纯模拟过的。地址: http://acm.pku.edu.cn/JudgeOnline/problem?id=2041
#include "string.h"
#include "stdio.h"
char s[26];
char q[7];
void A(char str[],int len)
  {
int i;
char temp;
for(i=len-1;i>len-1-i;i--)
 {
temp=str[i];
str[i]=str[len-1-i];
str[len-1-i]=temp;
}
}
void C(char str[],int len)
  {
int i;
char temp;
temp=str[0];
for(i=0;i<len-1;i++)str[i]=str[i+1];
str[i]=temp;
}
void J(char str[],int len)
  {
int i;
char temp;
temp=str[len-1];
for(i=len-1;i>0;i--)str[i]=str[i-1];
str[i]=temp;
}
void E(char str[],int len)
  {
int i;
char temp;
if(len%2)
 {
for(i=0;i<len/2;i++)
 {
temp=str[i];
str[i]=str[i+len/2+1];
str[i+len/2+1]=temp;
}
}
else
 {
for(i=0;i<len/2;i++)
 {
temp=str[i];
str[i]=str[i+len/2];
str[i+len/2]=temp;
}
}
}
void P(char str[],int len)
  {
int i;
for(i=0;i<len;i++)
 {
if(str[i]>47&&str[i]<58)
 {
str[i]-=1;
if(str[i]<=47)str[i]=57;
}
}
}
void M(char str[],int len)
  {
int i;
for(i=0;i<len;i++)
 {
if(str[i]>47&&str[i]<58)
 {
str[i]+=1;
if(str[i]>=58)str[i]=48;
}
}
}
void f(char ch,char str[],int len)
  {
if(ch=='A')A(str,len);
if(ch=='C')C(str,len);
if(ch=='E')E(str,len);
if(ch=='J')J(str,len);
if(ch=='M')M(str,len);
if(ch=='P')P(str,len);
}
int main()
  {
int n,i;
int slen,qlen;
scanf("%d",&n);
while(n>0)
 {
scanf("%s%s",&q,&s);
slen=strlen(s);
qlen=strlen(q);
for(i=qlen-1;i>=0;i--)f(q[i],s,slen);
printf("%s\n",s);
n--;
}
return 0;
}

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