I'm trying to solve a problem using Union Find, for storing Connected Components of a graph, and a Multiset for ordering the Components' Weights ... but i'm getting "SIGSECV ( Abort Called ) "... here is my code Link
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I'm trying to solve a problem using Union Find, for storing Connected Components of a graph, and a Multiset for ordering the Components' Weights ... but i'm getting "SIGSECV ( Abort Called ) "... here is my code Link
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Line 18 should be
Father[f1] = Father[f2];
.The reason you get a runtime error is as follows: Let's say
f1
is different froma
. Since you only change the parent pointer ofa
, the parent pointer off1
still points tof1
. However, the weight off1
is removed from the multiset. So if you call the merge function again withf1
, the program will try to eraseWeight[f1]
from the multiset. If the weight is no longer present though,Order.find(Weight[f1])
returnsOrder.end()
, and callingerase
on that produces a runtime error.this was from ongoing contest : https://www.hackerrank.com/contests/morgan-stanley-2015/leaderboard ..