很奇怪的解

#include<bits/stdc++.h>
using namespace std;
bool found(string a,string b)
{
    if(a.find(b)!=-1)
        return 1;
    return 0;
}
struct id
{
    string name;
    string num;
}id[101];
int main()
{
    string find;
    int n,flag=0;
    cin >> n;
    for(int i=0;i<n;i++)
    {
        cin >> id[i].name >> id[i].num;
    }
    cin >> find;
    for(int i=0;i<n;i++)
    {
        if(found(id[i].num,find))
        {
            cout << id[i].name << " " << id[i].num << endl;
            flag=1;
        }
    }
    if(flag==0)
        cout << "None.";
}