#include<stdcpp.h>
using namespace std;
class Solution{
    public:
    int numberOfMatches(int n){
        int sum = 0;
        while(n!=1){
            sum+=n/2;
            if(n%2) n+=1;
            n/=2;
        }
        return sum;
    }
};

int main(){
    Solution sol;
    int n;
    n = 7;
    cout<<sol.numberOfMatches(n)<<endl;
    n = 14;
    cout<<sol.numberOfMatches(n)<<endl;
    return 0;
}