#include <iostream>
#include <algorithm>
#include <cstdio>
#include <string.h>
using namespace std;
const int INF = 99999999;
struct node{
    int x;
    int y;
    int z;
};
node a[4005];
int dp[400000];
int Count[400005];
bool cmp(node a,node b){
    return a.y < b.y ;//玄学排序
}

int main()
{

    int n;
    cin >> n;
    int maxx = -1;
    for(int i = 0;i < n;i++){
        cin >> a[i].x >> a[i].y >> a[i].z;
        //maxx = max(maxx,a[i].y);
    }
    sort(a,a+n,cmp);
    memset(dp,0,sizeof(dp));
    for(int i = 0;i < n;i++){
        memset(Count,0,sizeof(Count));
        for(int j = a[i].x;j <= a[i].y;j++){
            if(dp[j-a[i].x] + a[i].x > dp[j] && Count[j-a[i].x]+1 <= a[i].z && dp[j-a[i].x] + a[i].x <= a[i].y){
                dp[j] = dp[j-a[i].x] + a[i].x;//多重背包模板
                Count[j] = Count[j-a[i].x]+1;
                //cout << dp[j] << endl;

            }
        }
    }
    bool flag = false;
    //cout << maxx << endl;
    for(int i = 0;i <= 40000;i++){
        if(dp[i] > 0){
            maxx = max(maxx,dp[i]);
            flag = true;
        }
    }
    if(!flag) cout <<0<< endl;//蜜汁0
    else cout << maxx << endl;
    return 0;
}

https://vjudge.net/contest/258799#problem/F