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Create 367_Valid_Perfect_square.java #324

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20 changes: 20 additions & 0 deletions Hacktoberfest2022/367_Valid_Perfect_square.java
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Original file line number Diff line number Diff line change
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class Solution {
public boolean isPerfectSquare(int num) {
if (num == 1)
return true;
int l=1,r=num/2;

while(l<=r)
{
int mid=l+(r-l)/2;
long sq=mid*(long)mid;
if(sq==num)
return true;
if(sq>num)
r=mid-1;
else
l=mid+1;
}
return false;
}
}