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Merge pull request #68 from gurucharan2206/GurucharancppLocal

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BetterSequentialSearch function added to SequentialSearch.h
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huihut 2020-09-03 15:02:00 +08:00 committed by GitHub
commit 3491cb2cf1
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1 changed files with 16 additions and 0 deletions
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16
Algorithm/SequentialSearch.h
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@ -5,3 +5,19 @@ int SequentialSearch(vector<int>& v, int k) {
return i; return i;
return -1; return -1;
} }
/* The following is a Sentinel Search Algorithm which only performs
just one test in each loop iteration thereby reducing time complexity */
int BetterSequentialSearch(vector<int>& v, int k) {
int last = v[v.size()-1];
v[v.size()-1] = k;
int i = 0;
while (v[i]!= k)
i++;
v[v.size()-1] = last;
if(i < v.size()-1 || v[v.size()-1] == k)
return i;
return -1;
}