aaaicu

문제 : https://www.acmicpc.net/problem/1149

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        int[][] street = new int[n][3];
        int d[][] = new int[n][3];

        for (int i = 0; i < n; i++) {
            for (int j = 0; j < 3; j++) {
                street[i][j] = scan.nextInt();
            }
        }
        // 입력부
        for (int j = 0; j < n; j++) {
            for (int i = 0; i < 3; i++) {
                if (j == 0) {
                    d[j][i] = street[j][i];
//                    System.out.print(d[j][i] + " ");
                } else {

                    d[j][i] = Math.min(d[j - 1][(i + 1) % 3], d[j - 1][(i + 2) % 3]) + street[j][i];
//                    System.out.print(d[j][i] + " ");
                }
            }
//            System.out.println();
        }

//        for (int a : d[n - 1]) {
//            System.out.println(a);
//        }
        System.out.println(Math.min(d[n-1][0],Math.min(d[n-1][1], d[n-1][2])));

        scan.close();
    }

}