user539334 in the range 1-20 you have $4$ almost prime numbers: $4,8,9,16$. Number $16$ is almost prime number because it's divisible by only one prime number $2$.

user632157 ви повинні зчитувати значення числа з потоку вводу ("з екрану"), а не просто виводити 5. Система підставляє різні значення і перевіряє відповіді згенеровані вашою програмою. У вашому випадку програма завжди виводить 5.

al95ireyiz you need to find a first meter which the rocket will travers in time less than $T$. Given the rocket is constantly accelerating, it will take less and less time to traverse each meter of the rocket's path. In the example the distance of $1$ meter will be traversed in $\sqrt{2}$ seconds, the distance of two meters will be traversed in $2$ seconds, meaning the second meter will be traversed in less than $1$ second.

I have corrected English statement because it was badly transated

xswoo степеневі числа можна записати як $y=x^z$, де $x,z$ цілі і $z>1$.

yashyk_dmitro Зверніть увагу на те що в умові не сказано що число не від'ємне

Abdul_267 if you get 81% it means you didn't do everything right. Keep in mind a rectangle may fit in the other one if you turn it to a certain angle.

user483005 it's not correct, please read other comments

Alfredo make sure your code does not attempt to get a square root of negative numbers

user909352 be sure to read input in the correct order, it's $x_1,y_1,r_1,x_2,y_2,r_2$ and not $x_1,x_2,y_1,y_2,r_1,r_2$

user809435 таблицу можно найти в ГОСТ 800333-90-06.

Таблица 14.1.3: Обогрев объёма воздуха в зависимости от типа батареи

user171027 be sure to handle correctly the case when the array has element equal to $2.5$.

Hello world

user910298 input in this problem includes multiple series of number pairs, be sure to read them all, not just the first one

farhad.abbasli remember, you program must not output anything other than the answer, any text prompt, like "enter number between 10 and 99" will be considered part of the answer.

user896933 please read other comments, this question has been answered

RofaMuslum the problem and editorial are correct, please be more specific