Problem Background

NOIP2017 Junior Group T1

Problem Description

Cow recently took a C++ introductory course. The final grade for this course is calculated as follows:

$$ \text{Final Grade} = \text{Homework Grade} \times 20\% + \text{Quiz Grade} \times 30\% + \text{Final Exam Grade} \times 50\% $$

Cow wants to know what his final grade for this course will be.

Input Format

Three non-negative integers $A, B, C$, representing Cow's homework grade, quiz grade, and final exam grade, respectively. Each number is separated by a space, and the maximum score for each is 100 points.

Output Format

An integer representing Cow's final grade for the course, with a maximum score of 100 points.

Sample Input and Output

Sample Input #1

100 100 80

Sample Output #1

90

Sample Input #2

60 90 80

Sample Output #2

79

Notes

Sample 1 Explanation

Cow's homework grade is 100 points, quiz grade is 100 points, and final exam grade is 80 points. The final grade is $100 \times 20\% + 100 \times 30\% + 80 \times 50\% = 20 + 30 + 40 = 90$.

Sample 2 Explanation

Cow's homework grade is 60 points, quiz grade is 90 points, and final exam grade is 80 points. The final grade is $60 \times 20\% + 90 \times 30\% + 80 \times 50\% = 12 + 27 + 40 = 79$.

Data Notes

For 30% of the data, $A = B = 0$.

For another 30% of the data, $A = B = 100$.

For 100% of the data, $0 \leq A, B, C \leq 100$ and $A, B, C$ are multiples of 10.

见题面 Input 部分

见题面 Output 部分