Java working solution, with some test cases are failing because of "time limit exceed"

public static long arrayManipulation(int n, List> queries) { int row=queries.size(); int col=queries.get(0).size(); //array to hold final combine result from row:0 to row:n long[] arr = new long[n]; long max=0, currMax=0;

    for(int i=0; i<row; i++) {
        int start=queries.get(i).get(0);
        int end=queries.get(i).get(1);
        int val=queries.get(i).get(2);

        for(int j=start-1; j<end; j++) {
            arr[j]=arr[j]+val;
            if(arr[j]>currMax){
                currMax=arr[j];
            }
        }
        if(currMax>max){
            max=currMax;
        }
    }
    return max;
}