WA求调

#include<iostream>
#include<string>
using namespace std;
bool fulnum(string s){
    int t;
    for(t=0;t<s.size();t++){
        if(!(s[t]>=48&&s[t]<=57)){
            return false;
            break;
        }
    }
    if(t==s.size()){
        return true;
    }
}
int main(){
    int n;
    cin>>n;
    for(int m=0;m<n;m++){
        string a;
        getline(cin,a);
        if(fulnum(a)){
            cout<<"https://www.luogu.com.cn/problem/P"<<a<<"\n";
        }else{
            cout<<"https://www.luogu.com.cn/problem/"<<a<<"\n";
        }
    }
    return 0;
}