Recheck how to handle strings (or arrays corresponding to them) before implementing.

This problem can be solved by the following two steps.

• Find the last occurrence of . in the given string.
• Print the substring coming after that ..

Both of them can be realized with a for loop and some variables.

The implementation is even simplified if you know how to obtain the length of a string.

Sample code (C++):

#include<bits/stdc++.h>

using namespace std;

int main(){
  string s;
  cin >> s;
  int l=s.size(),ldot=0;
  for(int i=0;i<l;i++){
    if(s[i]=='.'){ldot=i;}
  }
  for(int i=ldot+1;i<l;i++){
    cout << s[i];
  }
  cout << "\n";
  return 0;
}