【寒假作业】【NOIP2012】Vigenère密码

水题略过。。

// <vigenere.cpp> - 02/10/16 15:47:00
// This file is created by XuYike's black technology automatically.
// Copyright (C) 2015 ChangJun High School, Inc.
// I don't know what this program is.

#include <iostream>
#include <vector>
#include <algorithm>
#include <cstring>
#include <cstdio>
#include <cmath>
using namespace std;
string k,s;
int main(){
	freopen("vigenere.in","r",stdin);
	freopen("vigenere.out","w",stdout);
	getline(cin,k);getline(cin,s);
	int lk=k.size(),ls=s.size();
	for(int i=0;i<lk;i++)if(k[i]>='a')k[i]-='a';else k[i]-='A';
	for(int i=0;i<ls;i++){
		if(s[i]>='a')putchar(char((s[i]-'a'-k[i%lk]+26)%26+'a'));
		else putchar(char((s[i]-'A'-k[i%lk]+26)%26+'A'));
	}
	return 0;
}

// <vigenere.cpp> - 02/10/16 15:47:00

// This file is created by XuYike's black technology automatically.

// I don't know what this program is.

#include <iostream>

#include <vector>

#include <algorithm>

#include <cstring>

#include <cstdio>

#include <cmath>

using namespace std;

string k,s;

int main(){

freopen("vigenere.in","r",stdin);

freopen("vigenere.out","w",stdout);

getline(cin,k);getline(cin,s);

int lk=k.size(),ls=s.size();

for(int i=0;i<lk;i++)if(k[i]>='a')k[i]-='a';else k[i]-='A';

for(int i=0;i<ls;i++){

if(s[i]>='a')putchar(char((s[i]-'a'-k[i%lk]+26)%26+'a'));

else putchar(char((s[i]-'A'-k[i%lk]+26)%26+'A'));

}

return 0;

}