UVa455

#include <stdlib.h>
#include <stdio.h>
#include <strings.h>
int main ( int argc, char *argv[] )
{
    char buf[81];
    int i = 0;
    memset(buf,0,sizeof(buf));
    while(scanf("%s",buf)!=EOF){
        for(i=1;i<strlen(buf);i++){
            if ( strlen(buf)%i==0 ){
                if (strncmp(buf,buf+i,strlen(buf)-i)==0) {
                    printf ( " k is %d\n",i );
                    break;
                }
            }
        }
        if(i==strlen(buf)){
            printf ( "k is %d\n",i );
        }
        memset(buf,0,sizeof(buf));
    }
    return EXIT_SUCCESS;