wee my first ever comment on Codeforces , I don't know if someone will ever reply in the problem 1490F - Equalize the Array my 228090314 got a TLE but has the same logic with galen_colin except that he added ++m[(a[i] + 88) ^ 910591789]; , I did m[a[i]]++; when dealing with the map I don't understand why adding 88 XOR that big number and why does this fix the TLE problem , thank you guys