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#F2927. Variable, or There and Back Again

    ID: 2933 传统题 2000ms 256MiB 尝试: 0 已通过: 0 难度: 5 上传者: 标签>搜索图论进阶难度共享题库Codeforces英文题面题目来源题面语言

Variable, or There and Back Again

题目描述

A. Variable, or There and Back Again
time limit per test
2 seconds
memory limit per test
256 megabytes
input
standard input
output
standard output

Life is not easy for the perfectly common variable named Vasya. Wherever it goes, it is either assigned a value, or simply ignored, or is being used!

Vasya's life goes in states of a program. In each state, Vasya can either be used (for example, to calculate the value of another variable), or be assigned a value, or ignored. Between some states are directed (oriented) transitions.

A path is a sequence of states v1,v2,...,vx, where for any 1≤i<x exists a transition from vi to vi+1.

Vasya's value in state v is interesting to the world, if exists path p1,p2,...,pk such, that pi=v for some i (1≤ik), in state p1 Vasya gets assigned a value, in state pk Vasya is used and there is no state pi (except for p1) where Vasya gets assigned a value.

Help Vasya, find the states in which Vasya's value is interesting to the world.

Input

The first line contains two space-separated integers n and m (1≤n,m≤105) − the numbers of states and transitions, correspondingly.

The second line contains space-separated n integers f1,f2,...,fn (0≤fi≤2), fi described actions performed upon Vasya in state i: 0 represents ignoring, 1 − assigning a value, 2 − using.

Next m lines contain space-separated pairs of integers ai,bi (1≤ai,bin, aibi), each pair represents the transition from the state number ai to the state number bi. Between two states can be any number of transitions.

Output

Print n integers r1,r2,...,rn, separated by spaces or new lines. Number ri should equal 1, if Vasya's value in state i is interesting to the world and otherwise, it should equal 0. The states are numbered from 1 to n in the order, in which they are described in the input.

Examples
Input
4 3
1 0 0 2
1 2
2 3
3 4
Output
1
1
1
1
Input
3 1
1 0 2
1 3
Output
1
0
1
Input
3 1
2 0 1
1 3
Output
0
0
0
Note

In the first sample the program states can be used to make the only path in which the value of Vasya interests the world, 1 2 3 4; it includes all the states, so in all of them Vasya's value is interesting to the world.

The second sample the only path in which Vasya's value is interesting to the world is , − 1 3; state 2 is not included there.

In the third sample we cannot make from the states any path in which the value of Vasya would be interesting to the world, so the value of Vasya is never interesting to the world.


题目来源:fps-www.educg.net-codeforce-1-2833.xml.zip;FPS 共享题包,题包内第 2601 题。保留原作者与原赛事署名。