Train passengers
Task
A train passes through stations. For every station the program reads two lines: how many passengers got on and how many got off. If -1 comes instead of the number getting on, the journey is over.
The program prints two lines: vo vlaku: … (how many passengers are on the train now) and celkom: … (how many people were on the train that day - everyone who got on). The train starts empty.
Examples
Input
10 0 5 3 -1
Expected output
vo vlaku: 12 celkom: 15
After you submit, 3 hidden tests will also check your solution: no stations, three stations, one station.
Python starts the first time you run code.
Ctrl+Enter runs the program. Tab indents. Press Esc, then Tab, to leave the editor.
Input (stdin)
Each line = one call to input().
Output
Hints
Try it yourself first. Each hint reveals a little more - and lowers the reward a little.
Signed out, hints are free - but no XP is awarded either.
Solution
The solution unlocks after the last hint.