- #include <iostream> 
- using namespace std; 
-   
- int main() { 
- 	int n; 
-   cin >> n; 
-   int j=0; 
-   while( n>(1.2) ) 
-   { 
-      n--; 
-      j++; 
-   } 
-   cout << j << endl; 
- 	return 0; 
- } 
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