P3954 [NOIP 2017 Junior] Score

NOIP 2017 Junior T1.

Niuniu recently studied an introductory C++ course. The total score for this course is calculated as: $$ \text{总成绩}=\text{作业成绩}\times 20\%+\text{小测成绩}×30\%+\text{期末考试成绩} \times 50\% $$ Niuniu wants to know the final score they can get in this course.

Three non-negative integers $A, B, C$, representing Niuniu’s homework score, quiz score, and final exam score, respectively. Adjacent numbers are separated by a single space. Each of the three scores is out of $100$ points.

A single integer: Niuniu’s total score for the course, also out of $100$ points.

**Sample 1 Explanation** Niuniu’s homework score is $100$ points, quiz score is $100$ points, and final exam score is $80$ points. The total score is $100 \times 20\%+100 \times 30\%+80 \times 50\%=20+30+40=90$. **Sample 2 Explanation** Niuniu’s homework score is $60$ points, quiz score is $90$ points, and final exam score is $80$ points. The total score is $60 \times 20\%+90 \times 30\%+80 \times 50\%=12+27+40=79$. **Constraints** - For $30\%$ of the testdata, $A=B=0$. - For another $30\%$ of the testdata, $A=B=100$. - For $100\%$ of the testdata, $0≤A,B,C≤100$ and $A,B,C$ are all multiples of $10$. Translated by ChatGPT 5