[20250827] BOJ / G3 / 마라톤 2 / 이종환

0224LJH/202508/27 BOJ 마라톤 2.md

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+```java
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.StringTokenizer;
+
+
+public class Main {
+
+	static int checkCnt, skipMaxCnt,ans;
+	static int[][] dp; //dp[i][j] skip j번하고 i번째 체크포인트에 도달했을 때의 최댓값
+	static int[] y;
+	static int[] x;
+
+	public static void main(String[] args) throws IOException {
+		init();
+		process();
+		print();
+	}
+
+	public static void init() throws IOException {
+		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+		StringTokenizer st = new StringTokenizer(br.readLine());
+
+		checkCnt = Integer.parseInt(st.nextToken());
+		skipMaxCnt = Integer.parseInt(st.nextToken());
+		dp = new int[checkCnt][skipMaxCnt+1];
+		y = new int[checkCnt];
+		x = new int[checkCnt];
+
+		for (int i = 0; i < checkCnt; i++) {
+			st = new StringTokenizer(br.readLine());
+			y[i] = Integer.parseInt(st.nextToken());
+			x[i] = Integer.parseInt(st.nextToken());
+
+			Arrays.fill( dp[i], Integer.MAX_VALUE/2);
+		}
+
+
+		dp[0][0] = 0;
+		ans = Integer.MAX_VALUE/2;
+	}
+
+	public static void process() throws IOException {
+		for (int i = 0; i < checkCnt; i++) {
+			int curY = y[i];
+			int curX = x[i];
+			for (int j = 0; j <=skipMaxCnt; j++) { // 이전에 스킵했던 횟수
+				for (int k = 0; k <= skipMaxCnt; k++) { // 이번에 스킵하려는 횟수
+					int nIdx = i+1+k;
+					int nSkipCnt = j + k;
+
+					if (nIdx >= checkCnt || nSkipCnt > skipMaxCnt) break;
+
+					int nY = y[nIdx];
+					int nX = x[nIdx];
+					int plus = Math.abs(curX- nX) + Math.abs(curY - nY);
+
+					dp[nIdx][nSkipCnt] = Math.min(dp[nIdx][nSkipCnt], dp[i][j] + plus);
+				}
+
+
+
+			}
+		}
+
+		for (int i = 0; i <= skipMaxCnt; i++) {
+
+			ans = Math.min(dp[checkCnt-1][i], ans);
+		}
+
+	}
+
+
+
+	public static void print() {
+		System.out.println(ans);
+	}
+}
+
+```