题解 | #密码验证合格程序#

#include <cctype>
#include <iostream>
using namespace std;

int main() {
    string str;
    while (getline(cin, str)) {
        int a[4] = {0};
        if (str.length() < 9) {
            cout << "NG" << endl;
            continue;
        }
        for (int i = 0; i < str.length(); i++) {
            if (isupper(str[i])) a[0]++;
            if (islower(str[i])) a[1]++;
            if (isdigit(str[i])) a[2]++;
            if (ispunct(str[i])) a[3]++;
        }
        int count = 0;
        for (int i = 0; i < 4; i++) {
            if (a[i] != 0) count ++;
        }
        if (count < 3) {
            cout << "NG" << endl;
            continue;
        }
        int tp =0;
        for (int i = 0; i < str.length(); i++) {
            for (int j = i + 1; j < str.length(); j++) {
                if (str[i] == str[j] && str[i + 1] == str[j + 1] && str[i + 2] == str[j + 2]) {
                    tp = 1;
                    break;
                }
            }
        }
        if (tp ==0) cout << "OK" << endl;
        else cout << "NG" << endl;
        str.clear();
    }
}