#include<iostream>
#include<memory.h>
#define MAXN 50001
#define MAXP 20
using namespace std;
 
int n;
int dp[MAXN];
int ST[MAXN][MAXP];
int V[MAXN] , A[MAXN] , B[MAXN];
 
int getmax(int L , int R)
{
    if(L > R)
        return 0;
    int s = 0;
    while((1 << (s + 1)) <= R - L + 1)
        s++;
    return max(ST[L][s] , ST[R - (1 << s) + 1][s]);
}
 
void update(int w)
{
    ST[w][0] = dp[w];
    for(int i = 1 ; w + (1 << i) - 1 <= n ; i++)
        ST[w][i] = max(ST[w][i - 1] , ST[w + (1 << (i - 1))][i - 1]);
}
 
int main()
{
    ios::sync_with_stdio(false);
    while(cin>>n)
    {
        memset(ST , 0 , sizeof(ST));
        for(int i = 1 ; i <= n ; i++)
        {
            cin>>V[i]>>A[i]>>B[i];
            A[i] = A[i] + i;
            B[i] = min(B[i] + i - 1 , n);
        }
        for(int i = n ; i >= 1 ; i--)
        {
            dp[i] = V[i] + getmax(A[i] , B[i]);
            update(i);
        }
        cout<<dp[1]<<endl;
    }
    return 0;
}
 

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3
1 1 2
2 2 3
3 3 4
3
1 1 3
2 2 4
3 3 5
4
10 3 10
7 1 7
5 2 5
1 1 2
5
1 1 9
10 3 10
7 1 7
5 2 5
1 1 2