Koala and Notebook

题意翻译

定义一条路径的权值为路径上所有边的编号直接相连所得到的十进制数字的大小 求$1$到每个点的最短路$mod~10^9+7$ $n,m\leq 100000$

题目描述

Koala Land consists of $ m $ bidirectional roads connecting $ n $ cities. The roads are numbered from $ 1 $ to $ m $ by order in input. It is guaranteed, that one can reach any city from every other city. Koala starts traveling from city $ 1 $ . Whenever he travels on a road, he writes its number down in his notebook. He doesn't put spaces between the numbers, so they all get concatenated into a single number. Before embarking on his trip, Koala is curious about the resulting number for all possible destinations. For each possible destination, what is the smallest number he could have written for it? Since these numbers may be quite large, print their remainders modulo $ 10^9+7 $ . Please note, that you need to compute the remainder of the minimum possible number, not the minimum possible remainder.

输入输出格式

输入格式

The first line contains two integers $ n $ and $ m $ ( $ 2 \le n \le 10^5, n - 1 \le m \le 10^5 $ ), the number of cities and the number of roads, respectively. The $ i $ -th of the following $ m $ lines contains integers $ x_i $ and $ y_i $ ( $ 1 \le x_i, y_i \le n $ , $ x_i \ne y_i $ ), representing a bidirectional road between cities $ x_i $ and $ y_i $ . It is guaranteed, that for any pair of cities there is at most one road connecting them, and that one can reach any city from every other city.

输出格式

Print $ n - 1 $ integers, the answer for every city except for the first city. The $ i $ -th integer should be equal to the smallest number he could have written for destination $ i+1 $ . Since this number may be large, output its remainder modulo $ 10^9+7 $ .

输入输出样例

输入样例 #1

11 10
1 2
2 3
3 4
4 5
5 6
6 7
7 8
8 9
9 10
10 11

输出样例 #1

1
12
123
1234
12345
123456
1234567
12345678
123456789
345678826

输入样例 #2

12 19
1 2
2 3
2 4
2 5
2 6
2 7
2 8
2 9
2 10
3 11
11 12
1 3
1 4
1 5
1 6
1 7
1 8
1 9
1 10

输出样例 #2

1
12
13
14
15
16
17
18
19
1210
121011

输入样例 #3

12 14
1 2
2 3
3 4
4 5
5 6
6 7
7 8
8 9
9 10
10 11
11 12
1 3
1 4
1 10

输出样例 #3

1
12
13
134
1345
13456
1498
149
14
1410
141011