#include <iostream>
#define llint long long

using namespace std;

llint n;
llint k[300005], l[300005], d[300005];

bool check(llint x)
{
	llint ret = 0;
	for(int i = 1; i <= n; i++){
		if(x-l[i] < 0) continue;
		llint cnt = (x-l[i])/(1LL<<d[i])+1;
		if(cnt < 0) cnt = 0;
		if(cnt > k[i]) cnt = k[i];
		ret += cnt;
	}
	return ret % 2;
}

int main(void)
{
	ios::sync_with_stdio(0);
	cin.tie(0);
	
	cin >> n;
	for(int i = 1; i <= n; i++) cin >> k[i] >> l[i] >> d[i];
	
	llint ub = 1e18+5, lb = -1, mid;
	while(ub-lb>1){
		mid=(ub+lb)/2;
		if(check(mid)) ub = mid;
		else lb = mid;
	}
	cout << ub << endl;
	
	return 0;
}