240611 용액

public static void main(String[] args) throws IOException {
	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
	BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
	StringTokenizer st;
	StringBuilder sb = new StringBuilder();
	
	int n = Integer.parseInt(br.readLine());
	int[] fluids = new int[n];
	
	st = new StringTokenizer(br.readLine(), " ");
	for (int i = 0; i < n; i++) {
		fluids[i] = Integer.parseInt(st.nextToken());
	}
	
	Arrays.sort(fluids);
	
	int start = 0;
	int end = n - 1;
	int closestSum = fluids[start] + fluids[end];
	int resultA = start;
	int resultB = end;
	
	while (start < end) {
		int sum = fluids[start] + fluids[end];
		
		if (Math.abs(sum) < Math.abs(closestSum)) {
			closestSum = sum;
			resultA = start;
			resultB = end;
		}
		
		if (sum < 0) {
			start++;
		} else if (sum > 0) {
			end--;
		} else {
			break;
		}
	}
	
	sb.append(fluids[resultA]).append(" ").append(fluids[resultB]);
	bw.write(sb.toString());
	bw.flush();
	bw.close();
	br.close();
}

출처:https://www.acmicpc.net/problem/2467