qwq

#include<iostream>
using namespace std;
long long n,k,r,c,cnt;
int a[1000000010][1000000010];
int main(){
	cin>>n>>k;
	for(long long i=1;i<=k;i++){
		cin>>r>>c;
		for(long long j=1;j<=n;j++){
			a[r][j]=1;
		}
		for(long long k=1;k<=n;k++){
			a[k][c]=1;
		}
	}
	for(long long i=1;i<=n;i++){
		for(long long j=1;j<=n;j++){
			if(a[i][j]==1) cnt++;
		}
	}
	cout<<cnt<<endl;
	return 0;
}