题目描述

blablabla

样例

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