
ZOJ Problem Set  3957
In computer science, the KnuthMorrisPratt string searching algorithm (or KMP algorithm) searches for occurrences of a "word" W within a main "text string" S by employing the observation that when a mismatch occurs, the word itself embodies sufficient information to determine where the next match could begin, thus bypassing reexamination of previously matched characters. Edward is a fan of mathematics. He just learnt the KnuthMorrisPratt algorithm and decides to give the following problem a try: Find the total number of occurrence of the strings "cat" and "dog" in a given string s. As Edward is not familiar with the KMP algorithm, he turns to you for help. Can you help Edward to solve this problem? InputThere are multiple test cases. The first line of input contains an integer T (1 ≤ T ≤ 30), indicating the number of test cases. For each test case: The first line contains a string s (1 ≤ s ≤ 1000). OutputFor each case, you should output one integer, indicating the total number of occurrence of "cat" and "dog" in the string. Sample Input7 catcatcatdogggy docadosfascat dogdddcat catcatcatcatccat dogdogdogddddooog dcoagtcat doogdog Sample Output4 1 2 5 3 1 1 HintFor the first test case, there are 3 "cat" and 1 "dog" in the string, so the answer is 4. For the second test case, there is only 1 "cat" and no "dog" in the string, so the answer is 1. Author: WANG, Yucheng Source: The 17th Zhejiang University Programming Contest Sponsored by TuSimple 