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Because you use
endl.I changed
endlwith'\n'but I still got TLE. SolutionBut I just found out that if I pass
String sin build functions by reference it doesn't give TLE. Correct SolutionBut I am not able to understand why because we don't need to change
swhile building the tree? Please tell me this.Oh right, I did not notice you were passing
sby value.If you pass
sby value, then it gets copied for everybuildcall you make. If you pass by reference, there is only one string. Copying the string is expensive.endlis still too slow btw, even if you got accepted with it this time.