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- #include <iostream>
- #include <algorithm>
- using namespace std;
- int main()
- {
- string input;
- cin>>input;
- string made=input.substr(0,1);
- bool at=false;
- for(int i=1;i<input.length();)
- {
- if(input.substr(i,3)=="dot"&&i+3!=input.length())
- {
- made=made+".";
- i+=3;
- }
- else if(input.substr(i,2)=="at"&&at==false&&i+2!=input.length())
- {
- at=true;
- made=made+"@";
- i+=2;
- }
- else
- {
- made=made+input.substr(i,1);
- i++;
- }
- }
- cout<<made<<endl;
- return 0;
- }
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