Codeforces Cells Not Under Attack

#include<iostream>
#include<cstdio>
#include<cmath>
#include<cstring>
#include<algorithm>
#include<map>

#define cf %I64d

using namespace std;

#define sf scanf
#define pf printf

typedef long long LL;
typedef map<LL,bool>mpll;

int main()
{
    LL n,m;

    mpll ro, col;

    while(~sf("%I64d %I64d", &n, &m))
    {
        ro.clear();
        col.clear();

        LL i , Row=0, Column=0;

        for(i=0; i<m; i++)
        {
            LL x,y;
            sf("%I64d %I64d", &x, &y);

            if(!ro[x])
            {
                Row++;
                ro[x]=true;
            }

            if(!col[y])
            {
                Column++;
                col[y] = true;
            }

            //cout << Row << " " << Column << "\n";

            LL ans = (n - Row) * (n - Column);

            pf("%I64d\n", ans);
        }
    }

    return 0;
}