Codeforces Round 122 (Div. 2)

2 problems from Codeforces Round 122 (Div. 2) (contest 194), difficulty 900-1200. 2/2 solutions verified against sample I/O.

2 items

Codeforces Round 122 (Div. 2)

Div. 2 | 2 problems | 2/2 verified | Difficulty 900-1200 | 2m 59s

#	Problem	Rating	Tags	Accepted	Time	✓
A	Exams	900	implementation, math	10,913	1m 28s	✓
B	Square	1200	math	3,987	1m 31s	✓

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CF 194A - Exams

The author has to take n exams. Every exam receives an integer grade between 2 and 5 inclusive. A grade of 2 means the exam is failed and must be retaken. The total sum of all grades must equal exactly k.

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CF 194B - Square

We have a person walking around the border of a square whose side length is n. He starts at the lower-left corner and places a cross there immediately. After that, he keeps moving clockwise along the perimeter, placing another cross every n + 1 meters.