[SWEA] 한빈이와 Spot Mart

 

 

[문제]

https://swexpertacademy.com/main/code/problem/problemDetail.do?contestProbId=AW8Wj7cqbY0DFAXN

SW Expert Academy

 

 

 

[소스 코드]

import java.io.*;
import java.util.*;
public class Solution {
	static int n,m,result;
	static int[] snack;
	static boolean[] visit;
	public static void main(String[] args) throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringTokenizer st;
		int T = Integer.parseInt(br.readLine());
		for(int tc=1;tc<=T;tc++) {
			st = new StringTokenizer(br.readLine());
			n = Integer.parseInt(st.nextToken());
			m = Integer.parseInt(st.nextToken());
			snack = new int[n];
			visit = new boolean[n];
			st = new StringTokenizer(br.readLine());
			for(int i=0;i<n;i++) {
				snack[i] = Integer.parseInt(st.nextToken());
			}
			result = -1;
			combi(0,0,0);
			System.out.println("#"+tc+" "+result);
		}
	}
	private static void combi(int idx,int cnt,int sum) {
		if(sum>m) return;
		if(cnt==2) {
			if(sum<=m && sum>result)
				result = sum;
			return;
		}
		for(int i=idx;i<n;i++) {
			if(!visit[i]) {
				visit[i] = true;
				combi(i+1,cnt+1,sum+snack[i]);
				visit[i] = false;
			}
		}
	}
}