A. Tennis Tournament

题目连接：

http://www.codeforces.com/contest/628/problem/A

Description

A tennis tournament with n participants is running. The participants are playing by an olympic system, so the winners move on and the losers drop out.

The tournament takes place in the following way (below, m is the number of the participants of the current round):

let k be the maximal power of the number 2 such that k ≤ m,

k participants compete in the current round and a half of them passes to the next round, the other m - k participants pass to the next round directly,

when only one participant remains, the tournament finishes.

Each match requires b bottles of water for each participant and one bottle for the judge. Besides p towels are given to each participant for the whole tournament.

Find the number of bottles and towels needed for the tournament.

Note that it's a tennis tournament so in each match two participants compete (one of them will win and the other will lose).

Input

The only line contains three integers n, b, p (1 ≤ n, b, p ≤ 500) — the number of participants and the parameters described in the problem statement.

Output

Print two integers x and y — the number of bottles and towels need for the tournament.

Sample Input

5 2 3

Sample Output

20 15

Hint

题意

有两种水，n个人参加比赛

每次都会选择出小于等于n的最大2的倍数，然后让这些人比赛，每个参加比赛的人可以获得b瓶A水，裁判也得有一瓶A水

然后每个人都会获得p瓶B水

然后问你打完所有比赛后，需要多少瓶A水，多少瓶B水

题解：

A题就不要想太多，直接暴力吧……

虽然O(1)公式也有

代码

#include<bits/stdc++.h>

using namespace std;

vector<int> two;

int main()

{

    long long n,b,p;

    cin>>n>>b>>p;

    long long ans = 0,ans2 = n*p;

    while(n>1)

    {

        int t = (n)/2*2;

        ans+=t*b+t/2;

        n-=t/2;

    }

    cout<<ans<<" "<<ans2<<endl;

}

巴特西

Educational Codeforces Round 8 A. Tennis Tournament 暴力