题意: 给定一对用凯撒密码加密的明文和密文,再给你一个密文,让你解密出明文,保证有唯一解. 题解: 对凯撒密码的已知明文攻击,签到题. #include<iostream> using namespace std; ],c2[],c3[]; int t; int main(){ int __; scanf("%d",&__); ;_<=__;_++){ int n,m; scanf("%d %d",&n,&m); scanf…
In cryptography, a Caesar cipher, also known as the shift cipher, is one of the most straightforward and most widely known encryption techniques.It is a type of substitution cipher in which each letter in the plaintext is replaced by a letter some fi…
https://codeforc.es/gym/102222/my 好像在哪里见过这个东西?字符的左右移还是小心,注意在mod26范围内. #include<bits/stdc++.h> using namespace std; typedef long long ll; inline int read() { int x=0; int f=0; char c; do { c=getchar(); if(c=='-') f=1; } while(c<'0'||c>'9'); do…
time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Polycarp loves ciphers. He has invented his own cipher called Right-Left. Right-Left cipher is used for strings. To encrypt the string s=s1s2…
题目链接:https://codeforces.com/contest/1090/problem/M There are n houses along the road where Anya lives, each one is painted in one of k possible colors. Anya likes walking along this road, but she doesn't like when two adjacent houses at the road have…
