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When I sorted all problem according to their set of topics for merging at output I forgot to make it stable, so that the order of grouped problems stays increasing. Easy solution using 0.14 seconds, first try. Just realization with Python. Why rating is so big? u can have some problems with fourth condition, like convert char to string or something like this
20. vector
1241 ```
Topic id is a sequence <number>.<number>. ... <number>. All numbers are integers from a segment [1, 20] and have no leading zeroes. All topic id’s are unique.
```
try test:
1. graphs
1022
1065
2. geometry
1020
2.1. idea
1130
2.2. technique
1111 1065
1265
2.2.1. convex hull
1271
3. dynamic programming
1244
20. vector don't understand when you want to display the result. help? You must read the input data until the end of input stream. Read the guide for more help. |
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