-         #include <iostream> 
-         #include <string> 
-   
-         using namespace std; 
-   
-         int main(){ 
-             string s; 
-             getline(cin, s); 
-             for (int i = 0; i < s.length(); i++) 
-                 if (s[i] == ' ' && s[i + 1] == ' ') {s.erase(i, 1); i = (i - 1);} 
-             cout << s << endl; 
-             return 0; 
-         } 
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