2009-04-23 20:18:56來源不明
ACM 11150 11150 - Cola
居然有規律 冏了
Snail程式碼
/***************************************************************/
//11150 - Cola (by Snail)
#include<stdio.h>
#include<stdlib.h>
main()
{
int n,m;
while(scanf("%d",&n)==1)
printf("%d\n",n*3/2);
return 0;
}
/*答案 = n + n/3 + n/9 + n/81 + n/243 + .... 等比級數*/
不是等比級數吧
n = 98時答案為147 (98*3/2 =147)
98 + 98/3 + 98/9 + 98/27 + 98/81
=98 + 32 + 10 + 3 + 1 = 144