Codeforces 268A. A. Games Solution
Solve in C++:
//AH Tonmoy
//Department of CSE ,Islamic University
#include<bits/stdc++.h>
using namespace std;
int main()
{
int n,a[1000],b[1000],i,c=0,j;
while(cin>>n)
{
for(i=0; i<n; i++)
{
cin>>a[i]>>b[i];
}
for(i=0; i<n; i++)
{
for(j=0; j<n; j++)
if(a[i]==b[j])
c++;
}
cout<<c<<endl;
c=0;
}
}
//AH Tonmoy
//Department of CSE ,Islamic University
#include<bits/stdc++.h>
using namespace std;
int main()
{
int n,a[1000],b[1000],i,c=0,j;
while(cin>>n)
{
for(i=0; i<n; i++)
{
cin>>a[i]>>b[i];
}
for(i=0; i<n; i++)
{
for(j=0; j<n; j++)
if(a[i]==b[j])
c++;
}
cout<<c<<endl;
c=0;
}
}
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