#include <stdio.h> int main(){ int n,k=0,i,a[1000]={0}; for(i=1;i<1000;i++){ a[i]=a[i-1]+k; if(i%2==0) k++; } while(~scanf("%d",&n)){ printf("%d\n",a[n]); } }
Double click to view unformatted code.