#include<bits/stdc++.h>
using namespace std;
using Int = long long;
template<typename T1,typename T2> inline void chmin(T1 &a,T2 b){if(a>b) a=b;}
template<typename T1,typename T2> inline void chmax(T1 &a,T2 b){if(a<b) a=b;}


struct FastIO{
  FastIO(){
    cin.tie(0);
    ios::sync_with_stdio(0);
  }
}fastio_beet;

//INSERT ABOVE HERE
signed main(){  
  Int n;
  cin>>n;
  vector<Int> a(n),b(n),c(n);
  for(Int i=0;i<n;i++) cin>>a[i]>>b[i]>>c[i];

  auto calc=
    [&](Int x)->Int{
      Int res=0;
      for(Int i=0;i<n;i++){
        if(x<=b[i]){
          res+=a[i];
          continue;
        }
        Int d=(x-b[i]);
        Int e=(d+(1LL<<c[i])-1)>>c[i];
        if(a[i]>e) res+=a[i]-e;
      }
      //cout<<x<<" "<<res<<endl;
      res&=1;
      return res;
    };
  
  Int l=0,r=1.1e18;
  while(l+1<r){
    Int m=(l+r)>>1;
    if(calc(m)) l=m;
    else r=m;
  }  
  cout<<l<<endl;
  return 0;
}