#include<iostream>

#include<cstdio>

#include<cstring>

#include<algorithm>

#define rii register int i

#define rij register int j

#define int long long

using namespace std;

int cf1[][],cf2[][],x[][];

int n,q,r,c,l,s;

inline int rd(){

    int y=,f=;char ch=getchar();

    while(!isdigit(ch)) {f=ch=='-'?:;ch=getchar();}

    while(isdigit(ch))  {y=(y<<)+(y<<)+ch-'';ch=getchar();}

    return f?y:-y;

}

signed main()

{

    freopen("u.in","r",stdin);

    freopen("u.out","w",stdout);

    n=rd(),q=rd();

    for(rii=;i<=q;i++)

    {

        r=rd(),c=rd(),l=rd(),s=rd();

        cf1[r][c]+=s;

        cf1[r+l][c]-=s;

        cf2[r][c+]+=s;

        cf2[r+l][c+l+]-=s;

    }

    for(rij=;j<=n;j++)

    {

        for(rii=;i<=n;i++)

        {

            cf1[i][j]+=cf1[i-][j];

        }

    }

    for(rii=;i<=n;i++)

    {

        for(rij=;j<=n;j++)

        {

            cf2[i][j]+=cf2[i-][j-];

        }

    }

    for(rii=;i<=n;i++)

    {

        for(rij=;j<=n;j++)

        {

            x[i][j]+=x[i][j-]+cf1[i][j]-cf2[i][j];

        }

    }

    int ans=;

    for(rii=;i<=n;i++)

    {

        for(rij=;j<=n;j++)

        {

            ans^=x[i][j];

        }

    }

    printf("%lld",ans);

    return ;

}