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| Страны | Города | Организации | Всё → |
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| 4 | maroonrk | 153 |
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| 6 | -is-this-fft- | 148 |
| 6 | SecondThread | 148 |
| 8 | Petr | 147 |
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Please Help in following problem.
please help me in following problem , i tried to read its analysis ,but was unable to understand its optimised solution . I looked for various people solution ,they had used bfs, but i am unable to interpret that too.
Just give me the way ,through which i should approach this problem .
