2023.7.10

import java.util.Scanner;

public class test
{
    public static void main(String[] args)
    {
        int i = 0;
        int sum = 0;
      
        while(i<100)
        {
            i++;
            sum = sum+i;
        }
      
        System.out.println(sum);
    }
}
//do  while循环  先执行后判断，至少执行一遍
//while 先判断后执行

#include<iostream>
#include <iomanip>
#include<cstdio>
#include<cmath>
#include<cstring>
using namespace std;
class Student
{
public:
    int sex;
    string name;
};
void test01()
{
    int n;
    cin >> n;
    Student* s = new Student[n];
    for (int i = 0; i < n; i++)
    {
        cin >> s[i].sex >> s[i].name;
    }
    int flag[50] = { 0 };
    for (int i = 0; i < n; i++)
    {
        for (int j = n - 1; j >= 0; j--)
        {
            if (flag[i] == 0 && flag[j] == 0 && s[i].sex != s[j].sex)
            {
                cout << s[i].name << " " << s[j].name << endl;
                flag[i] = 1;
                flag[j] = 1;
            }
        }
    }
    delete[] s;
}
int main()
{
    test01();
    return 0;
}