#include <bits/stdc++.h>
#define fast ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL)
#define ll long long int
#define ld long double
using namespace std;
const int N = 1e6 + 5;
const int MOD = 1e9 + 7;
int len, n, tim[N], v[N], ans;
void solve(){
cin >> len >> n;
for(int i = 1; i <= n; ++i)
cin >> tim[i] >> v[i];
for(int i = 1; i <= n; ++i){
int res = 0;
long double cur = (ld) ((ld) len/(ld) v[i]) + tim[i];
for(int j = 1; j <= n; ++j){
if(i == j) continue;
if(tim[i] < tim[j])
if(cur > ((ld) ((ld) len / (ld) v[j]) + tim[j]))
++res;
}
ans = max(ans, res);
}
cout << ans + 1 << "\n";
}
int main(){
fast;
int t = 1;
// cin >> t;
while(t--)
solve();
return 0;
}
