java大数类

 1 import java.util.Scanner;
 2 
 3 public class Main{
 4     public static void main(String[] args){
 5         int n;
 6         double p;
 7         Scanner cin = new Scanner(System.in);
 8         while(true){
 9             n = cin.nextInt();
10             p = cin.nextDouble();
11             if(n == 0 && p == 0) break;
12             System.out.printf("%.0f\n", Math.pow(p, 1.0/n));
13         }
14     }
15 }

 1 import java.io.*;
 2 import java.math.*;
 3 import java.util.*;
 4 import java.text.*;
 5 
 6 public class Main 
 7 {
 8     public static void main(String[] args) 
 9     {
10         Scanner cin = new Scanner(System.in);
11         while(cin.hasNext())
12         {
13        BigDecimal R = cin.nextBigDecimal();
14        int n = cin.nextInt();
15          String ans = R.pow(n).stripTrailingZeros().toPlainString();
16          if(ans.startsWith("0"))
17              ans = ans.substring(1);
18          System.out.println(ans);
19        }
20     }
21 }

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16 18
17 import java.util.Scanner;
18 import java.math.BigInteger;
19 public class Main{
20     public static void main(String[] args){
21         Scanner input = new Scanner(System.in);
22         int A, i;
23         while(input.hasNext())
24         {    
25             A = input.nextInt();
26             BigInteger B = BigInteger.ONE;
27             for(i=1; i<=A; i++)
28             {
29                 B = B.multiply(BigInteger.valueOf(i));
30             }
31             System.out.println(B);
32         }
33     }
34 }

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47 49
48 #include<iostream>
49 #include<string.h>
50 #include<stdio.h>
51 #include<ctype.h>
52 #include<algorithm>
53 #include<stack>
54 #include<queue>
55 #include<set>
56 #include<map>
57 #include<math.h>
58 #include<vector>
59 #include<deque>
60 #include<list>
61 #define INF 0x7fffffff
62 #define inf 0x3f3f3f3f
63 #define maxn 40000
64 using namespace std;
65 int a[maxn];
66 int main()
67 {
68     int n;
69     int s;
70     while(scanf("%d",&n)!=EOF)
71     {
72         memset(a,0,sizeof(a));
73         a[0]=1;
74         for(int i=2; i<=n; i++)
75         {
76             int c=0;
77             for(int j=0; j<maxn; j++)
78             {
79                 s=a[j]*i+c;
80                 a[j]=s%10;
81                 c=s/10;
82             }
83         }
84         int p;
85         for(int i=maxn; i>=0; i--)
86             if(a[i])
87             {
88                 p=i;
89                 break;
90             }
91         for(int i=p; i>=0; i--)
92             printf("%d",a[i]);
93         printf("\n");
94     }
95     return 0;
96 }

 1 import java.io.*;
 2 import java.math.*;
 3 import java.util.*;
 4 import java.text.*;
 5 
 6 public class Main 
 7 {
 8     public static void main(String[] args) 
 9     {
10         Scanner cin = new Scanner(System.in);
11         while(cin.hasNext())
12         {
13           int t = cin.nextInt();
14           BigDecimal ans = BigDecimal.ONE;
15           while(t-- > 0)
16             {
17            String str = cin.next();
18            int l = str.length();
19            str = str.substring(0, l - 1);
20            int tep = Integer.parseInt(str);
21           BigDecimal Tep = BigDecimal.valueOf(tep);
22            Tep = Tep.divide(BigDecimal.valueOf(100));
23            ans = ans.multiply(Tep);
24             }
25           System.out.println(ans.stripTrailingZeros().toPlainString());
26         }
27     }
28 }