[C++] 4811 - 알약

문제 링크 : https://www.acmicpc.net/problem/4811

4811번: 알약

 

 

#include<bits/stdc++.h>
 
#define endl '\n'
 
using namespace std;
 
unsigned long long dp[35][35];
 
void init()
{
    for(int i = 0; i <= 30; ++i)
        dp[i][0] = 1;
 
    for(int i = 1; i <= 30; ++i)
    {
        for(int j = 0; j <= 31-i; ++j)
        {
            if(j == 0)
                dp[j][i] += dp[j+1][i-1];
            else
                dp[j][i] += dp[j+1][i-1] + dp[j-1][i];
        }
    }
}
 
int main(void)
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
 
    init();
    
    int n;
    while(1)
    {
        cin >> n;
        if(n)
            cout << dp[0][n] << endl;
        else
            break;
    }
 
    return 0;
}