Why are my getting the wrong answer?

I don't know why I'm getting a wrong answer for "The Morning Commute". It works on all of the examples they provided. Please help me!

The Problem: http://www.codechef.com/problems/COMMUTE

My Code:

  #include <iostream>
  using namespace std;int main() {
int t, n;
cin >> t;
while (t--){
    cin >> n;
    int ** schedule;
    schedule = new int*[n];
    for (int a = 0; a < n; a++){
        schedule[a] = new int[3];
        cin >> schedule[a][0] >> schedule[a][1] >> schedule[a][2];
    }
    int current_time, total_time;
    current_time = 0;
    total_time = 0;
    for (int a = 0; a < n; a++){
        if (current_time < schedule[a][0]){
            total_time += schedule[a][0] - current_time;
            current_time = schedule[a][0];
        }
        else {
            if (current_time%schedule[a][2] != 0){
                total_time += schedule[a][2] - (current_time % schedule[a][2]);
                current_time += schedule[a][2] - (current_time % schedule[a][2]);
            }
        }
        total_time += schedule[a][1];
        current_time += schedule[a][1];
    }
    cout << total_time << endl;
}
return 0;

}