codeforces 133A（HQ9+） Java

codeforces 字符串水题

输入的字符串中是否含有 H、Q、+ 这三种字符。

方法一：

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner in = new Scanner(new BufferedReader(new InputStreamReader(
                System.in)));
        PrintWriter out = new PrintWriter(System.out);
        String inputProgram;
        while (in.hasNext()) {
            inputProgram = in.next();
            if(inputProgram.contains("H") || inputProgram.contains("Q") || inputProgram.contains("9")){
                out.println("YES");
            }else{
                out.println("NO");
            }
        }
        out.flush();
    }
}

方法二：（本人认为这种方法应该要快一些，毕竟只需遍历字符串一遍或者更少，但是第一种方法代码量真少）
对于水题，两种方法效率差不多.

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner in = new Scanner(new BufferedReader(new InputStreamReader(
                System.in)));
        PrintWriter out = new PrintWriter(System.out);
        String inputProgram;
        boolean hasOutput;
        while (in.hasNext()) {
            inputProgram = in.next();
            hasOutput = false;
            char temp;
            for (int index = 0; index < inputProgram.length(); index++) {
                temp = inputProgram.charAt(index);
                if( temp == 'H' || temp == 'Q' || temp == '9' ){
                    out.println("YES");
                    hasOutput = true;
                    break;
                }
            }
            if(!hasOutput){
                out.println("NO");
            }
        }
        out.flush();
    }
}

最后

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