The problem is from codeforces: http://codeforces.com/contest/265/problem/A
This is a pure simulation problem, no difficulty at all. If the current instruction matches the colour on the current stone, move one position right otherwise stay put.
#!/usr/bin/env python
s = raw_input()
t = raw_input()
j = 0
for i in t:
if i == s[j]:
j += 1
print j + 1
–EOF (The Ultimate Computing & Technology Blog) —
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