This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
#define pb push_back
#define ff first
#define ss second
#define ins insert
#define arr3 array<int, 3>
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    
    int n; cin>>n;
    vector<arr3> f(n + 1);
    for (int i = 1; i <= n; i++){
        cin>>f[i][0]>>f[i][1]>>f[i][2];
    }
    sort(f.begin() + 1, f.end());
    vector<int> a(n + 1, -1);
    int i = 1, out = -1;
    while (i <= n){
        int mx = -1;
        for (int j = 1; j <= n && f[j][0] < f[i][0]; j++){
            mx = max(mx, a[j]);
        }
        if (mx != -1) out = max(out, mx + f[i][0]);
        
        for (int j = 1; j <= n && f[j][0] < f[i][0]; j++){
            if (f[j][1] > f[i][1] && f[j][2] < f[i][2]){
                a[j] = max(a[j], f[j][1] + f[i][2]);
            }
            if (f[i][1] > f[j][1] && f[i][2] < f[j][2]){
                a[i] = max(a[i], f[i][1] + f[j][2]);
            }
        }
        i++;
    }
    cout<<out<<"\n";
}
| # | Verdict | Execution time | Memory | Grader output | 
|---|
| Fetching results... | 
| # | Verdict | Execution time | Memory | Grader output | 
|---|
| Fetching results... | 
| # | Verdict | Execution time | Memory | Grader output | 
|---|
| Fetching results... | 
| # | Verdict | Execution time | Memory | Grader output | 
|---|
| Fetching results... | 
| # | Verdict | Execution time | Memory | Grader output | 
|---|
| Fetching results... | 
| # | Verdict | Execution time | Memory | Grader output | 
|---|
| Fetching results... | 
| # | Verdict | Execution time | Memory | Grader output | 
|---|
| Fetching results... |