源代碼：https://gitee.com/shentuzhigang/algorithm/tree/master/exam-alibaba/exam-alibaba-20211119

第一題

題目大意：
有長(zhǎng)度為n的數(shù)組a
有k次機(jī)會(huì)在連續(xù)長(zhǎng)度不超過(guò)m的區(qū)間每個(gè)元素+1使得數(shù)組全部元素變成偶數(shù)

import java.util.LinkedList; import java.util.Scanner;/*** @author ShenTuZhiGang* @version 1.0.0* @email 1600337300@qq.com* @date 2021-11-19 19:16*/ public class Exam2021111901 {public static void main(String[] args) {Scanner scanner = new Scanner(System.in);int t = scanner.nextInt();for (int i = 0; i < t; i++) {int n = scanner.nextInt();int k = scanner.nextInt();int m = scanner.nextInt();int[] a = new int[n];int add = 0;LinkedList<Integer> q= new LinkedList<>();for (int j = 0; j < n; j++) {a[j] = scanner.nextInt();if ((a[j]+add)%2==1){if(q.isEmpty()){k--;add++;q.push(j+m-1);}else{add--;q.pop();}}if(q.peek()!=null&&q.peek()==j){q.pop();add--;}}System.out.println(k>=0?"Yes":"No");}} }

第二題

（未驗(yàn)證正確性）
題目大意：
有 單詞組 strs
人數(shù)n，長(zhǎng)度b
每個(gè)人按單詞組依次報(bào)【0，i】
例：
king
king hello
king hello wrold
king hello
king
king hello
king hello wrold
king hello

求單詞word第X次出現(xiàn)在第幾行

import java.util.Scanner;/*** @author ShenTuZhiGang* @version 1.0.0* @email 1600337300@qq.com* @date 2021-11-19 20:36*/ public class Exam2021111902 {public static void main(String[] args) {Scanner scanner = new Scanner(System.in);int n = scanner.nextInt();int b = scanner.nextInt();scanner.nextLine();String[] s = scanner.nextLine().split(" ");String word = s[0];int c = Integer.parseInt(s[1]);String[] strs = scanner.nextLine().split(" ");if(b==1){System.out.println(b);System.exit(0);}int t = 0;for (int i = 0; i < 2*b-2; i++) {for (int j = 0; j <= i; j++) {if(word.equals(strs[j%n])){t++;}}}int k = c/t;int t0 = c%t;if(t0!=0){for (int i = 0; i < 2*b-2; i++) {for (int j = 0; j <= i; j++) {if(word.equals(strs[j%n])){t0--;if(t0==0){System.out.println(k*(2*b-2)+i);}}}}}else {System.out.println(k*(2*b-2));}}}

總結(jié)

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