#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
int main() {
vector<int> a;
int x,n;
cin>>n;
for(register int i = 0;i < n;i ++) {
cin>>x;
a.push_back(x);
}
vector<int>::iterator it;
it = find(a.begin(),a.end(),5);
if(it == a.end()) {
cout<<"no found";
}
else{
cout<<"found"<<endl;
cout<<distance(a.begin(),it);
}
}
输入：5 1 2 3 5 4
输出：found 3
输入：6 1 2 7 8 9 10
输出：no found
