093-simple-fun-1-seats-in-theater.js

// Task

// Your friend advised you to see a new performance in the most popular
// theater in the city. He knows a lot about art and his advice is usually
// good, but not this time: the performance turned out to be awfully dull.
// It's so bad you want to sneak out, which is quite simple, especially since
// the exit is located right behind your row to the left. All you need to do
// is climb over your seat and make your way to the exit.

// The main problem is your shyness: you're afraid that you'll end up blocking
// the view (even if only for a couple of seconds) of all the people who sit
// behind you and in your column or the columns to your left. To gain some
// courage, you decide to calculate the number of such people and see if you
// can possibly make it to the exit without disturbing too many people.

// Given the total number of rows and columns in the theater (nRows and nCols,
// respectively), and the row and column you're sitting in, return the number
// of people who sit strictly behind you and in your column or to the left,
// assuming all seats are occupied.

function seatsInTheater(nCols, nRows, col, row) {
  return (nCols - col + 1) * (nRows - row);
}