/* Periodic Strings A character string is said to have period k if it can be formed by concatenating one or more repetitions of another string of length k. For example, the string "abcabcabcabc" has period 3, since it is formed by 4 repetitions of the string "abc". It also has periods 6 (two repetitions of "abcabc") and 12 (one repetition of "abcabcabcabc"). Write a program to read a character string and determine its smallest period. Input The first line oif the input file will contain a single integer N indicating how many test case that your program will test followed by a blank line. Each test case will contain a single character string of up to 80 non-blank characters. Two consecutive input will separated by a blank line. Output An integer denoting the smallest period of the input string for each input. Two consecutive output are separated by a blank line. Sample Input 1 HoHoHo Sample Output 2 */ #include<stdio.h> #include<string.h> int main() { int n; char a[100]; int i,j,k,p,q; scanf("%d",&n); while(n--) { int m=1; memset(a,0,sizeof(a)); scanf("%s",a); for(i=1;i<strlen(a);i++) { p=1; q=0; if(a[0]==a[i]&&strlen(a)%i==0) { for(j=0;j<i&&p;j++) for(k=1;k*i+j<strlen(a)&&p;k++) if(a[j]!=a[j+k*i]) {p=0;} else p=1; q=1; } if(p&&q) {printf("%d\n",i);m=0;break;} } if(m) printf("%d\n",strlen(a)); if(n!=0) printf("\n"); } //printf("~"); return 0; } //莫名奇妙的wa,不知道为什么,过了我自己的很多样例。 /*已AC,因为原题说 Output An integer denoting the smallest period of the input string for each input. Two consecutive output are separated by a blank line. 输出数据之间用用一个空行分开。 我没分开,它说是 WA而不是PE所以还是如入门经典说的好,一些格式错误它把规到WA一类了。 这题要注意以下易错的地方: 当aaaaaaaaaa为数据,周期是1; 当一个数据没周期eg:aaaabbbb,周期输出为它字符串的长度,(由题意得出来的) 和空格问题一样,最后一行数据就不需再输出一个空行了(即输出了两个\n),直接输出一个\n就好,试过了,否则又算WA。 */