PKU题解Word文档格式.docx

1、【题解】A+b【参考程序】Program gh;Var a,b:longint;Begin Readln（a,b）; Writeln（a+b）;End.求高精度幂对数值很大、精度很高的数进行高精度计算是一类十分常见的问题。比如，对国债进行计算就是属于这类问题。 现在要你解决的问题是：对一个实数R（ 0.0 R 99.999 ），要求写程序精确计算 R 的 n 次方（Rn），其中n 是整数并且 0 n 1） do dec（lc）; mul:=c;end;mulbeginmain while not eof do readln（s）; val（copy（s,pos（ ,s）+1,length（s）

2、-pos（,s）,n）;=copy（s,1,pos（,s）-1）; while slength（s）=0 do delete（s,length（s）,1）; la:=length（s）;=1 to length（s） do if si. then dec（la）; ala:=ord（si）-ord（）; endIF else k:=i; k:=length（s）-k;=k*n;=a;=length（s）-1;=la;=1 to n-1 do=mul（a,c,la,lc）; if klc then write（=k-1 downto lc doIF=lc downto 1 do if i=k t

3、hen write（,ci） else write（ci）; writeln;WHILEend.P1002 487-3279Businesses like to have memorable telephone numbers. One way to make a telephone number memorable is to have it spell a memorable word or phrase. For example, you can call the University of Waterloo by dialing the memorable TUT-GLOP. Some

4、times only part of the number is used to spell a word. When you get back to your hotel tonight you can order a pizza from Ginos by dialing 310-GINO. Another way to make a telephone number memorable is to group the digits in a memorable way. You could order your pizza from Pizza Hut by calling their

5、three tens number 3-10-10-10. The standard form of a telephone number is seven decimal digits with a hyphen between the third and fourth digits （e.g. 888-1200）. The keypad of a phone supplies the mapping of letters to numbers, as follows:A, B, and C map to 2 D, E, and F map to 3 G, H, and I map to 4

6、 J, K, and L map to 5 M, N, and O map to 6 P, R, and S map to 7 T, U, and V map to 8 W, X, and Y map to 9 There is no mapping for Q or Z. Hyphens are not dialed, and can be added and removed as necessary. The standard form of TUT-GLOP is 888-4567, the standard form of 310-GINO is 310-4466, and the s

7、tandard form of 3-10-10-10 is 310-1010. Two telephone numbers are equivalent if they have the same standard form. （They dial the same number.） Your company is compiling a directory of telephone numbers from local businesses. As part of the quality control process you want to check that no two （or mo

8、re） businesses in the directory have the same telephone number. The input will consist of one case. The first line of the input specifies the number of telephone numbers in the directory （up to 100,000） as a positive integer alone on the line. The remaining lines list the telephone numbers in the di

9、rectory, with each number alone on a line. Each telephone number consists of a string composed of decimal digits, uppercase letters （excluding Q and Z） and hyphens. Exactly seven of the characters in the string will be digits or letters. Generate a line of output for each telephone number that appea

10、rs more than once in any form. The line should give the telephone number in standard form, followed by a space, followed by the number of times the telephone number appears in the directory. Arrange the output lines by telephone number in ascending lexicographical order. If there are no duplicates in the input print the line:No duplicates. 124873279ITS-EASY888-45673-10-10-10888-GLOPTUT-GLOP967-11-11310-GINOF101010888-1200-4-8-7-3-2-7-9-487-3279310-1010 2487-3279 4888-4567 3East Central North America 1999Des