[백준] 16395 파스칼의 삼각형 - Dynamic Programming / Java

• 문제 링크

16395번: 파스칼의 삼각형

 

• 풀이 과정

 

• 풀이 코드

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.StringTokenizer;

public class Main {

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
        StringTokenizer st = new StringTokenizer(br.readLine());

        int n = Integer.parseInt(st.nextToken());
        int k = Integer.parseInt(st.nextToken());

        int[][] dp = new int[n + 1][n + 1];

        dp[1][1] = 1;
        for (int i = 2; i <= n; i++) {
            for (int j = 1; j <= i; j++)
                dp[i][j] = dp[i - 1][j - 1] + dp[i - 1][j];
        }

        bw.write(String.valueOf(dp[n][k]));
        bw.flush();
    }

}