22 条题解

  • 9
    @ 2022-8-16 18:27:01

    这一道题会不会输入样例出现 0 呢?不确定,先用字符串来做吧~

    1. 先定义 a 和 b,并且输入 a(老样子)
    2. 然后回文 b(老样子,除非你前面没做,不然怎么可能不会!)
    3. 再次循环一遍,判断每一个元素都一样,如果有一次不一样,输出 NO 并且结束代码
    4. 坚持到最后的就输出 YES 并且养成好习惯~

    上代码!(AC过!)

    #include <bits/stdc++.h>
    using namespace std;
    int main()
    {
        int s = 0;
    	char a[5], b[5];
        cin.getline(a, 5, '\n');
        for (int i = 3; i >= 0; i--)
        {
            b[s] = a[i];
            s++;
        }
        for (int i = 0; i <= 3; i++)
        {
            if (a[i] != b[i])
            {
                cout << "NO";
                return 0;
            }
        }
        cout << "YES";
    	return 0;
    }
    
    • @ 2023-12-7 21:07:39
      #include<iostream> 
      using namespace std;
      int main(){
      	int n,m=0;
      	cin>>n;
      	int a=n;
      	while(n>0){
      		m=m*10+n%10;
      		n/=10;
      	}
      	if(a==m){
      		cout<<"YES";
      	}
      	else{
      		cout<<"NO";
      		
      	}
      	return 0;
      }
      

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    • @ 2024-2-7 16:55:28

      好😄 🎉️ @

  • 4
    @ 2023-8-30 11:04:45

    过辣!

    坑蒙拐骗,样样精通!

        string a;
        cin>>a;
        if (a[0]==a[3] && a[1]==a[2])
        {
            cout<<"YES";
            return 0;
        }
        cout<<"NO";
    
    • 3
      @ 2024-3-17 9:42:05

      跟上次判断回文数是一样的

      #include<bits/stdc++.h>
      using namespace std;
      int main()
      {
          string a;
          cin>>a;
          string b=a;
          reverse(b.begin(),b.end());
          if(a==b)
          {
              cout<<"YES";
          }
          else
          {
              cout<<"NO";
          }
          return 0;
      }
      
      • 3
        @ 2023-7-22 14:34:57
        #include<bits/stdc++.h>
        using namespace std;
        int main()
        {
            int n;
            cin>>n;
            int a,b,c,d;
            a = n/1000;
            b = n/100%10;
            c = n/10%100%10;
            d = n%1000%100%10;
            if(a == d && b == c)
            {
                cout<<"YES";
            }
            else
            {
                cout<<"NO";
            }
            return 0;
        }z
        
        • 1
          @ 2024-4-29 21:13:09

          这道题肥肠简单,下面是几种解法:

          一,字符串分解:

          (已AC,可安全食用)

          #include<bits/stdc++.h>
          using namespace std;
          int main()
          {
          	string a;
          	cin >> a;
          	if (a[0] == a[3] && a[1] == a[2])
          	{
          		cout << "YES";
          	}
          	else
          	{
          		cout << "NO";
          	}
          	return 0;
          }
          

          二,整型分解:

          (同样AC,请放心食用)

          #include<bits/stdc++.h>
          using namespace std;
          int main()
          {
          	int a;
          	cin >> a;
          	if (a % 10 == a / 1000 && a / 10 % 10 == a / 100 % 10)
          	{
          		cout << "YES";
          	}
          	else
          	{
          		cout << "NO";
          	}
          	return 0;
          }
          

          问:这类题已经考过几次了?!

