| Problem name | | In short | Forum |
| 01A. 50650 - Prime numbers |
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Derive all the prime numbers |
Discussion (2) » |
| 01B. 50600 - Expression |
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Arrange the "+" and "-" |
Discussion (1) » |
| 01C. 50601 - Increasing sequence |
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Вычеркнуть из ряда минимальное количество чисел |
Discussion (1) » |
| 01D. 50660 - Triangle and the point |
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Determine whether a point belongs to the triangle |
Discussion (1) » |
| 01E. 50661 - nth Power of a Digit |
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Вычислить an |
Discussion (1) » |
| 01F. 50620 - Poker |
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If 3 by 2, then output "Full House" |
Discussion (1) » |
| 02A. 50662 - Prime numbers (2) |
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Вывести все простые числа |
Discussion (3) » |
| 02B. 50625 - Permutations (-) |
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Print out all permutations of string characters |
Discussion (1) » |
| 02C. 50626 - The route |
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Find a way that the sum of numbers in the cells ... |
Discussion (1) » |
| 02D. 50667 - Intersecting Line Segments |
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Is there a common point of the two segments? |
Discussion (1) » |
| 02E. 50607 - Long sum |
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Find sum of numbers about 10 30 000 |
Discussion (1) » |
| 02F. 50647 - Spiral |
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Derive square filled numbers spiral |
Clarifications (1) » |
| 03A. 50633 - The prime factors |
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Number as a product of primes |
Discussion (1) » |
| 03B. 50720 - Permutations (2) |
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Withdraw all permutations of string characters |
Discussion (1) » |
| 03C. 50615 - Moneybox |
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Find min and max amount of money in the bank |
Discussion (1) » |
| 03D. 50666 - The card and envelope |
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Does card fit in an envelope? |
Discussion (2) » |
| 03E. 50606 - Long product |
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Find the product order number 102500 |
Discussion (1) » |
| 03F. 50616 - Snake |
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Draw square filled numbers like a "snake" |
Clarifications (1) » |
| 04A. 50634 - Perfect numbers |
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A perfect number is equal to the sum of its divisors |
Discussion (1) » |
| 04B. 50635 - Decomposition into terms |
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Representation of the sum of the integers |
Discussion (1) » |
| 04C. 50608 - Gangsters |
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Cobra gangsters max total wealth |
Discussion (1) » |
| 04D. 50627 - Area of a polygon |
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Given vertex. Find the area of a polygon |
Discussion (1) » |
| 04E. 50609 - Long division |
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Find M </ i> div N </ i> and M </ i> mod N< |
Discussion (1) » |
| 04F. 50636 - Brackets |
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Check if the brackets are in correct sequence |
Discussion (1) » |