Promblem—— B. Long Number ——Codefordes-白红宇

Promblem—— B. Long Number ——Codefordes

阅读量：289 次

发布时间：2019-03-01

本文共 1862 字，大约阅读时间需要 6 分钟。

B. Long Number

time limit per test2 seconds

memory limit per test256 megabytes

inputstandard input

outputstandard output

You are given a long decimal number a consisting of n digits from 1 to 9. You also have a function f that maps every digit from 1 to 9 to some (possibly the same) digit from 1 to 9.

You can perform the following operation no more than once: choose a non-empty contiguous subsegment of digits in a, and replace each digit x from this segment with f(x). For example, if a=1337, f(1)=1, f(3)=5, f(7)=3, and you choose the segment consisting of three rightmost digits, you get 1553 as the result.

What is the maximum possible number you can obtain applying this operation no more than once?

Input

The first line contains one integer n (1≤n≤2⋅105) — the number of digits in a.

The second line contains a string of n characters, denoting the number a. Each character is a decimal digit from 1 to 9.

The third line contains exactly 9 integers f(1), f(2), …, f(9) (1≤f(i)≤9).

Output

Print the maximum number you can get after applying the operation described in the statement no more than once.

Examples

input

1337

1 2 5 4 6 6 3 1 9

output

1557

input

11111

9 8 7 6 5 4 3 2 1

output

99999

input

1 1 1 1 1 1 1 1 1

output

思路：

原本以为只是一道映射题，结果发现是要把原本的数变大，并且映射一旦使用那么一旦下一个数不能大于映射的数，那么映射暂停，输出结果。

代码：

#include
   
    #include 
    
     #include
     
      #include
      
       #include
       
        #include
        
         #include
         
          #include
          
           #include
           
            #include
            
             #include
             
              #include
              
               #include
               #define ll long long#define dd double#define mes(x,y) memset(x,y,sizeof(y))using namespace std;int main(){ ll n;string s; while(cin>>n>>s){ int a[15]; for(int i=1;i<=9;i++)cin>>a[i]; for(ll i=0;i
                
                 s[i]){ //找到开始映射的位置，开始暴力 for(int j=i;j
                 
                  =s[j]){ s[j]=a[s[j]-'0']+'0'; }//在映射中可以有相同的存在，最外面的判断不加相等是因为那个位置没有改变的必要，然而里面加等于是为了映射次数更多，是这个数变的更大 else{ break; } } break; } } cout<
                  <

转载地址：http://grvo.baihongyu.com/

你可能感兴趣的文章

nessus快速安装使用指南（非常详细）零基础入门到精通，收藏这一篇就够了