Run-Length Compression
Python
Hard
3 views
Problem Description
Read a string s (no spaces), compress it as char + count for each consecutive run. Example aaabb becomes a3b2. Output compressed string.
Input Format
One string s.
Output Format
Compressed string.
Official Solution
import sys
s=sys.stdin.read().strip()
if not s: sys.exit(0)
out=[]
cur=s[0]
cnt=1
for ch in s[1:]:
if ch==cur:
cnt+=1
else:
out.append(cur+str(cnt))
cur=ch
cnt=1
out.append(cur+str(cnt))
sys.stdout.write(''.join(out))
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