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The problem of verification the answers in 110A — Nearly Lucky Number
Hello, Codeforces!
I have solved the problem 110A — Nearly Lucky Number. Then, I start find more optimal solution by referring to the others' one. What I found is
print('NYOE S'[sum(i in'47'for i in input())in(4,7)::2])
But this short code return the wrong answer NO for the input 47474747474747474747474747474747474747474747474 — there are 47 lucky digits. Unfortunately, it was an accepted solution. 
Please help me for check it!!! Thanks everyone.
| Rev. | Lang. | By | When | Δ | Comment | |
|---|---|---|---|---|---|---|
| en3 |
|
ddinhminhhair | 2023-01-19 10:33:33 | 0 | Tiny change: 'Hello, Cod' -> '[user:MikeMirzayanov]Hello, Cod' (published) | |
| en2 |
|
ddinhminhhair | 2023-01-19 10:30:28 | 76 | ||
| en1 |
|
ddinhminhhair | 2023-01-19 10:24:23 | 597 | Initial revision (saved to drafts) |
