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  1. //StdIn : 4 abc def fes cba
  2. #include <stdio.h>
  3. #include <iostream>
  4. #include <string>
  5. #include <unordered_map>
  6.  
  7. using namespace std;
  8. #define MAX 100
  9. string reverse(string temp){
  10.     //cout<<" In function "<<temp;
  11.     char pwd[temp.length()];
  12.     int j=0;
  13.     for(int i=(temp.length())-1;i>=0;i--,j++){
  14.         pwd[j]=temp[i];
  15.     }
  16.     pwd[j]='\0';
  17.     string str(pwd);
  18.     return str;
  19. }
  20. int findPassword(string password[],int k){
  21.     string temp;
  22.     char *op;
  23.     unordered_map<string, string> ht;
  24.     for(int i=0;i<k;i++){
  25.         if(password[i].length()%2 == 0 ) {cout<<"error in length" ; return 0 ;}    
  26.         temp=password[i];
  27.         ht.insert(make_pair(temp,reverse(temp)));
  28.         if(ht.find(reverse(temp))!=ht.end()){
  29.             //cout<<temp<< "<=>" <<reverse(temp)<<endl ;
  30.             cout<<password[i].length()<<" "<<temp[(password[i].length())/2];
  31.             return 1;
  32.         }//if
  33.     }//for
  34.     return 0;
  35. }
  36. int main(){
  37.  
  38.     string password[MAX];
  39.     unordered_map<string, string> ht;
  40.  
  41.     int i=0, j=0, k=0, t=0;
  42.     cin>>t;
  43.     k=t;
  44.     while(t){
  45.         cin>>password[i];
  46.         --t; ++i;
  47.     }
  48.     findPassword(password,k);
  49.  
  50. }//main
Success #stdin #stdout 0s 3436KB
comments (?)
stdin 
4 abc def fes cba
stdout 
3 b
https://ideone.com/WqbO5v
Password_Predictor
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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