zoj 1808 Immediate Decodability

#include<stdio.h>#include<string.h>int main(){    char str[9][11], len[8], cas = 0;    while(gets(str[0]))       {        len[0] = strlen(str[0]);        int l = 1;        while(gets(str[l]))   { if(str[l][0] == '9')      break; len[l++] = strlen(str[l]);        }        bool nimm = false;        for(int i = 0; i < l; i++)   { for(int j = 0; j < l; j++)          {     if(j == i || len[i] > len[j])  continue;     int k = 0;     for(; str[i][k]; k++)      {         if(str[i][k] != str[j][k])         break;     }     if(!str[i][k])      {         nimm = true;         break;     } } if(nimm)      break;        }        if(!nimm) printf("Set %d is immediately decodablen", ++cas);        else printf("Set %d is not immediately decodablen", ++cas);    }    return 0;}