#include<stdio.h>
struct xy {
	int x, y, p;
}a[1212];
bool is_in(xy a, xy b) {
	int d = (a.x - b.x)*(a.x - b.x) + (a.y - b.y)*(a.y - b.y);
	return d <= a.p*a.p;
}
int n; 
bool is_gone[1212];
void dfs(int w) {
	is_gone[w] = 1;
	for (int i = 0; i < n; i++) {
		if (is_gone[i])continue;
		if(is_in(a[w],a[i]))dfs(i);
	}
}
int main() {
	int i, j, ans = 0;
	scanf("%d", &n);
	for (i = 0; i < n; i++)scanf("%d%d%d", &a[i].x, &a[i].y, &a[i].p);
	for (i = 0; i < n; i++) {
		int res = 0;
		dfs(i);
		for (j = 0; j < n; j++) {
			res += is_gone[j];
			is_gone[j] = 0;
		}
		if (ans < res)ans = res;
	}
	printf("%d", ans);
	return 0;
}

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NAoxIDMgNQo1IDQgMwo3IDIgMQo2IDEgMQ==

4
1 3 5
5 4 3
7 2 1
6 1 1