Go: package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

func main() {
	io := NewIo()
	defer io.Flush()
	for {
		n := io.NextInt()
		if n == 0 {
			break
		}
		k := make([]int, n)
		for i := 0; i < n; i++ {
			k[i] = io.NextInt()
		}
		const st = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
		s := io.NextLine()
		for i, cnt := 0, 0; i < len(s); i, cnt = i+1, (cnt+1)%n {
			idx := strings.IndexRune(st, rune(s[i]))
			c := st[(idx-k[cnt]+52)%52]
			io.Printf("%c", c)
		}
		io.Println()
	}
}

// I/O template
type Io struct {
	reader    *bufio.Reader
	writer    *bufio.Writer
	tokens    []string
	nextToken int
}

func NewIo() *Io {
	return &Io{
		reader: bufio.NewReader(os.Stdin),
		writer: bufio.NewWriter(os.Stdout),
	}
}

func (io *Io) Flush() {
	err := io.writer.Flush()
	if err != nil {
		panic(err)
	}
}

func (io *Io) NextLine() string {
	var buff []byte
	for {
		line, isPrefix, err := io.reader.ReadLine()
		if err != nil {
			panic(err)
		}
		buff = append(buff, line...)
		if !isPrefix {
			break
		}
	}
	return string(buff)
}

func (io *Io) Next() string {
	for io.nextToken >= len(io.tokens) {
		line := io.NextLine()
		io.tokens = strings.Fields(line)
		io.nextToken = 0
	}
	s := io.tokens[io.nextToken]
	io.nextToken++
	return s
}

func (io *Io) NextInt() int {
	i, err := strconv.Atoi(io.Next())
	if err != nil {
		panic(err)
	}
	return i
}

func (io *Io) NextFloat() float64 {
	i, err := strconv.ParseFloat(io.Next(), 64)
	if err != nil {
		panic(err)
	}
	return i
}

func (io *Io) Println(a ...interface{}) {
	fmt.Fprintln(io.writer, a...)
}

func (io *Io) Printf(format string, a ...interface{}) {
	fmt.Fprintf(io.writer, format, a...)
}

func (io *Io) PrintIntSlice(a []int) {
	b := make([]interface{}, 0, len(a))
	for _, x := range a {
		b = append(b, x)
	}
	io.Println(b...)
}

func (io *Io) PrintStringSlice(a []string) {
	b := make([]interface{}, 0, len(a))
	for _, x := range a {
		b = append(b, x)
	}
	io.Println(b...)
}

func Log(name string, value interface{}) {
	fmt.Fprintf(os.Stderr, "%s=%+v\n", name, value)
}

func ExampleIo() {
	io := NewIo()
	defer io.Flush()
	a := make([]int, 0, 3)
	a[0], a[1], a[2] = io.NextInt(), io.NextInt(), io.NextInt()
	io.Println(a)
	io.PrintIntSlice(a)
	Log("io", a)
}

C++: #include <iostream>
#include <cstdlib>
#include <string>
using namespace std;
#define N 100

int main(){
        int i=0, key[N], count=0;
        string keymoji;

        cin >> i;
        while(i != 0){
                for(int j=0; j<i; j++){
                        cin >> keymoji;
                        if(keymoji.size() == 2){
                                key[j] = (keymoji[0]-'0')*10+keymoji[1]-'0';
                        }else{
                                key[j] = (keymoji[0]-'0');
                        }
                }
                //for(int j=0; j<i; j++){
                //      key[j] = keymoji[j*2]-'0';
                //}
                string eki;
                cin >> eki;
                for(int j=0; j<eki.size(); j++){
                        if(eki[j] <= 'Z'){
                                eki[j] -= key[j%i];
                                if(eki[j] < 'A'){
                                        eki[j] = 'z'+1-('A'-eki[j]);
                                        if(eki[j] < 'a'){
                                                eki[j] = 'Z'+1-('a'-eki[j]);
                                        }
                                }
                        }else{
                                if(eki[j]-key[j%i] < 'a'){
                                        eki[j] -= key[j%i]+('a'-'Z'-1);
                                        if(eki[j] < 'A'){
                                                eki[j] += 'z'-'A'+1;
                                        }
                                }else{
                                        eki[j] -= key[j%i];
                                }
                        }
                }
                cout << eki << endl;
                cin >> i;
        }
}

C++: #include <iostream>
#include <algorithm>
#include <string>
#include <cctype>

using namespace std;

char conv(int c){ return c < 26 ? 'a' + c : 'A' + c - 26; }

main(){
  int n, k[100];
  string s;
  while(cin >> n && n){
    for(int i=0;i<n;i++) cin >> k[i];
    cin >> s;
    for(int i=0;i<s.size();i++){
      if(islower(s[i])) cout << conv((s[i] - 'a' - k[i%n] + 52) % 52);
      else cout << conv((s[i] - 'A' - k[i%n] + 26 + 52) % 52);
    }
    cout << endl;
  }
}

C++: #include <bits/stdc++.h>
using namespace std;
int key[101];

int main(){
  int n;
  while(cin>>n,n){
    for(int i=0;i<n;i++) cin>> key[i];
    string str;
  cin>>str;
  int idx=0;
  for(int i=0;i<str.size();i++){
    idx%=n;
    int t=key[idx++]%26;
    str[i]-=t;
    if(str[i]<'A') str[i]='z'-('A'-str[i]-1);
    else if('a'<=str[i]+t&&str[i]<'a') str[i]='Z'-('a'-str[i]-1);
    
