Codeforces Round 228 (Div. 1)
B
Fox and Minimal path
Codeforces
1900
原题
← AC →
翻译中…

Fox Ciel wants to write a task for a programming contest. The task is: "You are given a simple undirected graph with $*n*$ vertexes. Each its edge has unit length. You should calculate the number of shortest paths between vertex 1 and vertex 2."

翻译中…

Same with some writers, she wants to make an example with some certain output: for example, her birthday or the number of her boyfriend. Can you help her to make a test case with answer equal exactly to $*k*$?

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Input

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The first line contains a single integer $*k*$ ($1 ≤ *k* ≤ 10^{9}$).

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Output

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You should output a graph $*G*$ with $*n*$ vertexes ($2 ≤ *n* ≤ 1000$). There must be exactly $*k*$ shortest paths between vertex 1 and vertex 2 of the graph.

翻译中…

The first line must contain an integer $*n*$. Then adjacency matrix $*G*$ with $*n*$ rows and $*n*$ columns must follow. Each element of the matrix must be 'N' or 'Y'. If $*G*_{*ij*}$ is 'Y', then graph $*G*$ has a edge connecting vertex $*i*$ and vertex $*j*$. Consider the graph vertexes are numbered from 1 to $*n*$.

翻译中…

The graph must be undirected and simple: $*G*_{*ii*}$ = 'N' and $*G*_{*ij*} = *G*_{*ji*}$ must hold. And there must be at least one path between vertex 1 and vertex 2. It's guaranteed that the answer exists. If there multiple correct answers, you can output any of them.

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Note

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In first example, there are 2 shortest paths: 1-3-2 and 1-4-2.

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In second example, there are 9 shortest paths: 1-3-6-2, 1-3-7-2, 1-3-8-2, 1-4-6-2, 1-4-7-2, 1-4-8-2, 1-5-6-2, 1-5-7-2, 1-5-8-2.

翻译中…

样例

Input #1
2
Output #1
4
NNYY
NNYY
YYNN
YYNN
InputCopy OutputCopy
Input #2
9
Output #2
8
NNYYYNNN
NNNNNYYY
YNNNNYYY
YNNNNYYY
YNNNNYYY
NYYYYNNN
NYYYYNNN
NYYYYNNN
InputCopy OutputCopy
Input #3
1
Output #3
2
NY
YN
InputCopy OutputCopy
题目信息
题号
388B
时间限制
1 s
内存限制
256 MB
标签
位运算
构造
图论
模拟
数学

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