HDU 5414 CRB and String (idea title)

Test instructions

Give you two strings of S and T, you can arbitrarily select a character C in the string s, insert a character d after the character C (d!=c), and ask how many times this operation can convert the string s into a string T.

Analytical:

Don't think too complicated, just discuss it clearly.
1. If |s|>|T| , then no matter how the combination can not constitute T.
2. If s [ 0 ! = t [ 0 , no matter how the combination, also can not constitute T.
3. The above two situations are better considered, then find the longest common prefix of two strings.
If the longest public prefix of S equals |t| indicates that two strings are exactly the same, this can be done by constructing t because the above has been removed |s|>|T| The situation.
4. Since the characters inserted in the following cannot be the same as the characters in front of them, then judging the common prefix of two strings, is not all a letter, if all is a letter, then if the current character to be inserted is the same as the preceding character, then cannot construct T.
5. Exclude 4 of this situation, then you can arbitrarily construct the desired string, because if different, you can arbitrarily construct the following character, the same, you can insert a character after the preceding different characters, equal to construct an identical character.
So the same thing two pointers go forward together, otherwise t's pointer pushes forward to determine if the last S has any remaining.

my code

#include <cstdio>#include <cstring>#include <algorithm>#include <string>using namespace STD;Const intN = (int)1e5+Ten;CharPat[n], tar[n];BOOLJudge () {intLENP =strlen(PAT), LenT =strlen(TAR);if(pat[0]! = tar[0] || LENP > LenT)return false;inti =0, j =0;BOOLdiff =false; while(I < LENP) {if(Pat[i] = = Tar[j]) i++, j + +;Else  Break;if(I >1&& pat[i-1]! = pat[i-2]) diff =true; }if(i = = LenT)return true;if(!diff && tar[j] = = tar[j-1])return false; while(J < LenT) {if(Pat[i] = = Tar[j]) i++;    j + +; }if(i = = LENP)return true;return false;}intMain () {intTscanf("%d", &t); while(t--) {scanf("%s%s", Pat, TAR);puts(Judge ()?"Yes":"No"); }return 0;}

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HDU 5414 CRB and String (idea title)