题解 | #小红的区间判断#

#include<iostream>

int main()
{ 
    long a[10000][5];         
    int num;
    std::cin >> num;

    for (int i = 0; i < num; i++)
    {
        for (int j = 1; j <= 4; j++)  
        {
            std::cin >> a[i][j];
        }
    }

    for (int i = 0; i < num; i++)
    {
        if (a[i][3] < a[i][1] && a[i][2] < a[i][4])
        {
            std::cout << "A\n";  
        }
        else if (a[i][1] < a[i][3] && a[i][4] < a[i][2])
        {
            std::cout << "A\n";
        }
        else if (a[i][2] < a[i][3] || a[i][1] > a[i][4])
        {
            std::cout << "B\n";
        }
        else
        {
            std::cout << "C\n";
        }
    }

    return 0;
}