268A problem solution in c++

// 268A.cpp : This file contains the 'main' function. Program execution begins and ends there.
#include <iostream>
#include<string>
using namespace std;
int main()
{
int anis[1000];
int n, i, j=1, a, b;
cin >> n;
for (i = 0;i < n;i++)
{
cin >> a >> b;
anis[j] = a;
j++;
anis[j] = b;
j++;
}
int z, v=0;
z = j;
for (i = 1;i < z;i+=2)
{
for (j = 2;j < z;j += 2)
{
if (anis[i] == anis[j])
{
v++;
}
}

}
cout << v << endl;
 

}

// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu

// Tips for Getting Started:
//   1. Use the Solution Explorer window to add/manage files
//   2. Use the Team Explorer window to connect to source control
//   3. Use the Output window to see build output and other messages
//   4. Use the Error List window to view errors
//   5. Go to Project > Add New Item to create new code files, or Project > Add Existing Item to add existing code files to the project
//   6. In the future, to open this project again, go to File > Open > Project and select the .sln file

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