http://poj.org/problem?id=3664 //* @author ������<hongxp11@163.com> import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.Scanner; public class Main { static class vote { int first; int second; int index; } public static void main(String[] args) { Scanner in = new Scanner(System.in); int N = in.nextInt(); int K = in.nextInt(); // vote[] voters = new vote[N]; ArrayList< vote> voters = new ArrayList< vote>(); for (int i = 0; i < N; i++) { vote temp = new vote(); temp.first = in.nextInt(); temp.second = in.nextInt(); temp.index = i + 1; voters.add(temp); } Collections.sort(voters, new Comparator< Object>() { public int compare(Object o1, Object o2) { vote a = (vote) o1; vote b = (vote) o2; return b.first - a.first; } }); int result = 0; for (int i = 1; i < K; i++) { if (voters.get(result).second < voters.get(i).second) { result = i; } } System.out.println(voters.get(result).index); } }
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