HDU - 1029 Ignatius and the Princess IV （Java - map）

Ignatius and the Princess IV

 

藉此機會，學習了一下java中的map類

import java.util.*;
import java.math.*;
import java.io.*;

public class Main {

	public static void main(String[] args) {
		Scanner cin = new Scanner(System.in);
		
		while(cin.hasNext()){
			int n = cin.nextInt();
			Map<Integer, Integer>mp = new HashMap<Integer, Integer>();
			int[] a = new int[n];
			for(int i = 0; i < n; i++) {
				a[i] = cin.nextInt();
			}
			int maxx = 0;
			int ans = 0;
			for(int i = 0; i < n; i++) {
				if(mp.containsKey(a[i])) {
					int cnt = mp.get(a[i]) + 1;
					mp.put(a[i], cnt);
					if(cnt >= (n+1)/2) {
						ans = a[i];
					}
				}
				else {
					mp.put(a[i], 1);
				}
			}
			System.out.println(ans);
		}
	}
}