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Ist ein 2D-Feld gegeben, das ein Feld beschreibt (0 = Wasser, 1 = Land), schreiben Sie einen Algorithmus, der die Anzahl der Inseln zählt (zwei Stücke Land berühren sich, wenn sie entweder vertikal oder horizontal nebeneinander liegen, nicht diagonal).
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Software Engineer

Interviewed at Google

4.4★
Feb 9, 2015

Ist ein 2D-Feld gegeben, das ein Feld beschreibt (0 = Wasser, 1 = Land), schreiben Sie einen Algorithmus, der die Anzahl der Inseln zählt (zwei Stücke Land berühren sich, wenn sie entweder vertikal oder horizontal nebeneinander liegen, nicht diagonal).

Grid Illumination: Given an NxN grid with an array of lamp coordinates. Each lamp provides illumination to every square on their x axis, every square on their y axis, and every square that lies in their diagonal (think of a Queen in chess). Given an array of query coordinates, determine whether that point is illuminated or not. The catch is when checking a query all lamps adjacent to, or on, that query get turned off. The ranges for the variables/arrays were about: 10^3 < N < 10^9, 10^3 < lamps < 10^9, 10^3 < queries < 10^9.
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Software Engineer Intern

Interviewed at Dropbox

3.9★
Sep 29, 2016

Grid Illumination: Given an NxN grid with an array of lamp coordinates. Each lamp provides illumination to every square on their x axis, every square on their y axis, and every square that lies in their diagonal (think of a Queen in chess). Given an array of query coordinates, determine whether that point is illuminated or not. The catch is when checking a query all lamps adjacent to, or on, that query get turned off. The ranges for the variables/arrays were about: 10^3 < N < 10^9, 10^3 < lamps < 10^9, 10^3 < queries < 10^9.

for encoding that {a,b,c,...,z}<->{1,2,3,...,26} if given a list of digit e.g. [1,2,3], this may represent {1,2,3}->{a,b,c} or {12,3}->{l,c} or {1,23}->{a,w}. so there are 3 possible interpretations for list [1,2,3] so, given a list of digit, calculate the number of possible interpretations for the list.
avatar

Software Engineer Intern

Interviewed at Meta

3.6★
Oct 3, 2016

for encoding that {a,b,c,...,z}<->{1,2,3,...,26} if given a list of digit e.g. [1,2,3], this may represent {1,2,3}->{a,b,c} or {12,3}->{l,c} or {1,23}->{a,w}. so there are 3 possible interpretations for list [1,2,3] so, given a list of digit, calculate the number of possible interpretations for the list.

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