#include <stdio.h>
#include <string.h> 
int main ()
{
	char arr[100]={0};
	int n,i;
	scanf ("%d",&n);
	while (n>=26)
	n -= 26;
	getchar();
	gets(arr);
	for (i = 0;arr[i]!='\0';i++)
	{
	  if (arr[i]+n>'z')
	  arr[i] = 'a'+(arr[i]+n-'z'-1);
	  else
	   arr[i] += n;
	}
	printf ("%s",arr);
	return 0;
}

我哭了_(:з」∠)_ 求好心大佬帮帮忙