Description

Submission

class Solution {
public:
    vector<int> corpFlightBookings(vector<vector<int>>& bookings, int n) {
        int m = bookings.size();

        vector<int> diff(n + 2, 0);

        for(auto& book: bookings) {
            diff[book[0]] += book[2];
            diff[book[1]+1] -= book[2]; 
        }

        vector<int> rets;
        int total = 0;
        for(int i = 1; i <= n; ++i) {
            total += diff[i];
            rets.push_back(total);
        }

        return rets;
    }
};


// diff[i] = rets[i] = rets[i-1];