Help needed in Codeforces Round #697 (Div. 3) problem

help
1

I am not able to figure out the error? can somebody please help me with this

2

#include<bits/stdc++.h>
using namespace std;

const int N = 2 * (1e5 + 5);

int boys[N];
int girls[N];

vector B;
vector G;

int fun(int a, int b, int k) {

for(int i = 0; i < k; i++) {
	B.push_back(boys[i]);
	G.push_back(girls[i]);
}

if(k < 2) return 0;

int ans = 0;

for(int i = 0; i < k - 1; i++) {
	
	int one = B[i];
	int two = G[i];
	
	int x = count(B.begin() + i + 1, B.end(), one);
	int y = count(G.begin() + i + 1, G.end(), two);
	
	int cnt = k - (i + 1 + x + y);
	
	ans +=  cnt;
	
}

B.clear();
G.clear();

return ans;

}

void solve() {
int a, b, k;
cin>>a>>b>>k;

for(int i = 0; i < k; i++) {
	cin>>boys[i];
}
for(int j = 0; j < k; j++) {
	cin>>girls[j];
}

cout<<fun(a, b, k)<<endl;

}

int main() {
int t;
cin>>t;

while(t--) solve();

return 0;

}

3

which problem?? send the link

4
5

My solution is on the top. Help me to rectify the error

6

You are recounting certain pairs. So, you need to maintain a frequency or degree for each boy and girl and then select the pairs.
Link to my submission:

7

Thanks a lot.

8

Check this post