HDU 1178 Heritage from father
2012-08-22 13:19
716 查看
Heritage from father
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 131070/65535 K (Java/Others)Total Submission(s): 3705 Accepted Submission(s): 1309
[align=left]Problem Description[/align]
Famous Harry Potter,who seemd to be a normal and poor boy,is actually a wizard.Everything changed when he had his birthday of ten years old.A huge man called 'Hagrid' found Harry and lead him to a new world full of magic power.
If you've read this story,you probably know that Harry's parents had left him a lot of gold coins.Hagrid lead Harry to Gringotts(the bank hold up by Goblins). And they stepped into the room which stored the fortune from his father.Harry was astonishing ,coz
there were piles of gold coins.
The way of packing these coins by Goblins was really special.Only one coin was on the top,and three coins consisted an triangle were on the next lower layer.The third layer has six coins which were also consisted an triangle,and so on.On the ith layer there
was an triangle have i coins each edge(totally i*(i+1)/2).The whole heap seemed just like a pyramid.Goblin still knew the total num of the layers,so it's up you to help Harry to figure out the sum of all the coins.
[align=left]Input[/align]
The input will consist of some cases,each case takes a line with only one integer N(0<N<2^31).It ends with a single 0.
[align=left]Output[/align]
对于每个输入的N,输出一行,采用科学记数法来计算金币的总数(保留三位有效数字)
[align=left]Sample Input[/align]
1 3 0
[align=left]Sample Output[/align]
1.00E0 1.00E1 HintHint when N=1 ,There is 1 gold coins. when N=3 ,There is 1+3+6=10 gold coins.
题意:s(n)=n*(n+1)*(n+2)/6;
AC代码:
#include<iostream> #include<math.h> using namespace std; int main() { double n,a,m,b; while(scanf("%lf",&n)!=EOF&&n!=0) { b=log10(n*1.0/6)+log10((n+1)*1.0)+log10((n+2)*1.0); a=b-(int)(b); m=pow(double(10),a); printf("%.2lfE%d\n",m,(int)(b)); } return 0; }
相关文章推荐
- 1178 hdu Heritage from father
- HDU 1178 Heritage from father
- hdu 1178 Heritage from father
- hdu 1178 Heritage from father
- HDU--1178--Heritage from father(求和公式)
- HDU 1178 Heritage from father
- hdu(1178)Heritage from father
- HDU 1178 Heritage from father 数学公式 JAVA
- 【ACM】杭电1178:Heritage from father 小心溢出!
- HDU-Heritage from father-数列&&科学记数法
- HDU ACM 1178 Heritage from father
- 【ACM】杭电1178:Heritage from father 小心溢出!
- HDU Heritage from father
- hdoj 1178 Heritage from father (数学题)
- 数学—杭电1178 Heritage from father
- 杭电1178--Heritage from father
- 杭电1178 Heritage from father
- hdoj-1178-Heritage from father【科学计数法表示】
- hdu1178数学题 Heritage from father
- 杭电 - Heritage from father