[20250407] BOJ / G2 / 방문 판매 / 권혁준

Author: oncsr

khj20006/202504/07 BOJ G2 방문 판매.md

@@ -0,0 +1,90 @@
+```java
+
+import java.util.*;
+import java.io.*;
+
+class Main {
+	
+	// IO field
+	static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+	static BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+	static StringTokenizer st = new StringTokenizer("");
+
+	static void nextLine() throws Exception {st = new StringTokenizer(br.readLine());}
+	static String nextToken() throws Exception {
+		while(!st.hasMoreTokens()) nextLine();
+		return st.nextToken();
+	}
+	static int nextInt() throws Exception { return Integer.parseInt(nextToken()); }
+	static long nextLong() throws Exception { return Long.parseLong(nextToken()); }
+	static double nextDouble() throws Exception { return Double.parseDouble(nextToken()); }
+	static void bwEnd() throws Exception {bw.flush();bw.close();}
+	
+	// Additional field
+	
+	static int N, X, Y;
+	static int[] x, y;
+	static int[][] max, rec;
+	
+	static final int INF = -123456;
+	
+	public static void main(String[] args) throws Exception {
+			
+		ready();
+		solve();
+	
+		bwEnd();
+		
+	}
+	
+	static void ready() throws Exception{
+		
+		N = nextInt();
+		X = nextInt();
+		Y = nextInt();
+		x = new int[N];
+		y = new int[N];
+		for(int i=0;i<N;i++) {
+			x[i] = nextInt();
+			y[i] = nextInt();
+		}
+		max = new int[5001][51];
+		rec = new int[5001][51];
+		for(int i=0;i<=5000;i++) {
+			Arrays.fill(max[i], INF);
+			Arrays.fill(rec[i], INF);
+		}
+		
+	}
+	
+	static void solve() throws Exception{
+		
+		max[0][0] = 0;
+		for(int i=0;i<N;i++) {
+			for(int c=i+1;c>0;c--) for(int j=100*(i+1);j>=x[i];j--) if(max[j-x[i]][c-1] != INF) {
+				if(max[j][c] < Y && max[j-x[i]][c-1] + y[i] >= Y) {
+					rec[j][c] = i+1;
+				}
+				max[j][c] = Math.max(max[j][c], max[j-x[i]][c-1] + y[i]);
+			}
+		}
+		
+		for(int c=1;c<=N;c++) {
+			boolean find = false;
+			int min = -INF;
+			for(int i=X;i<=5000;i++) if(max[i][c] >= Y) {
+				find = true;
+				min = Math.min(min, rec[i][c]);
+			}
+			if(find) {
+				bw.write(c + "\n" + min);
+				return;
+			}
+		}
+		bw.write("-1");
+		
+	}
+	
+}
+
+```