..... 

for(j=0; j>n; j++){ 

if(a[j]<avg)count++; 

} 

r = (count/n)*100; 

printf("%.3lf%c\n", r, d);   

 }