POJ 3087 Shuffle'm Up (模拟)
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Description
A common pastime for poker players at a poker table is to shuffle stacks of chips. Shuffling chips is performed by starting with two stacks of poker chips,S1 and S2, each stack containingC chips. Each stack may contain chips of several different colors.
The actual shuffle operation is performed by interleaving a chip from S1 with a chip from S2 as shown below forC = 5:
The single resultant stack, S12, contains 2 * C chips. The bottommost chip of S12 is the bottommost chip fromS2. On top of that chip, is the bottommost chip from S1. The interleaving process continues taking the 2nd chip from the bottom ofS2 and placing that on S12, followed by the 2nd chip from the bottom ofS1 and so on until the topmost chip from S1 is placed on top ofS12.
After the shuffle operation, S12 is split into 2 new stacks by taking the bottommostC chips from S12 to form a newS1 and the topmost C chips fromS12 to form a new S2. The shuffle operation may then be repeated to form a newS12.
For this problem, you will write a program to determine if a particular resultant stackS12 can be formed by shuffling two stacks some number of times.
Input
The first line of input contains a single integer N, (1 ≤N ≤ 1000) which is the number of datasets that follow.
Each dataset consists of four lines of input. The first line of a dataset specifies an integerC, (1 ≤ C ≤ 100) which is the number of chips in each initial stack (S1 andS2). The second line of each dataset specifies the colors of each of theC chips in stack S1, starting with the bottommost chip. The third line of each dataset specifies the colors of each of theC chips in stack S2 starting with the bottommost chip. Colors are expressed as a single uppercase letter (A throughH). There are no blanks or separators between the chip colors. The fourth line of each dataset contains 2 *C uppercase letters (A through H), representing the colors of the desired result of the shuffling of S1 and S2 zero or more times. The bottommost chip’s color is specified first.
Output
Output for each dataset consists of a single line that displays the dataset number (1 thoughN), a space, and an integer value which is the minimum number of shuffle operations required to get the desired resultant stack. If the desired result can not be reached using the input for the dataset, display the value negative 1 (−1) for the number of shuffle operations.
Sample Input
24AHAHHAHAHHAAAAHH3CDECDEEEDDCC
Sample Output
1 22 -1
#include<cstdio>#include<cmath>#include<cstring>#include<iostream>#include<queue>#define N 50using namespace std;int main(){ int Case,n,i,len,cnt; char str1[210],str2[210],ans[420],str11[210],str22[210],temp[420]; cin >> Case; for(int k=1; k<=Case; k++) { cin >> n; cin >> str1 >> str2 >> ans; len = strlen(str1); for(i=0; i<len; i++) { str11[i] = str1[i]; str22[i] = str2[i]; } str11[i] = str22[i] =0; int count=0; while(1) { cnt = 0; for(i=0; i<len; i++) { temp[cnt++] = str22[i]; temp[cnt++] = str11[i]; } temp[cnt] = 0; count++; if(strcmp(temp,ans)==0) { printf("%d %d\n",k,count); break; } cnt = 0; for(i=0; i<len; i++) { str11[cnt++] = temp[i]; } str11[cnt]=0; cnt =0 ; for(i=len; i<2*len; i++) { str22[cnt++] = temp[i]; } str22[cnt] = 0; if(strcmp(str11,str1)==0) { printf("%d -1\n",k); break; } } } return 0;}
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