题目描述

blablabla

样例

#include <iostream>
using namespace std;
int main()
{
    int x;
    cin >> x;
    switch(x)
    {
        case 61:
            cout << "Brasilia" << endl;break;
        case 71:
            cout << "Salvador" << endl;break;
        case 11:
            cout << "Sao Paulo" << endl;break;
        case 21:
            cout << "Rio de Janeiro" << endl;break;
        case 32:
            cout << "Juiz de Fora" << endl;break;
        case 19:
            cout << "Campinas" << endl;break;
        case 27:
            cout << "Vitoria" << endl;break;
        case 31:
            cout << "Belo Horizonte" << endl;break;
        default:
            cout << "DDD nao cadastrado" << endl;break;
    }
    return 0;
}

算法1

(暴力枚举) $O(n^2)$

blablabla

时间复杂度

参考文献

C++ 代码

blablabla

算法2

(暴力枚举) $O(n^2)$

blablabla

时间复杂度

参考文献

C++ 代码

blablabla