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while working in c/c++,
1.cin/cout
or
2.scanf/printf ,
which one of both , will have less execution or run time.
OR both will have equal runtime.
my aim is to reduce the runtime of my code.
To bet on relative timings of console IO functions is imho without any real use. This is completely unpredictable (depends on environment). Console output depends completely on the speed of the console and usually not on the speed of the printf/cout. Try using local file output instead of console output.