{"raw_statement":[{"iden":"problem statement","content":"There is an ultramarathon course totaling $100\\;\\mathrm{km}$. Water stations are set up every $5\\;\\mathrm{km}$ along the course, including the start and goal, for a total of $21$.\nTakahashi is at the $N\\;\\mathrm{km}$ point of this course. Find the position of the nearest water station to him.\nUnder the constraints of this problem, it can be proven that the nearest water station is uniquely determined."},{"iden":"constraints","content":"*   $0\\leq N\\leq100$\n*   $N$ is an integer."},{"iden":"input","content":"The input is given from Standard Input in the following format:\n\n$N$"},{"iden":"sample input 1","content":"53"},{"iden":"sample output 1","content":"55\n\nTakahashi is at the $53\\;\\mathrm{km}$ point of the course. The water station at the $55\\;\\mathrm{km}$ point is $2\\;\\mathrm{km}$ away, and there is no closer water station. Therefore, you should print $55$."},{"iden":"sample input 2","content":"21"},{"iden":"sample output 2","content":"20\n\nTakahashi could also go back the way."},{"iden":"sample input 3","content":"100"},{"iden":"sample output 3","content":"100\n\nThere are also water stations at the start and goal. Additionally, Takahashi may already be at a water station."}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}