题解 | 密码强度等级

#include <iostream>
using namespace std;

int main() {
    string s;
    while (cin >>s) { // 注意 while 处理多个 case
        int ans=0;
        int n=s.size();
        if(n<=4)
        ans=5;
        else if(n<=7)
        ans=10;
        else
        ans=25;
        int num=0,alpha=0,abc=0,ABC=0;
        for(char c:s)
        {
            if(c>='a'&&c<='z')
            abc=1;
            if(c>='A'&&c<='Z')
            ABC=1;
            if(c>='0'&&c<='9')
            num++;
            if((c>=0x21&&c<=0x2F)||(c>=0x3A&&c<=0x40)||(c>=0x5B&&c<=0x60)||(c>=0x7B&&c<=0x7E))
            alpha++;
        }
        if(abc&&ABC)
        ans+=20;
        else if(abc||ABC)
        ans+=10;
        if(num==1)
        ans+=10;
        else if(num>1)
        ans+=20;
        if(alpha==1)
        ans+=10;
        else if(alpha>1)
        ans+=25;
        if(num>0&&(abc||ABC))
        {ans+=2;
        if(alpha>0)
        {ans+=1;
        if(abc&&ABC)
        ans+=2;}
        }
        string score;
        if(ans>=90)
        score="VERY_SECURE";
        else if(ans>=80)
        score="SECURE";
        else if(ans>=70)
        score="VERY_STRONG";
        else if(ans>=60)
        score="STRONG";
        else if(ans>=50)
        score="AVERAGE";
        else if(ans>=25)
        score="WEAK";
        else
        score="VERY_WEAK";
        cout << score << endl;
    }
}
// 64 位输出请用 printf("%lld")