[20250704] BOJ / G4 / 동전 바꿔주기 / 김수연

suyeun84/202507/04 BOJ G4 동전 바꿔주기.md

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+```java
+import java.io.*;
+import java.util.*;
+
+public class boj2624 {
+	static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+	static StringTokenizer st;
+	static void nextLine() throws Exception {st = new StringTokenizer(br.readLine());}
+	static int nextInt() {return Integer.parseInt(st.nextToken());}
+
+	public static void main(String[] args) throws Exception {
+		nextLine();
+		int T = nextInt();
+		nextLine();
+		int k = nextInt();
+		Coin[] coins = new Coin[k+1];
+		int[][] dp = new int[T+1][k+1];
+
+		for (int i = 1; i <= k; i++) {
+			nextLine();
+			int p = nextInt();
+			int n = nextInt();
+			coins[i] = new Coin(p, n);
+		}
+		for (int i = 1; i <= k; i++) {
+            int val = coins[i].val;
+            int cnt = coins[i].cnt;
+            dp[0][i - 1] = 1;
+
+            for (int j = 1; j <= cnt; j++) {
+                for (int z = val * j; z <= T; z++) {
+                    dp[z][i] += dp[z - (val * j)][i - 1];
+                }
+            }
+
+            for (int j = 1; j <= T; j++) {
+                dp[j][i] += dp[j][i - 1];
+            }
+        }
+
+        System.out.println(dp[T][k]);
+	}
+	static class Coin {
+        int val, cnt;
+        Coin(int val, int cnt) {
+            this.val = val;
+            this.cnt = cnt;
+        }
+    }
+}
+```