题解 | 密码强度等级

#include <iostream>
using namespace std;

int main() {
    string s;

    string str = "!\"#$%&\'()*+,-./:;<=>?@[\]^_`{|}~";


    while (getline(cin, s)) {
        int size = s.size();
        int sum = 0;

        // 1. 长度
        if (size <= 4)
            sum += 5;
        else if (size > 4 && size < 8)
            sum += 10;
        else
            sum += 25;

        bool hasLowercase = false, hasUppercase = false;
        int numCount = 0, charCount = 0;
        for (char c : s) {
            if (islower(c))
                hasLowercase = true;

            if (isupper(c))
                hasUppercase = true;

            if (isdigit(c))
                numCount++;

            if (str.find(c) != string::npos)
                charCount++;
        }

        // 2. 字母
        if (hasLowercase && hasUppercase)
            sum += 20;
        else if (hasLowercase || hasUppercase) {
            sum += 10;
        }

        // 3. 数字
        if (numCount == 1)
            sum += 10;
        else if (numCount > 1)
            sum += 20;

        // 4. 符号
        if (charCount == 1)
            sum += 10;
        else if (charCount > 1)
            sum += 25;

        // 5. 奖励
        if (hasLowercase && hasUppercase && numCount && charCount)
            sum += 5;
        else if ((hasLowercase || hasUppercase) && numCount && charCount)
            sum += 3;
        else if (numCount && charCount)
            sum += 2;

        if (sum >= 90)
            cout << "VERY_SECURE" << endl;
        else if (sum >= 80)
            cout << "SECURE" << endl;
        else if (sum >= 70)
            cout << "VERY_STRONG" << endl;
        else if (sum >= 60)
            cout << "STRONG" << endl;
        else if (sum >= 50)
            cout << "AVERAGE" << endl;
        else if (sum >= 25)
            cout << "WEAK" << endl;
        else if (sum >= 0)
            cout << "VERY_WEAK" << endl;
    }


}