#include
int code(int in);//加密
int decode(int in);//解密
int main ()
{
int in;
scanf("%d",&in);
int result = code(in);
printf("加密:%d\n",result);
printf("解密:%d\n",decode(result));
return 0;
}
int code(int in)
{
int result;
int m[4];
int n,i;
for (i=0;i<4;i++)
{
m[i] = in%10;
m[i] += 5;
m[i] %= 10;
in /= 10;
}
n = m[0];
m[0] = m[3];
m[3] = n;
n = m[1];
m[1] = m[2];
m[2] = n;
result = m[0]+m[1]*10+m[2]*100+m[3]*1000;
return result;
}
int decode(int in)
{
int result;
int m[4];
int n,i;
for (i=0;i<4;i++)
{
m[i] = in%10;
m[i] = (m[i]>=5 ? m[i]-5:m[i]+5);
in /= 10;
}
n = m[0];
m[0] = m[3];
m[3] = n;
n = m[1];
m[1] = m[2];
m[2] = n;
result = m[0]+m[1]*10+m[2]*100+m[3]*1000;
return result;
}
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