Pasha got a very beautiful string s for his birthday, the string consists of lowercase Latin letters. The letters in the string are numbered from 1 to |s| from left to right, where |s| is the length of the given string.
Pasha didn't like his present very much so he decided to change it. After his birthday Pasha spent m days performing the following transformations on his string — each day he chose integer ai and reversed a piece of string (a segment) from position ai to position |s| - ai + 1. It is guaranteed that 2·ai ≤ |s|.
You face the following task: determine what Pasha's string will look like after m days.
The first line of the input contains Pasha's string s of length from 2 to 2·105 characters, consisting of lowercase Latin letters.
The second line contains a single integer m (1 ≤ m ≤ 105) — the number of days when Pasha changed his string.
The third line contains m space-separated elements ai (1 ≤ ai; 2·ai ≤ |s|) — the position from which Pasha started transforming the string on the i-th day.
In the first line of the output print what Pasha's string s will look like after m days.
abcdef
1
2
aedcbf
vwxyz
2
2 2
vwxyz
abcdef
3
1 2 3
fbdcea
翻转的子串是中心对称的。
1 #include <iostream> 2 #include <cstdio> 3 #include <cstring> 4 #include <cmath> 5 #include <algorithm> 6 #include <string> 7 #include <vector> 8 #include <set> 9 #include <map> 10 #include <queue> 11 #include <stack> 12 #include <sstream> 13 #include <iomanip> 14 using namespace std; 15 const int INF=0x4fffffff; 16 const int EXP=1e-6; 17 const int MS=100005; 18 19 char str[2*MS]; 20 int n; 21 int flag[MS]; 22 23 int main() 24 { 25 scanf("%s",str); 26 scanf("%d",&n); 27 memset(flag,0,sizeof(flag)); 28 int len=strlen(str); 29 int x; 30 for(int i=0;i<n;i++) 31 { 32 scanf("%d",&x); 33 flag[x-1]++; 34 } 35 for(int i=1;i<len/2;i++) 36 flag[i]+=flag[i-1]; 37 for(int i=0;i<len/2;i++) 38 { 39 if(flag[i]%2==0) 40 continue; 41 else 42 { 43 char c=str[i]; 44 str[i]=str[len-1-i]; 45 str[len-1-i]=c; 46 } 47 } 48 printf("%s ",str); 49 return 0; 50 }