Submission #993902

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Source Code Expand

#include"bits/stdc++.h"
using namespace std;

//define
#define ALL(a) a.begin(),a.end()
#define REP(i,n) for(int i=0;i<n;i++)
#define RREP(i,n) for(int i=n-1;i>=0;i--)
#define debug(x) if(1)cout<<#x<<":"<<x<<endl;
#define DEBUG(x) if(1)cout<<#x<<":"<<x<<endl;
#define ll long long

//typedef
typedef vector<int> vi;
typedef vector<vector<int>> vvi;

int main(){
	int n,a;
	cin >> n>>a;
	int sum = 0;
	int b = a ;
	for (;;) {
		if (n <=a+b+1) {
			break;
		}
		sum += b;
		sum += a;
		n = n / (b) + ((n%b) >= 1);
	}
	cout << sum+n << endl;


}

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