// Solution to codechef ZCO13004 (Save Spaceman Spiff).
 
#include <bits/stdc++.h>
using namespace std;
 
int main(int argc, char* argv[])
{
    ios_base::sync_with_stdio(false);
 
    int n, m, k, i;
    cin >> n >> m >> k;
 
    for ( i = 0; i < k; i++ ) {
        int y, x, s, f, t;
        cin >> y >> x >> s >> f;
 
        t = y+x-2;
        if (t >= s && (t - s) % f == 0) {
            cout << "NO\n";
            return 0;
        }
    }
    cout << "YES\n" << (n+m-2) << '\n';
    return 0;
}

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3 2 1 3