644 - Immediate Decodability未通过

//未通过！ #include <stdio.h> #include <string.h> char codes[10][15]; int n; int check(int j) { for(int i=j+1;i<n;i++) { int k; for(k=0;codes[i][k] && codes[j][k]==codes[i][k];k++); if(codes[i][k]=='\0') return 1; } return 0; } int main() { int cas=0; n=0; while(scanf("%s",codes[n])&&strcmp(codes[n],"9")) { n++; cas++; while(scanf("%s",codes[n])&&strcmp(codes[n],"9")) { n++; } int i; for(i=0;i<n-1;i++) { if(check(i)) { printf("Set %d is not immediately decodable\n",cas); break; } } if(i==n-1) printf("Set %d is immediately decodable\n",cas); } return 0; }