您的答案為: 20031201 isn’t a Prime Day!
正確答案為: 20031201 isn't a Prime Day!

您的答案為: 20031211 isn’t a Prime Day!
正確答案為: 20031211 isn't a Prime Day!

您的答案為: 20031218 isn’t a Prime Day!
正確答案為: 20031218 isn't a Prime Day!

您的答案為: 20031225 isn’t a Prime Day!
正確答案為: 20031225 isn't a Prime Day!

您的答案為: 20010107 isn’t a Prime Day!
正確答案為: 20010107 isn't a Prime Day!

您的答案為: 20160107 isn’t a Prime Day!
正確答案為: 20160107 isn't a Prime Day!

您的答案為: 21370217 isn’t a Prime Day!
正確答案為: 21370217 isn't a Prime Day!

您的答案為: 21541024 isn’t a Prime Day!
正確答案為: 21541024 isn't a Prime Day!

您的答案為: 29390312 isn’t a Prime Day!
正確答案為: 29390312 isn't a Prime Day!

您的答案為: 20520721 isn’t a Prime Day!
正確答案為: 20520721 isn't a Prime Day!

您的答案為: 25320707 isn’t a Prime Day!
正確答案為: 25320707 isn't a Prime Day!

您的答案為: 26951018 isn’t a Prime Day!
正確答案為: 26951018 isn't a Prime Day!

您的答案為: 27120706 isn’t a Prime Day!
正確答案為: 27120706 isn't a Prime Day!

您的答案為: 26320422 isn’t a Prime Day!
正確答案為: 26320422 isn't a Prime Day!

您的答案為: 25530529 isn’t a Prime Day!
正確答案為: 25530529 isn't a Prime Day!

您的答案為: 26090303 isn’t a Prime Day!
正確答案為: 26090303 isn't a Prime Day!

您的答案為: 25300530 isn’t a Prime Day!
正確答案為: 25300530 isn't a Prime Day!

您的答案為: 25871104 isn’t a Prime Day!
正確答案為: 25871104 isn't a Prime Day!

您的答案為: 26430409 is a Prime Day!
正確答案為: 26430409 isn't a Prime Day!

您的答案為: 25640610 isn’t a Prime Day!
正確答案為: 25640610 isn't a Prime Day!


＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿附上程式碼＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿

#include <iostream>

using namespace std;

bool isPrime(string s){

    int n=0;

    for(int i=0;i<s.length();i++){

        n*=10;

        n+=s[i]-'0';

    }

    for(int i=2;i*i<n;i++){

        if(n%i==0)return false;

    }

    return true;

}

int main() {

    ios_base::sync_with_stdio(false); cin.tie(NULL);

    int t;

    cin>>t;

    while(t--){

        string s;

        cin>>s;

        string s1=s;

        bool flag=false;

        for(int i=0;i<s.length();i++){

            if(isPrime(s)){

                s[i]=0;

            }

            else{

                flag=true;

                break;

            }

        }

        if(flag)cout<<s1<<" isn’t a Prime Day!\n";

        else cout<<s1<<" is a Prime Day!\n";

    }

}

#0: 5% WA (line:1)

#1: 5% WA (line:1)

#2: 5% WA (line:1)

#3: 5% WA (line:1)

#4: 5% WA (line:2)

#5: 5% WA (line:5)

#6: 5% WA (line:1)

#7: 5% WA (line:1)

#8: 5% WA (line:1)

#9: 5% WA (line:1)

#10: 5% WA (line:2)

#11: 5% WA (line:1)

#12: 5% WA (line:1)

#13: 5% WA (line:1)

#14: 5% WA (line:1)

#15: 5% WA (line:1)

#16: 5% WA (line:1)

#17: 5% WA (line:1)

#18: 5% WA (line:1)

#19: 5% WA (line:1)