猿辅导8.26笔试
第一题，找出没有匹配上停用词的单词的最高频数，直接暴力
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;
public class Main {
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
int M = Integer.parseInt(br.readLine().trim());
while(M -- > 0){
String[] words = br.readLine().trim().split(" ");
int N = Integer.parseInt(words[0]);
String[] regs = br.readLine().trim().split(" ");
int K = Integer.parseInt(regs[0]);
Map<String, Integer> map = new HashMap<>();
a : for (int i = 1; i <= N; i++) {
String str = words[i].toLowerCase();
for (int j = 1; j <= K; j++) {
if(fit(str, regs[j].toLowerCase())){
continue a;
}
}
map.put(str, map.getOrDefault(str, 0) + 1);
}
int max = 0;
for(String str : map.keySet()){
max = Math.max(map.get(str), max);
}
System.out.println(max);
}
}
private static boolean fit(String str, String reg){
if(str.length() != reg.length()){
return false;
}
for(int i = 0; i < str.length(); i++){
char c = reg.charAt(i);
if(c != '?' && str.charAt(i) != c){
return false;
}
}
return true;
}
} 第二题：数字K分解质因数，且都包含在数组中最小数组子集长度，暴力过 import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class Main {
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
int M = Integer.parseInt(br.readLine().trim());
while(M-- > 0){
String[] params = br.readLine().trim().split(" ");
int K = Integer.parseInt(params[0]);
int N = Integer.parseInt(params[1]);
int[] arr = new int[N];
boolean[] isPrime = new boolean[N];
params = br.readLine().trim().split(" ");
int minLen = Integer.MAX_VALUE;
for (int i = 0; i < N; i++) {
arr[i] = Integer.parseInt(params[i]);
isPrime[i] = isPrime(arr[i]);
}
for(int i = 0; i < N; i++){
if(!isPrime[i] || K % arr[i] != 0){
continue;
}
int temp = K / arr[i];
if(temp == 1){
minLen = 1;
break;
}
for(int j = i + 1; j < N; j++){
if(!isPrime[j] || temp % arr[j] != 0){
continue;
}
temp /= arr[j];
if(temp == 1){
minLen = Math.min(minLen, j - i + 1);
break;
}
}
}
System.out.println(minLen);
}
}
private static boolean isPrime(int n){
if(n == 1){
return false;
}
for(int i = 2; i < (int)Math.sqrt(n) + 1; i++){
if(n % i == 0){
return false;
}
}
return true;
}
} 第三题：游乐园，不太会