<p>A transaction is possibly invalid if:</p>

<ul>
	<li>the amount exceeds <code>$1000</code>, or;</li>
	<li>if it occurs within (and including) <code>60</code> minutes of another transaction with the <strong>same name</strong> in a <strong>different city</strong>.</li>
</ul>

<p>You are given an array of strings <code>transaction</code> where <code>transactions[i]</code> consists of comma-separated values representing the name, time (in minutes), amount, and city of the transaction.</p>

<p>Return a list of <code>transactions</code> that are possibly invalid. You may return the answer in <strong>any order</strong>.</p>

<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>

<pre>
<strong>Input:</strong> transactions = [&quot;alice,20,800,mtv&quot;,&quot;alice,50,100,beijing&quot;]
<strong>Output:</strong> [&quot;alice,20,800,mtv&quot;,&quot;alice,50,100,beijing&quot;]
<strong>Explanation:</strong> The first transaction is invalid because the second transaction occurs within a difference of 60 minutes, have the same name and is in a different city. Similarly the second one is invalid too.</pre>

<p><strong class="example">Example 2:</strong></p>

<pre>
<strong>Input:</strong> transactions = [&quot;alice,20,800,mtv&quot;,&quot;alice,50,1200,mtv&quot;]
<strong>Output:</strong> [&quot;alice,50,1200,mtv&quot;]
</pre>

<p><strong class="example">Example 3:</strong></p>

<pre>
<strong>Input:</strong> transactions = [&quot;alice,20,800,mtv&quot;,&quot;bob,50,1200,mtv&quot;]
<strong>Output:</strong> [&quot;bob,50,1200,mtv&quot;]
</pre>

<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>

<ul>
	<li><code>transactions.length &lt;= 1000</code></li>
	<li>Each <code>transactions[i]</code> takes the form <code>&quot;{name},{time},{amount},{city}&quot;</code></li>
	<li>Each <code>{name}</code> and <code>{city}</code> consist of lowercase English letters, and have lengths between <code>1</code> and <code>10</code>.</li>
	<li>Each <code>{time}</code> consist of digits, and represent an integer between <code>0</code> and <code>1000</code>.</li>
	<li>Each <code>{amount}</code> consist of digits, and represent an integer between <code>0</code> and <code>2000</code>.</li>
</ul>

class Node{
    public:
    string name;
    int time;
    int amount;
    string city;

    Node(){}

    Node(string name,int time,int amount,string city){
        this->name=name;
        this->time=time;
        this->amount=amount;
        this->city=city;
    }
};
class Solution {
public:
    vector<string> invalidTransactions(vector<string>& transactions) {

        vector<Node>fans;
        int n=transactions.size();
        vector<int>v(n,0);
        vector<string>ans;
       

        for(int i=0;i<transactions.size();i++){
            stringstream ss(transactions[i]);
            Node node;
            string name;
            getline(ss, name, ',');
            node.name = name;
            string time;
            getline(ss, time, ',');
            node.time = stoi(time);
            string amount;
            getline(ss, amount, ',');
            node.amount = stoi(amount);
            string city;
            getline(ss, city, ',');
            node.city = city;

            fans.push_back(node);
        }

        for(int i=0;i<n;i++)
        {
             
            if(fans[i].amount > 1000){
                    v[i]=1;
                   
            }
            for(int j=i+1;j<n;j++){
              //  cout<<abs(fans[i].time - fans[j].time)<<endl;
                if(abs(fans[i].time - fans[j].time)<=60 && fans[i].name == fans[j].name  && fans[i].city != fans[j].city){
                   
                    v[j]=1;
                    v[i]=1;

                   
                }
            }
        }

        for(int i=0;i<n;i++){
            if(v[i]==0){
                continue;
            }
            string str = fans[i].name+","+to_string(fans[i].time)+","+to_string(fans[i].amount)+","+fans[i].city;

            ans.push_back(str);
        }

        return ans;
        
    }
};
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