hdu1048 The Hardest Problem Ever

题目

#include<stdio.h>#include<string.h>int main()  {  int i;char en_s[]="START";char en_e[]="END";char end[]="ENDOFINPUT";char a[1000];for(;;){gets(a);if(strcmp(en_s,a)==0)continue;if(strcmp(en_e,a)==0)continue;if(strcmp(end,a)==0)break;for(i=0;a[i]!='\0';i++){if(a[i]>='A'&&a[i]<='E')a[i]=a[i]+21;else if(a[i]>='F'&&a[i]<='Z')a[i]=a[i]-5;}puts(a);}    return 0;  }