Intergersthatsumtothesamevalue_START57D.cpp

#include <iostream>
using namespace std;

int main() {
	int n,flag= 0;
	cin >> n;
	for(int i =1 ;i<=n;i++){
	    for(int j =1;j<=n;j++){
	        if(i+j==n) flag++;        
	    }
	}
	cout << flag;
	return 0;
}