  }
  cout <<str<<endl;
  }
  return 0;
}

C++: /*
Hokudai Practice Contest 2014
A - King's Inspection

ティツァツ」テヲツウツ陛ッツシツ堙」ツつキテ」ツδ淌」ツδ・テ」ツδャテ」ツδシテ」ツつキテ」ツδァテ」ツδウ
テヲツ崢クテ」ツ?凝」ツつ古」ツ?ヲテ」ツ??」ツつ凝」ツδォテ」ツδシテ」ツδォテ」ツ?ォテ・ツセツ禿」ツ?」テ」ツ?ヲテ・ツセツゥテ・ツ?ε」ツ?凖」ツつ凝」ツ??」ツ?妥」ツ??
テ」ツδォテ」ツδシテ」ツδォテ」ツつ津・ツ?催ァツ渉セテ」ツ?凖」ツつ凝」ツ?淌」ツつ?」ツ?ォテ」ツ?ッテ」ツδェテ」ツつケテ」ツδ暗」ツ?ョテ・ツセツェテァツ陳ーテ」ツつ?ヲツ鳴?・ツュツ療」ツ?ョテ・ツセツェテァツ陳ーテ」ツつ津・ツ?催ァツ渉セテ」ツ?凖」ツつ凝・ツソツ?ィツヲツ?」ツ?古」ツ?づ」ツつ凝」ツ??
(M-1)+1 -> 0, 0-1 -> (M-1)テ」ツ??」ツ?ィテ」ツ?ェテ」ツつ凝」ツつ暗」ツ??」ツ?ォテ」ツ?凖」ツつ凝」ツ?ォテ」ツ?ッテ」ツ??・ツ可ーテ、ツスツ?%)テ」ツつ津ァツ板ィテ」ツ??」ツつ古」ツ?ーテ」ツつ暗」ツ??」ツ??

テヲツ卍づゥツ鳴禿ィツィツ暗ァツョツ療ゥツ?湘ッツシツ唹(|s|)
テァツゥツコテゥツ鳴禿ィツィツ暗ァツョツ療ゥツ?湘ッツシツ唹(n + |s|)
*/

#include<iostream>
#include<cctype>
using namespace std;

//a-zA-z -> テゥツ??ァツ閉ェ
int toInt(char a){
  if(islower(a))return a-'a';
  return a-'A'+26;
}

//テゥツ??ァツ閉ェ -> a-zA-Z
char toChar(int a){
  if(a<26)return 'a'+a;
  return 'A'+a-26;
}

//テゥツァツ?ヲツ閉ー
const int M = 52;

int main(){
  int n,k[100];
  string s;

  while(cin >> n,n){
    for(int i=0;i<n;i++)cin >> k[i];
    cin >> s;

    for(int i=0;i<(int)s.size();i++){
      //テ・ツセツェテァツ陳ーテ」ツつ津」ツつキテ」ツδ淌」ツδ・テ」ツδャテ」ツδシテ」ツつキテ」ツδァテ」ツδウテ」ツ?凖」ツつ凝」ツ?ォテ」ツ?ッmodテ」ツつ津、ツスツソテ」ツ?暗」ツ?ーティツ可ッテ」ツ??
      int tmp = toInt(s[i]) - k[i%n];
      //ティツイツ?ヲツ閉ーテ」ツつづ」ツ?づ」ツつ甘・ツセツ療」ツつ凝・ツ?エテ・ツ青暗」ツ?ョテ・ツョツ嘉・ツ?ィテ」ツ?ェmodテ」ツ?ョテ・ツ渉姪」ツつ甘ヲツ鳴ケテ」ツ?ッ((x%mod) + mod)%mod
      tmp = ((tmp%M) + M) % M;
      cout << toChar(tmp);
    }
    cout << endl;
  }
}

C++: #include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<(n);i++)
typedef long long ll;
int main(){
	char data[53];
	for(int i=0;i<26;i++){
		data[i]='A'+i;data[i+26]='a'+i;
	}
	int n,k;
	string s;
	while(cin>>n,n){
		int k[n];
		for(int i=0;i<n;i++)cin>>k[i];
		cin>>s;
		int a[n];
		for(int i=0;i<s.size();i++){
			if(s[i]>='a')a[i]=26+(s[i]-'a');
			else a[i]=s[i]-'A';
			int t=a[i]-k[i%n];
			if(t<0)t+=52;
			cout<<data[t];
		}
		cout<<endl;
	}
}

C++: #include<iostream>
#include<string>
#include<vector>
using namespace std;
int main(){
  int n;
  while(cin >> n,n){
    int k[n];
    for(int i=0;i<n;i++) cin >> k[i];
    string s;
    cin >> s;
    int j=0;
    for(int i=0;i<s.size();i++){
      if(j==n)j=0;
      s[i]-=k[j];
      if(s[i]<65)s[i]+=58;
      if(s[i]>91&&s[i]<97)s[i]-=6;
      j++;
    }
  cout << s << endl;
  }
}