JOJ ACM 1237

最新推荐文章于 2020-09-23 21:17:29 发布

最新推荐文章于 2020-09-23 21:17:29 发布 · 180 阅读

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1237

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
A single character string of up to 80 non-blank characters.

Output
An integer denoting the smallest period of the input string.

Sample Input

HoHoHoSample Output

2代码:
[code]
#include<stdio.h>
#include<string.h>
int main(){
char str[80];
int len,period,j;
while(scanf("%s",str)!=EOF) {
period=1;
len = strlen(str);
while(period!=len) {
if(len%period!=0) {
period++;
continue;
}
for(j=period;j<len;j++) {
if(str[j]!=str[j%period])
break;
}
if(j==len) {
printf("%d\n",period);
break;
}
period++;
}
if(period==len) {
printf("%d\n",period);
}
}
return 0;
}[/code]