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- #include<iostream>
- #include <string.h>
- using namespace std;
- int main(){
- string str;
- int i=0,j=0,k=0;
- getline(cin,str);
- int len = str.length();
- char A[len];
- char B[len];
- strcpy(A,str.c_str());
- for (i = 0; i < len; i++)
- {
- for (j = 0; j < k; j++)
- {
- if (A[i] == B[j])
- break;
- }
- if (j == k)
- {
- B[k] = A[i+2];
- k++;
- i++;
- }
- else {
- B[k]=A[i];
- }
- }
- for (int i=0;i<k;i++){
- cout << B[i] <<endl;
- }
- }
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