【HDOJ6684】Rikka with Game（博弈）

题意：有一个由小写字母组成的字符串，A和B两个人轮流操作，A想让序列的字典序最大，B想最小

两人都能任意选择一位上的字母将其右移一位（a->b，b->c……z->a）或者直接结束游戏

A先手操作，问最后的序列

n<=1e2

思路：

 #include<bits/stdc++.h>
 using namespace std;
 typedef long long ll;
 typedef unsigned int uint;
 typedef unsigned long long ull;
 typedef pair<int,int> PII;
 typedef pair<ll,ll> Pll;
 typedef vector<int> VI;
 typedef vector<PII> VII;
 #define N  310000
 #define M  4100000
 #define fi first
 #define se second
 #define MP make_pair
 #define pi acos(-1)
 #define mem(a,b) memset(a,b,sizeof(a))
 #define rep(i,a,b) for(int i=(int)a;i<=(int)b;i++)
 #define per(i,a,b) for(int i=(int)a;i>=(int)b;i--)
 #define lowbit(x) x&(-x)
 #define Rand (rand()*(1<<16)+rand())
 #define id(x) ((x)<=B?(x):m-n/(x)+1)
 #define ls p<<1
 #define rs p<<1|1

 const ll MOD=1e9+,inv2=(MOD+)/;
       double eps=1e-;
       int INF=1e9;
       int da[]={-,,,};
       int db[]={,,-,};

       char ch[N];

 int read()
 {
    int v=,f=;
    char c=getchar();
    while(c<||<c) {if(c=='-') f=-; c=getchar();}
    while(<=c&&c<=) v=(v<<)+v+v+c-,c=getchar();
    return v*f;
 }

 int main()
 {
     //freopen("1.in","r",stdin);
     //freopen("1.out","w",stdout);

     int cas;
     scanf("%d",&cas);

     while(cas--)
     {
         scanf("%s",ch+);
         int n=strlen(ch+);
         rep(i,,n)
         {
             if(ch[i]=='y') continue;
             if(ch[i]=='z') ch[i]='b';
             break;
         }
         rep(i,,n) printf("%c",ch[i]);
         printf("\n");
     }

     return ;
 }