Lesson 2
Integer and float numbers

Last digit of integer

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Statement

Given an integer number, print its last digit.

a = int(input())
print(a % 10)

Tens digit

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Statement

Given an integer. Print its tens digit.

n = int(input())
print(n // 10 % 10)

Sum of digits

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Statement

Given a three-digit number. Find the sum of its digits.

n = int(input())
a = n // 100
b = n // 10 % 10
c = n % 10
print(a + b + c)

Fractional part

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Statement

Given a positive real number, print its fractional part.

x = float(input())
print(x - int(x))

First digit after decimal point

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Statement

Given a positive real number, print its first digit to the right of the decimal point.

x = float(input())
print(int(x * 10) % 10)

Car route

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Statement

A car can cover distance of N kilometers per day. How many days will it take to cover a route of length M kilometers? The program gets two numbers: N and M.

from math import ceil

n = int(input())
m = int(input())
print(ceil(m / n))

Digital clock

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Statement

Given the integer N - the number of minutes that is passed since midnight - how many hours and minutes are displayed on the 24h digital clock?

The program should print two numbers: the number of hours (between 0 and 23) and the number of minutes (between 0 and 59).

For example, if N = 150, then 150 minutes have passed since midnight - i.e. now is 2:30 am. So the program should print 2 30.

n = int(input())
hours = n // 60
minutes = n % 60
print(hours, minutes)

 

Total cost

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Statement

A cupcake costs A dollars and B cents. Determine, how many dollars and cents should one pay for N cupcakes. A program gets three numbers: A, B, N. It should print two numbers: total cost in dollars and cents.

a = int(input())
b = int(input())
n = int(input())
cost = n * (100 * a + b)
print(cost // 100, cost % 100)

Clock face - 1

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Statement

H hours, M minutes and S seconds are passed since the midnight (0 ≤ H < 12, 0 ≤ M < 60, 0 ≤ S < 60). Determine the angle (in degrees) of the hour hand on the clock face right now.

h = int(input())
m = int(input())
s = int(input())

print(h * 30 + m * 30 / 60 + s * 30 / 3600)

Clock face - 2

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Statement

Hour hand turned by α degrees since the midnight. Determine the angle by which minute hand turned since the start of the current hour. Input and output in this problems are floating-point numbers.

alpha = float(input())
print(alpha % 30 * 12)