#include <iostream>
#include <unordered_set>
using namespace std;
unordered_set<int> x,y;
int main(){
    int n,k,r,c;
    long long xs,ys;
    scanf("%d%d",&n,&k);
    for(int i=0;i<k;i++){
        scanf("%d%d",&r,&c);
        x.insert(r);
        y.insert(c);
    }
    xs=x.size(),ys=y.size();
    cout<<(xs+ys)*n-xs*ys;
}