          • 1
            @ 2024-2-21 18:28:55
            //这题……几乎和对称数那题一模一样啊……
            #include<iostream>
            using namespace std;
            string a;//字符串
            int main(){
                cin>>a;
                //可以参考https://oj.hetao101.com/d/training/p/626这题的代码
                for(int i=0;i<=1;i++){
                    if(a[3-i]!=a[i]){
                        cout<<"NO";
                        return 0;
                    }
                }
                cout<<"YES";//但是要注意输出
            }//原题:四位回文数
            //编者:@Royal
            
            • 1
              @ 2023-12-7 21:05:56
              #include<iostream> 
              using namespace std;
              int main(){
              	int n,m=0;
              	cin>>n;
              	int a=n;
              	while(n>0){
              		m=m*10+n%10;
              		n/=10;
              	}
              	if(a==m){
              		cout<<"YES";
              	}
              	else{
              		cout<<"NO";
              		
              	}
              	return 0;
              }
              
              • 1
                @ 2023-8-23 19:31:10

                太简单了😄!

                #include <iostream>
                using namespace std;
                int main()
                {
                    string n;
                    cin>>n;//输入
                    if (n[0]==n[3] && n[1]==n[2])//判断回文数
                    {
                        cout<<"YES";//输出
                    }
                    else
                    {
                        cout<<"NO";//输出
                    }
                    return 0;
                }
                

                代码这么简洁👍 ,剪切?复制?编程不易😕 ,赞在哪里👀️ ?

                • 1
                  @ 2022-12-17 13:46:13
                  #include <bits/stdc++.h> 
                  using namespace std;
                  int main()
                  {
                      int x;
                      cin >> x;
                      int a = x, num = 0;
                      for (int i = 4; i >= 1; i--)
                      {
                          num = num * 10 + a % 10;
                          a /= 10;
                      }
                      if (x == num)
                      {
                          cout << "YES";
                      }
                      else
                      {
                          cout << "NO" ;
                      }
                  	return 0;
                  }
                  

                  我也来玩玩儿。

                  • 1
                    @ 2022-11-20 17:04:22

                    真的是肥肠简单,直接上!

                    #include <iostream>
                    using namespace std;
                    int main()
                    {
                    	bool flag = true;
                    	string s;
                    	cin >> s;
                    	for(int i = 0; i < s.length(); i++)//后来一想,s.length()也可以转为4
                        {
                    		if(s[i] != s[3 - i])
                            {
                    			flag = false;
                    			break;
                    		} 
                    	} 
                    	if(flag) 
                        {
                            cout<<"YES";
                        }
                        else
                        {
                            cout << "NO";
                        }
                    	return 0;
                    }
                    
                    • 0
                      @ 2022-10-24 21:22:09

                      这道题有又是回文数的题,可以用string来做

                      1.定义一个布尔类型的变量用来存储答案,再定义一个字符串类型的n

                      2.依次判断,第一个元素是否等于倒数第一个元素,第二个元素是否等于倒数第二个,以此类推;

                      3.只要其中有一组不相同,这个n就可以pass掉了,直接break;

                      4.判断布尔变量,输出


                      至此这段代码就能完美Accepted啦

                      上代码吧

                      using namespace std;
                      int main(){
                      	bool a=1;
                      	string n;
                      	cin>>n;
                      	for(int i=0;i<4;i++){
                      		if(n[i]!=n[3-i]){
                      			a=0;
                      			break;
                      		} 
                      	} 
                      	if(a) cout<<"YES";
                      	else cout<<"NO";
                      	return 0;
                      } 
                      }
                      
                      • 0
                        @ 2022-8-26 19:34:56

                        #include <bits/stdc++.h> using namespace std; int main() { int n,a,b,c,d; cin>>n; a=n/1000; b=(n-a1000)/100; c=(n-a1000-b100)/10; d=(n-a1000-b100-c10)/1;//获取千百十个的数字 if (ad && bc){//如果第一位等于第四位并且第二位等于第三位,输出YES cout<<"YES"; } else { cout<<"NO";//输出NO } return 0; }

                        • -1
                          @ 2024-5-28 19:25:53
                          #include <iostream>
                          using namespace std;
                          int main()
                          {
                              int b,a1,a2,g1,g2;
                              cin>>b;
                              a1=b/1000;
                              a2=b%10;
                              g1=b/100-a1*10;
                              g2=(b%100-a2)/10;
                              if((a1==a2)&&(g1==g2))
                              {
                                  cout<<"YES";
                              }
                              else
                              {
                                  cout<<"NO";
                              }
                              return 0;
                          }
                          
