题解 | #密码强度等级#

while let str = readLine() {
    var score = 0
    let len = str.count
    if len <= 4 {
        score += 5
    } else if len <= 7 && len >= 5 {
        score += 10
    } else if len >= 8 {
        score += 25
    }
    let tmp = "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~"
    let signals = [Character](tmp)
    let array = [Character](str)
    var upperCount = 0
    var lowerCount = 0
    var numCount = 0
    var signalCount = 0
    for char in array {
        if char >= Character("A") && char <= Character("Z") {
            upperCount += 1
        } else if char >= Character("a") && char <= Character("z") {
            lowerCount += 1
        } else if char >= Character("0") && char <= Character("9") {
            numCount += 1
        }
        if signals.contains(char) {
            signalCount += 1
        }
    }
    if upperCount > 0 && lowerCount > 0 {
        score += 20
    } else if upperCount > 0 || lowerCount > 0 {
        score += 10
    }
    if numCount > 1 {
        score += 20
    } else if numCount == 1 {
        score += 10
    }
    if signalCount > 1 {
        score += 25
    } else if signalCount == 1 {
        score += 10
    }
    if upperCount > 0 && lowerCount > 0 && numCount > 0 && signalCount > 0 {
        score += 5
    } else if (upperCount > 0 || lowerCount > 0) && numCount > 0 && signalCount > 0 {
        score += 3
    } else if (upperCount > 0 || lowerCount > 0) && numCount > 0 {
        score += 2
    }
    if score >= 90 {
        print("VERY_SECURE")
    } else if score >= 80 {
        print("SECURE")
    } else if score >= 70 {
        print("VERY_STRONG")
    } else if score >= 60 {
        print("STRONG")
    } else if score >= 50 {
        print("AVERAGE")
    } else if score >= 25 {
        print("WEAK")
    } else {
        print("VERY_WEAK")
    }
}