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#include <iostream>
#include <bitset>

using namespace std;

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    bitset<1000000> tab[3];
    bitset<1000000> x;
    x.set();
    tab[0].reset();
    tab[1].reset();
    tab[2].reset();
    int a, b, c, d, e;
    cin >> a >> b;
    for(int i = 0; i < b; i ++)
    {
        cin >> c >> d >> e;
        tab[e-1]|= ((x << c)&( x >> (999999 - d)));
    }
    tab[0] = (tab[0]&tab[1])&(~tab[2]);
    cout<< tab[0].count();
    return 0;
}