why stdio works faster than iostream? CodeChef: Practical coding for everyone …
The only difference between the two accepted solutions is that one contains iostream & the other does not.
Same for two accepted solutions here–CodeChef: Practical coding for everyone .with iostream it took 0.05 sec & without iostream it took only 0.01 seconds.
bro, it would be nice if you dont share answers for an ongoing competition
anyway, imho your answer lies here maybe: c++ - Speed and stability of libraries 'stdio' vs. 'iostream' - Stack Overflow