View Code of Problem 18

#include<stdio.h>
#include<stdbool.h>
int count(int a[],int g){
 a[3]=1;
a[4]=2;
for(int i=5;i<=100000;i++){
    a[i]=a[i-1]+(i+1)/2-1;
}
printf("%d\n",a[g]);
}
int main() {
int a[100000]={};
int f;
while((scanf("%d",&f))!=EOF){
count(a,f);
}
	return 0;
}