[CF709C] Letters Cyclic Shift（暴力）

题目链接：http://codeforces.com/contest/709/problem/C

题意：给一个字符串，选中一个连续区间修改，修改是将区间内字符顺时针转。问如何修改使得字符串字典序最小。

选中第一个非a的字符和第二个a字符之前作为区间修改即可。

/*
━━━━━┒ギリギリ♂ eye！
┓┏┓┏┓┃キリキリ♂ mind！
┛┗┛┗┛┃＼○／
┓┏┓┏┓┃ /
┛┗┛┗┛┃ノ)
┓┏┓┏┓┃
┛┗┛┗┛┃
┓┏┓┏┓┃
┛┗┛┗┛┃
┓┏┓┏┓┃
┛┗┛┗┛┃
┓┏┓┏┓┃
┃┃┃┃┃┃
┻┻┻┻┻┻
*/
#include <algorithm>
#include <iostream>
#include <iomanip>
#include <cstring>
#include <climits>
#include <complex>
#include <fstream>
#include <cassert>
#include <cstdio>
#include <bitset>
#include <vector>
#include <deque>
#include <queue>
#include <stack>
#include <ctime>
#include <set>
#include <map>
#include <cmath>
using namespace std;
#define fr first
#define sc second
#define cl clear
#define BUG puts("here!!!")
#define W(a) while(a--)
#define pb(a) push_back(a)
#define Rint(a) scanf("%d", &a)
#define Rs(a) scanf("%s", a)
#define Cin(a) cin >> a
#define FRead() freopen("in", "r", stdin)
#define FWrite() freopen("out", "w", stdout)
#define Rep(i, len) for(int i = 0; i < (len); i++)
#define For(i, a, len) for(int i = (a); i < (len); i++)
#define Cls(a) memset((a), 0, sizeof(a))
#define Clr(a, x) memset((a), (x), sizeof(a))
#define Full(a) memset((a), 0x7f7f7f, sizeof(a))
#define lrt rt << 1
#define rrt rt << 1 | 1
#define pi 3.14159265359
#define RT return
#define lowbit(x) x & (-x)
#define onecnt(x) __builtin_popcount(x)
typedef long long LL;
typedef long double LD;
typedef unsigned long long ULL;
typedef pair<int, int> pii;
typedef pair<string, int> psi;
typedef pair<LL, LL> pll;
typedef map<string, int> msi;
typedef vector<int> vi;
typedef vector<LL> vl;
typedef vector<vl> vvl;
typedef vector<bool> vb;

const int maxn = 100100;
char s[maxn];
int n;

void convert(int x, int y) {
for(int i = x; i < y; i++) {
if(s[i] == 'a') s[i] = 'z';
else s[i]--;
}
}

int main() {
// FRead();
while(~Rs(s)) {
n = strlen(s);
bool ok = 0;
int ss = 0x7f7f7f, tt = n;
Rep(i, n) {
if(s[i] != 'a') {
ss = i;
break;
}
}
for(int i = ss+1; i < n; i++) {
if(s[i] == 'a') {
tt = i;
break;
}
}
if(ss == 0x7f7f7f) {
s[n-1] = 'z';
}
else {
convert(ss, tt);
}
printf("%s\n", s);
}

RT 0;
}