Surprising Strings--映射

Description

The D-pairs of a string of letters are the ordered pairs of letters that are distance D from each other. A string is D-unique if all of its D-pairs are different. A string is surprising if it is D-unique for every possible distance D.

Consider the string ZGBG. Its 0-pairs are ZG, GB, and BG. Since these three pairs are all different, ZGBG is 0-unique. Similarly, the 1-pairs of ZGBG are ZB and GG, and since these two pairs are different, ZGBG is 1-unique. Finally, the only 2-pair of ZGBG is ZG, so ZGBG is 2-unique. Thus ZGBG is surprising. (Note that the fact that ZG is both a 0-pair and a 2-pair of ZGBG is irrelevant, because 0 and 2 are different distances.)

Acknowledgement: This problem is inspired by the "Puzzling Adventures" column in the December 2003 issue of Scientific American.

Input Description

The input consists of one or more nonempty strings of at most 79 uppercase letters, each string on a line by itself, followed by a line containing only an asterisk that signals the end of the input. There are less than 1200 cases.

Output Description

For each string of letters, output whether or not it is surprising using the exact output format shown below.

Sample Input

ZGBGXEEAABAABAAABBBCBABCC*

Sample Output

ZGBG is surprising.X is surprising.EE is surprising.AAB is surprising.AABA is surprising.AABB is NOT surprising.BCBABCC is NOT surprising.

/*最多有79个字母，样例数不超过1200个*/#include <iostream>#include <cstdio>#include <map>#include <cstring>#include <string>using namespace std;map <string,int> ph;//长度为len的话，只需枚举到长度len-2int main(){char A[88];while(cin>>A&&A[0]!='*'){bool flag=true;int len=strlen(A);for(int i=0;i<=len-2;i++){ph.clear();for(int j=0;j<len-i;j++){string a;a.push_back(A[j]);a.push_back(A[j+i+1]);if(!ph[a]){ph[a]=1;}else{flag=false;goto L;}}}L:if(flag){cout<<A<<" is surprising."<<endl;}else cout<<A<<" is NOT surprising."<<endl;}return 0;}