                          • -1
                            @ 2023-12-23 11:16:37
                            #include <bits/stdc++.h>
                            using namespace std;
                            string rev(string s){//编写翻转函数
                                string s1;
                                for (int i = s.length() - 1; i >=  0; i--){
                                    s1=s1+s[i]; 
                                }
                                return s1;
                            }
                            int main(){
                                string s;
                                getline(cin,s,'.');//读到‘.’终止
                                string a=rev(s);//调用函数,翻转字符串
                                if (s==a) cout<<"TRUE";//如果字符串倒过来一样,输出TRUE
                                else cout<<"FALSE";//否则输出FALSE
                            }
                            
                            • -1
                              @ 2023-8-10 20:33:19
                              #include <bits/stdc++.h>
                              using namespace std;
                              int main()
                              {
                              int s = 0;
                              char a[5], b[5];
                              cin.getline(a, 5, '\n');
                              for (int i = 3; i >= 0; i--)
                              {
                              b[s] = a[i];
                              s++;
                              }
                              for(int i=0;i<=3;i++)
                              {
                              if(a[i]!=b[i])
                              {
                              cout << "NO";
                               return 0;
                              }
                              }
                              cout << "YES";
                              return 0;
                              }
                              
                              • -1
                                @ 2023-7-22 12:39:25
                                #include <cstdio>
                                using namespace std;
                                int main(){
                                    int n,x,i=0,a[4];
                                    scanf("%d",&n);
                                    x=n;
                                    while(x>0)a[i]=x%10,x/=10,i++;
                                    a[0]==a[3]&&a[1]==a[2]?printf("YES\n"):printf("NO\n");
                                    return 0;
                                }
                                
                                • -1
                                  @ 2023-4-9 16:32:12

                                  #include <iostream> using namespace std; int b[5], cnt = 4; string s; bool d; int main() { d = true; cin >> s; for (int i = 0;i < 4;i++) { if (s[i] != s[3 - i]) { d = false; } } if (d) { cout << "YES"; } else { cout << "NO"; } return 0; }

                                  • -1
                                    @ 2023-4-6 20:34:44

                                    比较基础。 这里只是四位的话就不用设置位数 数值就行,不一定要用string*

                                    int a = x / 1000 , b = x % 1000 / 100 , c = x % 1000 % 100 / 10 , d = x % 1000 % 100 % 10;
                                        int j = d * 1000 + c * 100 + b * 10 + a;
                                        if(x == j)
                                        {
                                            cout<<"YES";
                                        }
                                        else
                                        {
                                            cout<<"NO";
                                        }
                                    ```*
                                    
                                    • -1
                                      @ 2023-4-2 14:45:24
                                      #include <iostream>
                                      using namespace std;
                                      int main()
                                      {
                                          int n,a[5];
                                          cin >> n;
                                          for (int i = 1; i <= 4; i++)
                                          {
                                              a[i] = n % 10;
                                              n /= 10;
                                          }
                                          if (a[1] == a[4] && a[2] == a[3])
                                          {
                                              cout << "YES";
                                          }
                                          else
                                          {
                                              cout << "NO";
                                          }
                                      	return 0;
                                      }
                                      
                                      • -1
                                        @ 2022-12-30 14:47:44
                                        using namespace std;
                                        int main()
                                        {
                                            int n;
                                            cin>>n;
                                            if((n%10==n/1000%10)&&(n/10%10==n/100%10))cout<<"YES";//判断是否回文
                                            else cout<<"NO";
                                            return 0;
                                        }
                                        

                                        信息

                                        ID
                                        1235
                                        时间
                                        1000ms
                                        内存
                                        256MiB
                                        难度
                                        4
                                        标签
                                        递交数
                                        1995
                                        已通过
                                        971
                                        上传者