tju 4076 word count ( 读入）

4076.   Words Count

Time Limit: 1.0 Seconds    Memory Limit: 65536K

Total Runs: 259   

Accepted Runs: 126

This task is very simply, give you an article, you should just output how many words there are.
The words may be split by any separator such as ',' and '.' and so on.
The words only contains letters or digit and its length is at least one.

Input

Only one case, may have a lot of lines.

Output

Output the number of words.

Sample Input

Give you two strings, which are combined by two kinds of char 'x' and 'y'.
In this task, the first string is always longer than the second string.
If the first string's length is L, and the second string's length is M, you can easily know that there will be L-M+1 substrings of the first string, whose length is the same as the second string.
In these substrings, you can change some 'x' to 'y' or 'y' to 'x', in order to make this string the same as the second string.
And of course, different string may need to change different number of chars to achieve this target.
Here, tmeteorj wants to know how many substring, which has the same size as the second string, can be changed to be the same as second string exactly by change K chars.
Since tmeteorj is a very boring man, he wants to ask you Q times of such boring question.
Of course you are not such boring, so you decide to write a program to answer those questions.
Input
In the first two lines, there will be two string.
Followed by a positive integer q, means tmeteorj has q questions.
There will be q positive integer, indicating the exactly change times in this question.
The program should be process to EOF.
Be careful, the length of the string will no longer than 100000, and the number of questions will no bigger than 10000.
Output
For each question, you should just output one line, indicates the number of different ways to make the second string be the substring of the first string.

To make problem simple, you can only change the first string.
Sample Input
xxxxxyxxxxxxxx
yy
2
1
2
yyyyy
x
3
1
2
3
Sample Output
2
11
5
0
0

Sample Output

304

Source: TJU Team Selection 2014 Round1

题意：　简单

题目分析：　考读入

#include <iostream>
#include <algorithm>
#include <cstdio>
#include <cstring>
#include <cctype>

using namespace std;

char str[50007];

int main ( )
{
   int cnt = 0;
   while ( ~scanf ( "%s" ,str ) )
   {
       int i = 0;
       while ( str[i] )
       {
            if ( isalnum ( str[i] ) )
            {
                i++, cnt++;
                while ( isalnum ( str[i] ) ) i++; 
            }
            if ( str[i] ) i++;
       }
   }
   printf ( "%d\n" , cnt  );
}