How does this code 226728618 run for this problem 121A - Lucky Sum even when I run for 1 to 1000000000 this testcase, my inner loop time complexity takes 1e9. Then how is it accepted?
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Сodeforces compiles С++ code with the O2 optimization flag (https://codeforces.com/blog/entry/96344), and with this optimization the compiler is able to cope with simple summation of one number several times in one second)
Just a simple operations and a few memory
First comment in 3 years, congrats))