题解 | #密码验证合格程序#

#include<bits/stdc++.h>

using namespace std;


int main(){
    
    
    string input;
    while(cin>>input){
        if(input.size()<=8)
        {
            cout<<"NG"<<endl;continue;
        }
        int s=0;int a=0;int A=0;int other=0;
        for(int i=0;i<input.size();++i){
            if(input[i]>='0'&&input[i]<='9')
                s=1;
            else if(input[i]>='a'&&input[i]<='z')
                a=1;
            else if(input[i]>='A'&&input[i]<='Z')
                A=1;
            else
                other=1;
        }
        if(s+a+A+other<3){
            cout<<"NG"<<endl;continue;
        }
        int flag=0;
        for(int i=0;i<=input.size()-3;++i){
            string str1 = input.substr(i,3);
            for(int j=i+1;j<=input.size()-3;++j){
                if(str1.compare(input.substr(j,3))==0){
                    flag=1;break;
                }
            }
            if(flag==1)break;
        }
        if(flag==1){
            cout<<"NG"<<endl;continue;
        }
        
        cout<<"OK"<<endl;
    }

    return 0;
}