N!
Time Limit: 10000/5000 MS (Java/Others) Memory Limit: 262144/262144 K (Java/Others)
Total Submission(s): 95835 Accepted Submission(s): 28507
Problem Description
Given an integer N(0 ≤ N ≤ 10000), your task is to calculate N!
Input
One N in one line, process to the end of file.
Output
For each N, output N! in one line.
Sample Input
1
2
3
Sample Output
1
2
6
Author
JGShining(极光炫影)
求N!
复习一下高精度。。。其实也就是简单模拟
/*高精度*/
/*10000! 总共 36000 位*/
#include <iostream>
#include <cstdio>
#include <string>
#include <cstring>
#include <algorithm>
#include <queue>
#include <stack>
#define ll long long
#define Max 36001
using namespace std;
int main() {
int n,num[Max];
while(cin>>n) {
memset(num,0,sizeof(num));
num[0]=1;//长度
num[1]=1;
for(int i=2; i<=n; i++) {
int len=num[0];
for(int j=1; j<=len; j++)
num[j]*=i;
//处理进位
for(int j=1; j<=num[0]; j++) {
if(num[j]>9) {
num[j+1]+=num[j]/10;
num[j]%=10;
}
if(num[num[0]+1]) num[0]++;//长度更新
}
}
// cout<<num[0]<<endl;
for(int i=num[0]; i>=1; i--)
cout<<num[i];
cout<<endl;
}
return 0;
}